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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 71. Отображено 71.
25-06-2014 дата публикации

Inverter parallel-connection loop current restraining system based on PR control and dual-carrier modulation

Номер: CN103888007A
Автор: LI KAI, YAN GUOQING, ZOU JIANXIAO, ZHENG HONG, XU HONGBING, SUN NINGBO
Принадлежит:

The invention discloses an inverter parallel-connection loop current restraining system based on PR control and dual-carrier modulation. By means of the inverter parallel-connection mode, the power capacity of an inverter system is increased. Meanwhile, a proportion resonance control device is adopted in an inverter, and therefore low-frequency zero-sequence loop currents can be effectively restrained; the dual-carrier modulation method is used, a zero vector is replaced by a non-zero vector so that the high-frequency zero-sequence loop currents can be restrained. The restraining system has the advantages of being high in direct-current voltage utilization rate and small in zero-sequence loop current.

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Номер записи: 1
11-03-2015 дата публикации

PI adaptation based compound control method for active power filter

Номер: CN104410074A
Автор: XIE CHUAN, LI KAI, ZHENG HONG, ZOU JIANXIAO, HAN TAO, XU HONGBING
Принадлежит:

The invention discloses a PI adaptation based compound control method for an active power filter. According to the method, inductance change of inductors L1 and L2 in an LCL filter is detected in real time, and in combination of the inductance change of the inductors L1 and L2, a control parameter table of a PI controller is inquired, so that control parameters of the PI controller are regulated in real time. The defect that the control effect of the active power filter becomes poorer during inductance change is overcome, and the active power filter is stably controlled and normally works when the inductance changes in a certain range.

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Номер записи: 2
12-11-2008 дата публикации

Method for synchronizing host parameter of three-scale redundancy control system

Номер: CN0101304303A
Автор: HONGBING XU, JIANXIAO ZOU, XU HONGBING, ZOU JIANXIAO
Принадлежит:

The invention relates to a synchronizing method for host parameters of a triple redundancy control system, belonging to the redundancy control field and adopting a method of point-to-point request-response combining timestamp to carry out the parameter synchronization to two hosts in the system. The synchronizing method is as follows: after initialization, a new power up host judges whether other host is on line at first. If other host does not on line, operating according to parameters directly and outputting; if other host is on line, sending a request packet to the host, and the request packet comprises a timestamp T1 when the packet leaving; and then the online host receives the request packet and fills a time stamp T2 when the packet arriving, the parameters that need to be synchronized is packed, a time stamp T3 when a respond packet leaving is filled in and is sent back to the new power up host; the new power up host receives the respond packet and fills a time stamp T4. According ...

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Номер записи: 3
11-02-2009 дата публикации

Zeroing calibration resetting and blade dead-lock solving method for electric multiblade optical grating

Номер: CN0101364453A
Автор: XU HONGBING, ZOU JIANXIAO, ZHENG HONG, ZHANG JIAN, XIE HUA, ZHENG GANG, HONGBING XU, JIANXIAO ZOU, HONG ZHENG, JIAN ZHANG, HUA XIE, GANG ZHENG
Принадлежит:

The invention is applied to solve the deadlock fault of vanes and the zeroing position limit problems in intensity-modulated radiotherapy, while the prior art can only retune the vanes from the deadlock state and perform zeroing by dismantling. The invention realizes zeroing and position limit by adopting opposite type photoelectric detection; and adopts multistage switch to return the vanes from the deadlock state. The invention can return a system to the normal operation state under software control. In the opposite type photoelectric detection, a narrow far infrared ray beam is arranged at each end of a multi-vane grate. An infrared ray receiving terminal sets the tail end of each vane, which is positioned at the edge of the infrared ray, to be a zero point to limit the vane position, and codes the zero position of each vane corresponding to the encoder code of a motor at the same time. The multistage switch is realized through controlling a micro-motor with an encoder by an electric ...

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Номер записи: 4
01-04-2015 дата публикации

User dissatisfaction degree considered household equipment dispatching method

Номер: CN104484711A
Автор: ZOU JIANXIAO, YANG BING, LI LIYING, PENG CHAO, XU HONGBING
Принадлежит:

The invention discloses a user dissatisfaction degree considered household equipment dispatching method, which comprises the following steps: firstly, making statistics on all pieces of household equipment which participates in dispatching, dividing all pieces of household equipment into fixing equipment and adjustable equipment, and collecting the use power of each piece of equipment as well as the expected startup time and the use duration of each piece of equipment by a user, wherein the adjustable equipment also comprises maximum allowable ahead time/ delay time for equipment startup and preset extra punishment unit price generated by the ahead use/ delay use; then, selecting dispatching equipment from the adjustable equipment, weighting power consumption expenditure of all pieces of equipment with a dissatisfaction degree brought by a deviation between the practical startup time and the expected startup time of the dispatching equipment by a target function when the optimal startup ...

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Номер записи: 5
25-06-2014 дата публикации

Locating method of mobile node in wireless sensor network

Номер: CN103885030A
Автор: ZOU JIANXIAO, LU YI, FAN SHICAI, XU HONGBING
Принадлежит:

The invention discloses a locating method of a mobile node in a wireless sensor network. The locating method comprises the steps that firstly, training sample data of RSSI values and training sample data of distances are collected and preprocessed through Gauss filtering; the preprocessed training sample data are adopted to train a BP neural network to obtain relationship models of the RSSI values and the distances; fixed nodes are used for collecting the RSSI value of the mobile node to be located and Gauss filtering is conducted; the RSSI value is input into the BP neural network to obtain distance values between the corresponding fixed nodes and the mobile node; the coordinate of the mobile node is obtained according to the coordinates of the fixed nodes and the distance values between the fixed nodes and the mobile nodes and by the adoption of a three-point centroid method. The locating method is used for locating mobile nodes in wireless sensor networks, the influences on RSSI values ...

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Номер записи: 6
30-07-2014 дата публикации

Energy storage SOC optimization control method in wind storage system

Номер: CN103956758A
Автор: ZOU JIANXIAO, XU HONGBING, PENG CHAO, XIN XIAOSHUAI, SHI JIE
Принадлежит:

The invention discloses an energy storage SOC optimization control method in a wind storage system. According to predicted power of a wind power farm in a period of time in the future, a particle swarm algorithm is used for solving an SOC optimization model to obtain the optimal SOC range of an energy storage system in the running process of the wind storage system; according to real-time charge states, the charge state migration proportion relative to the optimal SOC range is obtained, the charge state migration proportion and the set power at the current moment of the energy storage system are used as input, a filtering time constant is used as output, a fuzzy control strategy is used for adjusting the filtering time constant in real time, and grid-connection power is stabilized through low-pass filtering of real-time power of the wind power farm. According to the energy storage SOC optimization control method, the SOC of the energy storage system is adjusted in advance according to the ...

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Номер записи: 7
12-08-2015 дата публикации

Frequency-adaptive slide window DFT harmonic wave detection method

Номер: CN104833853A
Автор: XIE CHUAN, LI KAI, ZHENG HONG, ZOU JIANXIAO, XU HONGBING, YANG LEI
Принадлежит:

The invention discloses a frequency-adaptive slide window DFT harmonic wave detection method. The method involves: first of all, acquiring voltage signals of a power network, and then synchronizing the voltage phase and the frequency of the power network by use of a digital phase-locked loop technology; and next, sampling load current signals, and carrying out DFT positive transformation on the acquired load current signals x(t) through a frequency-adaptive slide window iteration method to respectively obtain x-axis components and y-axis components of harmonic waves of each time, accordingly calculating instruction signals of the harmonic waves at an h-th time, and finally, accumulating harmonic wave instructions at each time to obtain a total harmonic wave instruction. The method provided by the invention solves the problem of extraction of real-time harmonic wave instructions of an active power filter when the voltage frequency of the power network fluctuates, at the same time, can also ...

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Номер записи: 8
23-09-2015 дата публикации

Positive and negative pulse charging converter for storage battery

Номер: CN104935063A
Автор: ZOU JIANXIAO, LI KAI, XU HONGBING, WANG HUAIWEN, NIU JIA, WU WENJIE
Принадлежит:

The invention discloses a positive and negative pulse charging converter for a storage battery. A bilateral full-bridge LLC (Logical Link Control) resonant circuit is taken as a main charging topology, so that the defect that the implementation of negative pulses is limited by application occasions and power levels is overcome while soft switching is realized. Meanwhile, a power main circuit comprises a bridge type uncontrollable rectifying circuit and a bilateral full-bridge LLC resonant circuit. During discharging of the storage battery, the bus capacitive voltage on a high-voltage side, namely, a rectifying side is raised. During initial charging at a positive pulse charging stage, open-loop control is adopted, namely, the duty ratios and frequencies of switching tubes Q1-Q4 are kept the same as the duty ratios and frequencies in a previous charging period. Since the bus capacitive voltage is high, the charging current is increased correspondingly and decreased gradually till a charging ...

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Номер записи: 9
13-08-2014 дата публикации

Wind and solar storage combining power generation system smooth control method based on power generation power curves

Номер: CN103986190A
Автор: PENG CHAO, ZOU JIANXIAO, XU HONGBING, XIN XIAOSHUAI, HAN LU
Принадлежит:

The invention discloses a wind and solar storage combining power generation system smooth control method based on power generation power curves. Based on the predication power information of a wind power plant and a photovoltaic power station, a system power prediction curve is subjected to optimization, a system power generation power curve is obtained, according to the total power generation power value in the system power generation power curve, corresponding prediction values in a wind power plant power prediction curve and a photovoltaic power predication curve are processed, a wind power generation power curve, a photovoltaic power generation power curve and an energy storage charging-discharging power curve are obtained, subsystems are controlled to work according to the power curves, and under the premise that an energy storage charging state is kept at a reasonable level, power fluctuation is effectively output through a smooth system. The schedulability of the wind power plant ...

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Номер записи: 10
03-06-2015 дата публикации

Border-crossing detection method and border-crossing monitoring system based on video monitoring

Номер: CN104680555A
Автор: ZOU JIANXIAO, CHEN HUA, XU HONGBING, YU LI
Принадлежит:

The invention discloses a border-crossing detection method and a border-crossing monitoring system based on video monitoring. The border-crossing detection method comprises the following steps: obtaining a closed boundary line and a safe passage line according to an endpoint of the top safe passage line of a boundary line set by a user; obtaining a tracking region through expansion and reduction of the closed boundary line; detecting a moving object of each frame of video monitoring image, to screen out a moving object region in the tracking region; performing matching tracking on the screened moving object region and a tracking object, to obtain a coordinate queue of the tracking object; performing object behavior analysis on the tracking object; judging whether a border-crossing risk exists; if no border-crossing risk exists, doing nothing; if a great border-crossing risk exists, warning; otherwise, judging whether an early warning for the current abnormal situation is required according ...

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Номер записи: 11
25-07-2023 дата публикации

Single-stage multi-port motor driving system and control method

Номер: CN116488538A
Автор: ZHOU DEHONG, CHEN QIUYU, SHEN ZEWEI, ZOU JIANXIAO
Принадлежит:

The invention discloses a single-stage multi-port motor driving system and a control method, relates to the technical field of motor control, and solves the technical problem that a hybrid energy source electric vehicle is subjected to two-stage energy conversion, and the power density and the energy transmission efficiency are reduced. The system comprises a single-stage multi-port motor driver, a three-phase alternating-current motor, a first direct-current power supply and a second direct-current power supply, the single-stage multi-port motor driver comprises a first bridge arm, a second bridge arm and a third bridge arm; the first bridge arm, the second bridge arm and the third bridge arm are connected in parallel at two ends of the first direct-current power supply; the second direct-current power supply is connected in parallel at two ends of middle lines of the first bridge arm, the second bridge arm and the third bridge arm; and the first bridge arm, the second bridge arm and the ...

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Номер записи: 12
30-07-2014 дата публикации

Three-phase grid-connected inverter anti-islanding detection method

Номер: CN103954863A
Автор: LI KAI, ZOU JIANXIAO, ZHENG HONG, XU HONGBING, XIE QIANG
Принадлежит:

The invention discloses a three-phase grid-connected inverter anti-islanding detection method. By setting a relation characteristic curve between the frequency of reactive current and the frequency of power grid side voltage, reactive current disturbance is superposed on a current inner ring set value to obtain a new inner ring reactive current set value, and the advantages that influences on the electric energy quality are small, the island detection time is short, the disturbance direction is self-adaptive, and the slope of the disturbance equation is self-adaptive are achieved. According to specific configuration, the corresponding disturbance quantity is calculated by a disturbance rule calculating module, then, the corresponding disturbance quantity is superposed on the reactive current inner ring set value, and therefore island detection of a three-phase grid-connected inverter based on a power grid side feedback current and power grid side voltage frequency characteristic curve can ...

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Номер записи: 13
26-03-2014 дата публикации

Household electric utilization optimizing method based on energy storage properties of electric automobile

Номер: CN103679302A
Автор: LI LIYING, ZOU JIANXIAO, XU HONGBING, CHEN SI
Принадлежит:

The invention discloses a method based on predicted electricity price and energy storage properties of an electric automobile. According to the electric utilization cost of household electric appliances, charging cost of a storage battery of the electric automobile, loss cost of the storage battery of the electric automobile and discharging benefits of the storage battery of the electric automobile, the SoC (state of charge) of the storage battery for optimizing of electric utilization cost is determined. When the electric automobile comes back, the SoC of the storage battery meets and is higher than the SoC of the storage battery for optimizing of electric utilization cost, the nonadjustable load is supplied with power, so the household electric utilization cost is reduced, and meanwhile, the load of a power grid in the peak period is reduced. Meanwhile, the new electric utilization load peak caused by a high-power charging load power supply network can be effectively avoided; according ...

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Номер записи: 14
13-04-2011 дата публикации

Method for distributing active power of wind power station

Номер: CN0102013699A
Автор: Xu Hongbing, Zheng Gang, Zou Jianxiao
Принадлежит:

The invention discloses a method for distributing active power of a wind power station, comprises the steps of predicating the power information and classifying a wind power generating unit into five types according to the operating parameter and fault of the wind power station, combining with the unit classification and executing an increasing and decreasing power distribution strategy, thereby the distribution of the active power of the wind power station is optimized and the use ratio of the wind power unit is improved. As the factors of the unit, such as the actual operating state, parameter and fault are considered in the active power distribution method, the fluctuation of the output power of the wind power station is varied slowly and stable operation is achieved by reasonably distributing the power to the units according to the increasing and decreasing power adjusting ability of the unit, and the real-time output power of the wind power station reaches the setting value of the ...

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Номер записи: 15
27-06-2023 дата публикации

Pedestrian re-identification method suitable for field generalization

Номер: CN116343294A
Автор: ZHOU XUE, DING JIN, ZOU JIANXIAO, XU HONGBING
Принадлежит:

The invention discloses a pedestrian re-identification method suitable for field generalization, and belongs to the technical field of computer vision and machine learning. The method comprises the following steps: constructing a domain normalization module DN by combining distribution information of an IN layer and a BN layer, and replacing a normalization module BN of a deep network structure in a deep learning network model by using the domain normalization module DN to construct a strong baseline model; in addition, a hidden distribution space is constructed by using the distribution information of all the source domains, and distribution alignment is realized by projecting the distribution of the source domains and the target domain to the hidden distribution space; meanwhile, an anti-normalization module AN is designed, each source domain is regarded as a simulation target domain of other source domains, and on the basis that style information and identity authentication information ...

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Номер записи: 16
11-03-2015 дата публикации

Charge state control method of energy storage battery

Номер: CN104410093A
Автор: LI KAI, ZOU JIANXIAO, ZHENG HONG, XU HONGBING, YANG HUIWEN
Принадлежит:

The invention discloses a charge state control method of an energy storage battery. The charge state control method comprises the following steps: at first, calculating a difference value delta SOC between an SOC set value SOC ref of the energy storage battery and the current SOC state value SOC bat of the energy storage battery, simultaneously inputting the SOC bat into a filtering time constant control module to obtain a filtering time constant tao, obtaining a control quantity PSOC through a dead zone control module and a PI (Proportional Integral) controller according to the delta SOC, obtaining a power quantity Pbat controlled by SOC through a low pass filter with the filtering time constant tao according to the control quantity PSOC, carrying out amplitude limit by an amplitude limiting module after overlapping the power quantity Pbat with the given power Pref of the energy storage battery to obtain the actual given power of the energy storage battery. The method effectively controlling ...

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Номер записи: 17
25-07-2023 дата публикации

Micro-grid-oriented quasi-single-stage multi-port inverter system and modulation method

Номер: CN116488493A
Автор: ZHOU DEHONG, LI MINGXUAN, SHEN ZEWEI, ZOU JIANXIAO
Принадлежит:

The invention relates to the technical field of inverters, in particular to a micro-grid-oriented quasi-single-stage multi-port inverter system, which comprises a direct-current power supply, a DCDC converter circuit, a three-phase ANPC inverter circuit, an output circuit and a direct-current bus, a first port of the three-phase ANPC inverter circuit is connected with a direct-current power supply through a direct-current bus, a second port of the three-phase ANPC inverter circuit is connected with the direct-current power supply through the DCDC converter circuit and the direct-current bus, and a third port of the three-phase ANPC inverter circuit is connected with the output circuit. The system not only realizes wide-range voltage input and reduces the power loss of the DCDC converter, but also can enable the inverter system to output undistorted current under the condition of non-uniformly distributed and dynamically changed space vectors caused by changes of battery voltage and bus ...

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Номер записи: 18
26-02-2014 дата публикации

Wireless safety monitor system of support structure based on ZigBee and GPRS

Номер: CN103607464A
Автор: WANG ZELIN, LI ZIMING, GONG YIPENG, GAN XIAOHONG, CHU BINQIAN, LIU YUEPENG, GAO TIECHENG, LIU ZENGHUA, ZOU JIANXIAO, HE CUNFU
Принадлежит:

The invention provides a wireless safety monitor system of a support structure based on ZigBee and GPRS technology. The wireless safety monitor system is composed of monitor spots and a remote monitor center. The monitor spots form a small-size local area network through the ZigBee wireless sensor network; the remote monitor center monitors and receives data sent by a GPRS DTU through the Internet; a human-computer interaction interface is set by using LabVIEW software, the collected data are displayed and stored in real time, the functions of data inquiring, threshold value alarming and the like are achieved, and finally safety monitoring on the support structure is achieved in an on-line, wireless, rapid and real-time mode.

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Номер записи: 19
25-03-2015 дата публикации

Reactive power allocating method for battery energy storage power station

Номер: CN104467031A
Автор: LI KAI, ZHENG HONG, ZOU JIANXIAO, LIANG ZHENGFENG, LI MENGSHU
Принадлежит:

The invention discloses a reactive power allocating method for a battery energy storage power station. Units are classified according to real-time active power of all units in the battery energy storage power station, the maximum output reactive power values of all the units are calculated in a classified mode according to the reactive power dispatching instruction values and the classification result, and the reactive power allocation is carried out on all the units in the whole battery energy storage power station. By means of the real-time working state of the energy storage units in the battery energy storage power station, the reactive power allocation of the battery energy storage power station can be safely, stably and conveniently achieved, and the technical effects of reactive power responding and energy storage equipment service life prolonging are achieved.

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Номер записи: 20
12-11-2008 дата публикации

Novel method of wind generating set remote maintenance

Номер: CN0101303592A
Автор: HONGBING XU, JIANXIAO ZOU, XU HONGBING, ZOU JIANXIAO
Принадлежит:

A new method for remote maintenance of a wind generating set relates to an automatic control of the wind power generation. Under the control of a remote maintenance software of a wind driven generator, a remote parameter configuration program module, a remote upgrading program module and a remote flow control program module which are installed in a controller of the wind driven generator are adopted to realize the remote configuration of working parameters of the wind driven generator, the remote upgrading of a controller program of the wind driven generator and the flow control of the wind driven generator. The method of the invention realizes the remote upgrading of controller program software of the wind driven generator, remote flow control and remote parameter configuration, thus dramatically improving the maintenance efficiency and maintenance effect of the wind driven generator and is convenient and reliable for usage and is easy to popularize.

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Номер записи: 21
12-08-2015 дата публикации

Foreground detection method based on self-adaptive Codebook background model

Номер: CN104835145A
Автор: ZHOU XUE, ZOU JIANXIAO, XU HONGBING, QIN ZHIYUAN
Принадлежит:

The invention discloses a foreground detection method based on a self-adaptive Codebook background model. The method comprises: firstly, using a training sequence to train to obtain a Codebook background model, according to the Codebook background model, forming a background image, performing background subtraction on a to-be-detected image to obtain a foreground binary image, deleting the foreground region whose area is smaller than a preset threshold, updating corresponding pixel point information to the Codebook background model, setting a pixel neighborhood for each pixel point in each foreground region block, according to HOG feature vectors of regions corresponding to pixel neighborhoods in a to-be-detected image grey-scale map and a background image grey-scale map, determining whether the pixel point is a pseudo- foreground pixel point, if yes, updating corresponding pixel point information to the Codebook background model; and then, combining a brightness range and a cross-correlation ...

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Номер записи: 22
23-05-2023 дата публикации

Efficiency optimization control method of Buck-Boost LLC converter

Номер: CN116155100A
Автор: SHEN ZEWEI, CHEN YIFAN, ZHOU DEHONG, WANG CHENXU, ZOU JIANXIAO
Принадлежит:

The invention discloses an efficiency optimization control method for a Buck-Boost LLC converter, and the method comprises the steps: changing the control margin of the Buck-Boost LLC converter through phase shift control and dead time adjustment, and achieving the efficiency optimization of the Buck-Boost LLC converter. Specifically, by adjusting the phase difference of PWM signals between a Buck bridge arm and an integrated bridge arm, primary side conduction loss is reduced on the premise that soft switching of primary side switching tubes S1 and S2 on the Buck bridge arm is achieved, and the efficiency of the Buck-Boost LLC converter is improved; besides, by adjusting the dead zone time of the switch tubes of the integrated bridge arm, the time for transmitting energy from the primary side to the secondary side is prolonged and the dead zone time is shortened on the premise of realizing soft switching of the primary side switch tubes S3 and S4 on the integrated bridge arm, so that the ...

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Номер записи: 23
24-06-2015 дата публикации

Human body target detection method based on Omega shape features

Номер: CN104732248A
Автор: ZHOU XUE, ZOU JIANXIAO, XU HONGBING, CAI SHIBIN
Принадлежит:

The invention discloses a human body target detection method based on Omega shape features. The method includes the steps that first, the HOG features of all samples in training samples are extracted, the feature column vectors of the positive samples and the negative samples are combined to obtain two feature matrixes, the feature matrix of the positive samples is subjected to orthogonal non-negative matrix factorization, an obtained orthogonal basis matrix is used as the initial value of a feature projection matrix, and a final feature projection matrix is obtained through an LMNN algorithm according to the feature column vectors of all the samples; then the two feature matrixes are mapped according to the feature projection matrix, and each feature column vector in an obtained new feature matrix and a corresponding class tag message are input to an SVM classifier to be trained; afterwards, the obtained SVM classifier is used for conducting human body target detection. According to the ...

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Номер записи: 24
07-07-2023 дата публикации

Multi-target tracking model compression method based on knowledge distillation

Номер: CN116402848A
Автор: ZHOU XUE, LU HAOJIE, ZOU JIANXIAO, XU HONGBING
Принадлежит:

The invention discloses a multi-target tracking model compression method based on knowledge distillation, belongs to the technical field of computer vision, machine learning and the like, and particularly relates to a multi-target tracking knowledge distillation method based on deep learning. The lightweight multi-target tracking model trained by the method can extract more discriminative target ID features, the tracking continuity and stability of the model are improved, the conditions of target missing detection, false detection and identity drifting of the model are less, the detection performance is greatly improved, and the detection efficiency is improved. The tracking capability of the teacher model is effectively migrated to the student model, and model compression of multi-target tracking is realized. The method can also be applied to various multi-target tracking algorithms and lightweight structures, and has good universality and practical value.

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Номер записи: 25
04-03-2015 дата публикации

Frequency-adaptation improved resonant control method for active power filter

Номер: CN104393598A
Автор: XIE CHUAN, LI KAI, ZOU JIANXIAO, YANG HUIWEN
Принадлежит:

The invention discloses a frequency-adaptation improved resonant control method for an active power filter. Through changing the central frequency of a resonant controller in real time through a phase-locked loop, the disadvantage of narrow frequency adaptation range of an existing control method is overcame, and the frequency adaptation range is improved; according to the actual configuration, through arranging an improved resonant controller or an improved quasi resonant controller in a circuit controller, the resonant control effect is kept, and the system stability is improved; the controller is directly designed at a discrete domain, and accordingly the error due to converting to the discrete domain from a continuous domain is avoided.

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Номер записи: 26
23-09-2015 дата публикации

Standby power supply device based on vanadium battery and control method

Номер: CN104934997A
Автор: MA LAN, LI KAI, ZOU JIANXIAO, XIE CHUAN, XIN XIAOSHUAI, DAI LINGRAN
Принадлежит:

The invention discloses a standby power supply device based on a vanadium battery and a control method, which realize the power supply of the load motor and the shutdown of the standby power supply according to the cooperation of the vanadium battery and the lead-acid battery. In the concrete configuration, when the standby power supply supplies power to the load motor, the vanadium battery is working on a current source mode. The vanadium battery is enabled to output constant current by taking collected bus current and output current of a DC-DC1 module as control objects. A lead-acid battery is working on a voltage source mode and bus voltage is stabilized by taking the bus voltage as a control object. Alternating current is outputted to a load motor through an inversion process. The standby power supply device based on the vanadium battery and the control method are simple in operation and accord with the needs of the development of the energy storage system.

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Номер записи: 27
27-05-2015 дата публикации

Anomaly detection method based on vehicle trajectory similarity

Номер: CN104657746A
Автор: FAN SHICAI, CAI JING, ZOU JIANXIAO, XU HONGBING
Принадлежит:

The invention discloses an anomaly detection method based on vehicle trajectory similarity. The anomaly detection method comprises the following steps: firstly extracting vehicle trajectories and directional angle sequences of the vehicle trajectories; then clustering through calculating similarity measurement among the trajectories, extracting typical trajectories according to the directional angle sequences, calculating similarity measurement between the typical trajectories and the vehicle trajectories and establishing a deviation statistical model to obtain a confidence interval of the similarity measurement; finally calculating similarity measurement between the trajectories to be detected and the typical trajectories and judging whether the anomaly exists or not according to the confidence interval. Concepts are more directly realized through the method and are easily integrated on a traffic anomaly alarm system. According to the method, the normal and abnormal differentiation degree ...

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Номер записи: 28
19-08-2015 дата публикации

Instruction compensation control method of active power filter

Номер: CN104852379A
Автор: ZOU JIANXIAO, LI KAI, XIE CHUAN, ZHENG HONG, XU HONGBING, YANG HUIWEN
Принадлежит:

Disclosed in the invention is an instruction compensation control method of an active power filter. When a harmonic current detection module carried out inverse discrete Fourier transform, the delay time caused by an anti-aliasing filter and a digital PI control system can be compensated, thereby eliminating the influence on the active power filter compensation precision by the delay time caused by the anti-aliasing filter and the digital PI control system and thus improving the compensation precision of the active power filter.

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Номер записи: 29
14-07-2023 дата публикации

Double-inverter temperature balance control method of open winding motor driving system

Номер: CN116436374A
Автор: SHEN ZEWEI, LIN SIYI, ZHOU DEHONG, ZOU JIANXIAO, LIU JINING
Принадлежит:

The invention discloses a dual-inverter temperature balance control method for an open-winding motor driving system. The method comprises the following steps: firstly, detecting a three-phase voltage controlled and output by a motor according to a sensor and a coordinate transformation module in the open-winding motor; detecting the temperature difference of the two parallel inverters, summing the temperature difference with a given temperature difference reference value, inputting the sum to a temperature controller, and outputting an amplitude distribution deviation value after the sum is controlled by the temperature controller; the method comprises the following steps: firstly, generating a three-phase reference voltage command, then distributing the amplitude of the reference voltage output by a motor controller based on a PS-SPWM strategy to form a new output three-phase reference voltage, and finally selecting a triangular carrier to compare the amplitude with the new three-phase ...

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Номер записи: 30
03-06-2015 дата публикации

Image-based crowd massing state detection method

Номер: CN104680140A
Автор: YU LI, ZHANG GE, ZOU JIANXIAO, XU HONGBING
Принадлежит:

The invention discloses an image-based crowd massing state detection method which comprises the following steps: extracting and tracking characteristic points, calculating the speed of the characteristic points according to monitoring video images of the characteristic points in a previous frame and a current frame, clustering the characteristic points according to the speed, calculating the group gathering degree for each cluster, calculating the overall group gathering degree, and obtaining a current crowd massing state according to a preset speed threshold value and a preset group gathering degree threshold value. The method can be used for detecting crowd massing states in different scenes; the crowd massing state is analyzed by virtue of a time-varying topological network graph and a graph theory model, and the gathering degree can be quantitatively measured; the crowd massing state is collaboratively judged in combination with the group gathering degree and crowd speed, so that convenience ...

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Номер записи: 31
11-03-2015 дата публикации

Active power distribution method of battery energy storage power station

Номер: CN104410094A
Автор: LI KAI, ZOU JIANXIAO, LIANG ZHENGFENG, LI MENGSHU, XU HONGBING, MA LAN
Принадлежит:

The invention discloses an active power distribution method of a battery energy storage power station. SOC (state of charge) values and active power of battery units are acquired in real time, the battery units of the energy storage power station are classified, and charging and discharging ranges of each class of the battery units are calculated; according to the charging and discharging ranges of each class of the battery units, the charging and discharging regulating capacity of the battery units is calculated, and finally, distribution of the active power is performed on each battery unit according to the regulating capacity of the battery units. Thus, the energy storage power station responds to scheduling of a power grid through control on charging and discharging of the battery units, and the acceptable capacity of the power grid for intermittent renewable energy source power generation is increased; secondly, the battery units are classified according to real-time SOCs of the battery ...

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Номер записи: 32
04-07-2023 дата публикации

Multi-port motor driving system with wide power adjusting range and control method

Номер: CN116388632A
Автор: ZHOU DEHONG, LIU HAICHUAN, SHEN ZEWEI, ZOU JIANXIAO
Принадлежит:

The invention discloses a multi-port motor driving system with a wide power adjusting range and a control method, relates to the technical field of motor driving, and solves the technical problems that the power adjusting range of a single-pole multi-port motor driver is limited, and power cannot be flexibly selected. The system comprises a first direct-current power supply, a second direct-current power supply, a first direct-current bus capacitor, a second direct-current bus capacitor, a wide-power-range multi-port converter and a three-phase permanent magnet synchronous motor, the wide-power-range multi-port converter comprises a DC/DC converter, a first bridge arm, a second bridge arm and a third bridge arm, the first DC bus capacitor is connected in parallel with the first DC power supply. The second DC bus capacitor is connected in parallel with the second DC power supply. The first DC power supply and the second DC power supply are connected in parallel with the DC/DC converter.

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Номер записи: 33
02-09-2015 дата публикации

Control method of multi-machine parallel optimized operation of active power filters

Номер: CN104882885A
Автор: LI KAI, XIE CHUAN, ZOU JIANXIAO, ZHENG HONG, XU HONGBING, DAI HONGWEI
Принадлежит:

The invention discloses a control method of multi-machine parallel optimized operation of active power filters (APFs). The method comprises: selecting a novel parallel topological structure; setting a current sharing method of each APF in a parallel system; establishing a simulation model of power consumption and operation time of the parallel system; performing optimization by taking a minimum total energy consumed when the parallel system compensates a harmonic wave; and enabling operation time and service life of each APF to be same in the whole parallel system. Comparing the parallel system before and after optimization, advantages of the total energy consumption and total operation time of the parallel system are obvious.

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Номер записи: 34
30-05-2023 дата публикации

Efficiency optimization control method of phase-shifted full-bridge DC/DC converter

Номер: CN116191841A
Автор: SHEN ZEWEI, SHI YANSONG, ZHOU DEHONG, ZOU JIANXIAO, LIU YUCHUN
Принадлежит:

The invention discloses an efficiency optimization control method for a phase-shifted full-bridge DC/DC converter, and the method achieves the maximum utilization of a synchronous rectifier tube through the improvement of a synchronous rectification control strategy, and achieves the efficiency optimization of the phase-shifted full-bridge DC/DC converter through a digital control method. Specifically, by calculating the real-time duty ratio loss time tDloss and combining a lookup table and a fitting function, rapid calculation and timely response are achieved to compensate the conduction time sequence of a synchronous rectifier tube, so that the conduction time of a body diode is shortened, the conduction loss is reduced, and the system efficiency is improved.

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Номер записи: 35
15-06-2011 дата публикации

Ultrasonic wave wind speed and wind direction measuring device of wind generating set

Номер: CN0102095890A
Автор: JIANXIAO ZOU, HONGBING XU, CHAO PENG, ZOU JIANXIAO, XU HONGBING, PENG CHAO
Принадлежит:

The invention discloses an ultrasonic wave wind speed and wind direction measuring device of a wind generating set, comprising an ultrasonic wave wind speed and wind direction meter and a wind generating set cabin controller, wherein the ultrasonic wave wind speed and wind direction meter comprises an ultrasonic wave transceiver module, a central control unit, a solar energy accumulation power supply module and a ZigBee wireless communication module; the ultrasonic wave transceiver module collects the wind speed and the wind direction under the control of the central control unit; the collected wind speed and wind direction data is sent to the wind generating set cabin controller via the ZigBee wireless communication module so as to control the wind generating set; the solar energy accumulation power supply module supplies power for the whole ultrasonic wave wind speed and wind direction meter by utilizing generated electrical energy; and wireless communication and the solar energy accumulation ...

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Номер записи: 36
26-03-2014 дата публикации

Human face image illumination processing method based on retina model

Номер: CN103679157A
Автор: YU LI, ZOU JIANXIAO, XU HONGBING, SONG YINGHUI
Принадлежит:

The invention discloses a human face image illumination processing method based on a retina model. By adopting the working mechanism of combining a human retina model and two improved Retinex algorithms to simulate the human retina, the high stability and high recognition rate of image recognition are realized. Meanwhile, when the actual image processing is carried out, the local enhancement of the image is carried out by utilizing the single-scale Retinex algorithm, so the contrast enhancement effect of the image is realized; the image edge is enhanced through the self-adaptive smooth Retinex algorithm, the noise of the reflection image and the noise caused by the single-scale Retinex algorithm processing are eliminated, and the function of enhancing the image edge is realized. By combining the two algorithms, the extraction of human face illumination invariants is realized, and the method is suitable for the rapid development of the current technical field of human face recognition.

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Номер записи: 37
12-08-2015 дата публикации

Frequency wide-range self-adaptive repetition control method of active power filter

Номер: CN104836232A
Автор: XIE CHUAN, ZHANG GANG, ZHENG HONG, ZOU JIANXIAO, XU HONGBING, HU CHEN
Принадлежит:

The invention discloses a frequency wide-range self-adaptive repetition control method of an active power filter. First of all, voltage frequency signals of a power network are tracked in real time through a phase-locked loop, under the condition that a switch frequency is unchanged, the ratio of the switch frequency to a real-time power network frequency is calculated, finally, the integer portion of the ratio is taken as a number of beats of a fundamental wave lag of an improved repetition controller, and the decimal portion of the ratio forms a time-delay link which is approximated by use of a one-order inertia link, such that under the condition that the power network frequency fluctuates, it is ensured that the resonance frequency of the repetition controller is consistent with the actual fundamental wave and harmonic frequency of the power network, and thus the compensation effect of the active power filter in case of fluctuations of the power network frequency is not reduced.

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Номер записи: 38
09-06-2023 дата публикации

Unified zero sequence signal injection PWM method for dual three-phase motor driving system

Номер: CN116248008A
Автор: SHEN ZEWEI, LI ZHIJIAN, ZHOU DEHONG, ZOU JIANXIAO, FU XIAOMING
Принадлежит:

The invention discloses a unified zero-sequence signal injection PWM method for a dual three-phase motor driving system, and the method comprises the steps: building a mathematical model of a unified zero-sequence injection signal through six-phase reference voltage, determining the unified zero-sequence injection signal of two sets of three-phase inverters through an undetermined coefficient method, generating a modulation wave signal through the combination of the six-phase reference voltage, and finally, carrying out the pulse width modulation of the two sets of three-phase inverters. And on the basis of a carrier wave comparison PWM principle, a switching signal used for controlling a switching tube of the six-phase inverter to act is generated through the modulated wave signal.

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Номер записи: 39
03-06-2015 дата публикации

Intermittent process batch data synchronizing method based on improved DTW (Dynamic Time Wrapping) algorithm

Номер: CN104679844A
Автор: FAN SHICAI, CHEN CHUAN, ZOU JIANXIAO, XU HONGBING
Принадлежит:

The invention discloses an intermittent process batch data synchronizing method based on an improved DTW (Dynamic Time Wrapping) algorithm. The method comprises the following steps: selecting a plurality of batches of data of the same sampling point number from the batch data of a normal intermittent process, clustering the batch data by adopting a clustering algorithm, and selecting batch data which is closest to a clustering center from each cluster for serving as reference batch data, totaling D reference batch data; performing equal-length synchronization processing on testing batch data needing to be synchronized by taking the D reference batch data as a reference track respectively with the improved DTW algorithm to obtain D synchronization data, and averaging the D synchronization data to obtain a synchronization result of the testing batch data. By adopting the improved DTW algorithm, the search area is limited, and the algorithm efficiency is increased; moreover, the plurality ...

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Номер записи: 40
11-07-2012 дата публикации

Ultrasonic wave wind speed and wind direction measuring device of wind generating set

Номер: CN0102095890B
Автор: ZOU JIANXIAO, XU HONGBING, PENG CHAO, JIANXIAO ZOU, HONGBING XU, CHAO PENG
Принадлежит:

The invention discloses an ultrasonic wave wind speed and wind direction measuring device of a wind generating set, comprising an ultrasonic wave wind speed and wind direction meter and a wind generating set cabin controller, wherein the ultrasonic wave wind speed and wind direction meter comprises an ultrasonic wave transceiver module, a central control unit, a solar energy accumulation power supply module and a ZigBee wireless communication module; the ultrasonic wave transceiver module collects the wind speed and the wind direction under the control of the central control unit; the collected wind speed and wind direction data is sent to the wind generating set cabin controller via the ZigBee wireless communication module so as to control the wind generating set; the solar energy accumulation power supply module supplies power for the whole ultrasonic wave wind speed and wind direction meter by utilizing generated electrical energy; and wireless communication and the solar energy accumulation ...

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Номер записи: 41
04-03-2015 дата публикации

Permanent magnet synchronous motor fault-tolerant control device based on composite speed estimated rotating speed

Номер: CN104393815A
Автор: ZOU JIANXIAO, GE YI, FAN SHICAI, ZHENG HONG, XU HONGBING
Принадлежит:

The invention discloses a permanent magnet synchronous motor fault-tolerant control device based on composite speed estimated rotating speed. After rotating speed omega 2 obtained by estimation through a model reference adaptive method (MRAS) and rotating speed omega 3 obtained by estimation through a high-frequency injection method are subjected to weighted processing, the estimated rotating speed is obtained; prior probabilities obtained based on a maximum likelihood estimation algorithm are inputted into a fault-tolerant control module based on posterior probability to obtain motor vector-controlled feedback rotating speed, accordingly, the goal of improving the dynamic performance of a system is realized, and meanwhile, the effect of steady-state error caused by the method is also reduced.

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Номер записи: 42
12-08-2015 дата публикации

Independent power supply apparatus based on pipeline flow medium pressure driver

Номер: CN104836246A
Автор: ZOU JIANXIAO, LI KAI, ZHANG GANG, ZHENG HONG, XU HONGBING, ZHU YIWEN
Принадлежит:

The invention discloses an independent power supply apparatus based on a pipeline flow medium pressure driver. The driving pressure energy of a high-voltage pipeline flow medium is utilized to drive a generator to work at constant output power, and a rear stage is connected with a rectification module, an inversion module, an energy storage module and an energy balance resistor group module. After the power supply apparatus is started, when the energy of the energy storage module is insufficient, the energy storage module can be utilized for ensuring power balance of a system; and when the energy of the energy storage module is full, the power supply apparatus maintains matched input and output power of the system by use of switching of the energy balance resistor group module, and stable operation of an off-grid system is guaranteed.

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Номер записи: 43
14-07-2023 дата публикации

Inductive current ripple peak value control method for totem-pole bridgeless PFC converter

Номер: CN116436281A
Автор: SHEN ZEWEI, GUO FENG, ZHOU DEHONG, ZOU JIANXIAO, WANG XIN
Принадлежит:

The invention discloses an inductive current ripple peak value control method for a totem-pole bridgeless PFC converter, which is characterized in that on the basis of the inductive current ripple peak value of the totem-pole bridgeless PFC converter, the switching period of a control signal is changed through a technical means of changing the switching frequency, so that the inductive current ripple peak value of the totem-pole bridgeless PFC converter is controlled; specifically, firstly, real-time inductive current ripples with fixed switching frequency are predicted, then the switching period when the inductive current ripples at the next moment are controlled is calculated and determined according to the limiting requirement of the ripple peak value, then a controller generates control signals according to the new switching period, the control signals are sent to a switching tube through a driving module, and the switching tube is switched on and switched off. And completing the control ...

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Номер записи: 44
21-01-2015 дата публикации

Safety belt tension detector and safety belt tension detecting method

Номер: CN104297077A
Автор: ZHENG HEPING, FAN YU, TANG XIAOQING, YU KANGXIONG, ZOU JIANXIAO, FAN SHICAI
Принадлежит:

The invention relates to a tension detector, in particular to a safety belt tension detector and a safety belt tension detecting method. The safety belt tension detector is characterized by comprising a tester main body (1) and a suspension rope (2), wherein buckle rings are arranged at the two ends of the suspension rope (2); a length adjuster (21) is arranged at the middle part of the suspension rope (2); one of the buckle ring bypasses a fixture and is buckled on the length adjuster (21); pull rings are arranged at the two ends of the tester main body (1); the other buckle ring on the suspension rope (2) is connected with one of the pull rings of the tester main body (1); the other pull ring of the tester main body (1) is connected with a to-be-tested safety belt (3). An impact test result is judged on the basis of quantitative indexes, and an ineffective safety belt impact test can be avoided; the impact test result is prompted in various modes, and test records are formed by reading ...

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Номер записи: 45
24-09-2014 дата публикации

Safety helmet identification method integrating HOG human body target detection and SVM classifier

Номер: CN104063722A
Автор: YU KANGXIONG, FAN YU, TANG XIAOQING, ZHENG HEPING, ZOU JIANXIAO, YU LI
Принадлежит:

The invention relates to the field of video monitoring, in particular to a safety helmet identification method integrating HOG human body target detection and an SVM classifier. The method includes the steps that parameter values Sigma of HOG positive and negative sample characteristics, an SVM classification function and a Gaussian kernel function are obtained; a monitoring box is extracted; a moving target is detected; HOG characteristic matching is conducted to judge whether a safety helmet is worn. By means of the safety helmet identification method, whether staff in a construction site wear safety helmets as required can be accurately monitored, the algorithm principle is simple, the real-time performance and a high accuracy rate are achieved, a human body target and a non-human-body target can be effectively distinguished, interference factors in a background are overcome, adaptability to outdoor changing light conditions and changes of colors of the safety helmets is achieved, and ...

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Номер записи: 46
10-06-2015 дата публикации

Face image virtual sample generating method

Номер: CN104700076A
Автор: YU LI, ZHANG HAIBO, ZOU JIANXIAO, XU HONGBING
Принадлежит:

The invention discloses a face image virtual sample generating method. The facial image virtual sample generating method comprises the steps of conducting control point calibration on a source posture face image training sample and a target posture face image training sample, then using a source posture face image training sample set and a target posture face image training sample set as input and output of an RBF neural network, and obtaining an RBF neural network fitting model through training; generating a source coordinate matrix according to source posture face images, inputting the source coordinate matrix into the RBF neural network fitting model to obtain a coordinate transformation matrix, conducting textural feature mapping according to the source coordinate matrix and the coordinate transformation matrix, then conducting interpolation on textural feature deficiency points to obtain a target posture face image virtual sample and finally conducting normalization operation and saving ...

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Номер записи: 47
18-08-2023 дата публикации

Dead beat power distribution control method based on single-stage multi-port inverter

Номер: CN116614029A
Автор: ZHOU DEHONG, DING YU, SHEN ZEWEI, ZOU JIANXIAO
Принадлежит:

The invention discloses a dead-beat power distribution control method based on a single-stage multi-port inverter, relates to the technical field of motor control, and solves the technical problem that a multi-source hybrid electric vehicle is difficult to perform power distribution. The method comprises the following steps: converting the voltage of a three-phase AC motor in a rotating coordinate system into a reference voltage in an alpha-beta coordinate system; filtering the power required by the load through a high-pass filter, and solving a low-frequency component required by the load; solving the action time Tz + of a zero vector according to the low-frequency component, solving the action time of an active vector according to the numerical value of the reference voltage, adjusting the action time Tz + of the zero vector according to the power requirements of different sources, and carrying out deadbeat power distribution; and calculating the on-off state of each switching tube of ...

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Номер записи: 48
16-06-2010 дата публикации

Aeroengine generation control device

Номер: CN0101737171A
Автор: LI KAI, XU HONGBING, ZHENG HONG, ZOU JIANXIAO, KAI LI, HONGBING XU, HONG ZHENG, JIANXIAO ZOU
Принадлежит:

The invention discloses an aeroengine generation control device, which comprises a high speed digital input module, a high accuracy analogue input module, a PWM output module, and a core control module. The high speed digital input module is used for acquiring a rotating speed of a driving shaft of an aeroengine generating set and pulse signals of which the frequency is higher than 100kHz; the high accuracy analogue input module is used for acquiring generated power of the aeroengine generating set and valve displacement of a fuel regulating valve with the accuracy higher than 0.0001; the PWM output module is used for outputting control quantity through an algorithm which is controlled by a PWM current to the fuel regulating valve so as to control the valve opening; and the core control module comprises a self-adaptive fuzzy PID control module for controlling the rotating speed, the power and the valve displacement. The aeroengine generation control device controls the rotating speed, the ...

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Номер записи: 49
23-09-2015 дата публикации

Abnormal state detection method of medium and high density crowd

Номер: CN104933412A
Автор: YU LI, ZHANG GE, ZOU JIANXIAO, XU HONGBING
Принадлежит:

The invention discloses an abnormal state detection method of a medium and high density crowd. The abnormal state detection method comprises the following steps: firstly, extracting and tracking feature points, and calculating the speed of each feature point according to the coordinates of the feature point in a previous frame of surveillance video image and a current frame of surveillance video image; then, adopting diagram analysis to obtain behavior consistency among the feature points, ejecting discrete points on the basis of the behavior consistency, and clustering the residual feature points; calculating the crowd aggregation degree, the crowd movement strength and the crowd movement direction variance of all feature points in a cluster; and according to the three parameters in multiple frames of surveillance video images and the amount and the amplification of the crowd cluster, judging the abnormal state of the crowd. The abnormal state detection method carries out crowd state analysis ...

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Номер записи: 50
26-03-2014 дата публикации

Harmonic selection and capacity limitation control method for active power filter

Номер: CN103683293A
Автор: XIE CHUAN, ZOU JIANXIAO, ZHENG HONG, LI KAI, XU HONGBING
Принадлежит:

The invention discloses a harmonic selection and capacity limitation control method for an active power filter. The control method comprises the following steps of acquiring load current signals and extracting each sub-harmonics signal of a load; according to each sub-harmonics signal of the load, calculating a current command signal, and then constituting a modulation signal by using the acquired grid voltage, the input current and the direct current side voltage of the active power filter; and finally, generating a PWM switching signal to control a switching tube of the active power filter. The selective harmonic compensation of the active power filter and the capacity limitation running when the capacity of the active power filter is less than the load harmonics can be realized, and the overload running of the active power filter is prevented, so that the performance of the active power filter and the adaptability of the active power filter under complex ad grid conditions can be greatly ...

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Номер записи: 51
25-06-2014 дата публикации

Multi-scale superpixel-fused target tracking method

Номер: CN103886619A
Автор: ZHOU XUE, ZOU JIANXIAO, XU HONGBING, LI WENRU
Принадлежит:

The invention discloses a multi-scale superpixel-fused target tracking method. Through the method, a more accurate target confidence map can be obtained by constructing a superpixel-based discriminant appearance model, and consequently the target tracking accuracy degree and robustness are effectively improved. Specifically, the method includes the first step of adopting superpixel classification results with different scales to vote for properties of one pixel point and then obtaining the more accurate target confidence map, and the second step of updating the appearance model by continuously updating a classifier so that the appearance model can continuously adapt to scenes such as illumination changes and complicated backgrounds. Consequently, more accurate and robust tracking can be achieved.

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Номер записи: 52
11-04-2023 дата публикации

Three-level inverter pulse delay compensation system and method based on ripple prediction

Номер: CN115955138A
Автор: SHEN ZEWEI, SONG XILU, ZHOU DEHONG, ZOU JIANXIAO, WEI HANG
Принадлежит:

The invention discloses a three-level inverter pulse delay compensation system and method based on ripple prediction, and the method comprises the steps: collecting a low-frequency current ix of each phase bridge arm of a three-level inverter through a current sampling module, and predicting a high-frequency ripple current iris (k) in each segment of a current switching period through a bridge arm current ripple prediction module; and then superimposing the ix and the critical (k) through a bridge arm voltage edge delay calculation module, screening out a bridge arm current critical corresponding to a bridge arm voltage rising edge moment and a bridge arm current ifalse corresponding to a bridge arm voltage falling edge moment from a superimposed result, and substituting the bridge arm current critical and the bridge arm current ifalse into a bridge arm voltage switch edge delay function to obtain a bridge arm voltage switch edge delay function. And the rising edge delay compensation time ...

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Номер записи: 53
07-05-2014 дата публикации

Body contour reconstruction method based on dynamic time-space information digging

Номер: CN103778439A
Автор: ZHOU XUE, ZOU JIANXIAO, XU HONGBING
Принадлежит:

The invention discloses a body contour reconstruction method based on dynamic time-space information digging. An inquiry sequence is built by connecting a body contour test sample and test samples of preceding frames; shape descriptors of samples in the inquiry sequence and samples in a known human body exercise training sample sequence are extracted in a non-negative matrix factorization method; cost matrixes of the inquiry sequence and the training sample sequence are calculated according to the shape descriptors; an accumulated cost matrix is calculated through the cost matrixes; subscripts of tail end points of optimal sub-sequences are determined according to elements of the accumulated cost matrix; subscripts of starting points are obtained in a optimal regular path algorithm and accordingly alternative optimal sub-sequences are obtained; by means a preset threshold value, the ultimate optical sub-sequences are screened out; ultimately, according to the samples of the tail end points ...

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Номер записи: 54
14-05-2014 дата публикации

Underground worker target tracing method based on scene information mining

Номер: CN103793715A
Автор: ZOU JIANXIAO, ZHOU XUE, XU HONGBING, CAI SHIBIN, LI XIN
Принадлежит:

The invention discloses an underground worker target tracing method based on scene information mining. Self-adaptation multidimensional Gaussian background modeling is carried out on an underground grey level image to obtain a background estimation image, the background deduction is carried out on the underground grey level image according to the background estimation image to obtain a moving target area, the light spot moving area is eliminated by judging whether the rising degree of the cross correlation coefficient between the moving target area and the background estimation image before and after filling of light spots is larger than the preset threshold value or not, the particle filter tracing is carried out on the worker moving area to obtain a target tracing result, shadow pixels in the target tracing result are removed through a shadow mask, the size of a foreground frame is optimized through a vertical projection method, and an ultimate target tracing result is obtained. The scene ...

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Номер записи: 55
16-05-2023 дата публикации

Photoetching machine workpiece table motion control method

Номер: CN116125785A
Автор: PENG CHAO, WANG JIANYU, SUN JIAWEI, ZOU JIANXIAO, HE JIAN
Принадлежит:

The invention discloses a photoetching machine workpiece table motion control method, and belongs to the field of precise motion control. Comprising the following steps: setting a current loop and a speed loop of a motion servo system of a photoetching machine workpiece table as generalized controlled objects; setting a position ring as nonlinear active-disturbance-rejection control to perform feedback control on the position of the generalized controlled object; and model-free adaptive iterative learning optimization and switching feedforward control are introduced into feedback control so as to realize control of the motion servo system. According to the method, the design difficulty and the modeling complexity of the control motion servo system are reduced at the same time, disturbance borne by the system is estimated and compensated through introduced model-free adaptive iterative learning optimization and switching feedforward control, the positioning precision and the tracking precision ...

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Номер записи: 56
26-01-2011 дата публикации

Novel method of wind generating set remote maintenance

Номер: CN0101303592B
Автор: JIANXIAO ZOU, HONGBING XU, ZOU JIANXIAO, XU HONGBING
Принадлежит:

A new method for remote maintenance of a wind generating set relates to an automatic control of the wind power generation. Under the control of a remote maintenance software of a wind driven generator, a remote parameter configuration program module, a remote upgrading program module and a remote flow control program module which are installed in a controller of the wind driven generator are adopted to realize the remote configuration of working parameters of the wind driven generator, the remote upgrading of a controller program of the wind driven generator and the flow control of the wind driven generator. The method of the invention realizes the remote upgrading of controller program software of the wind driven generator, remote flow control and remote parameter configuration, thus dramatically improving the maintenance efficiency and maintenance effect of the wind driven generator and is convenient and reliable for usage and is easy to popularize.

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Номер записи: 57
12-08-2015 дата публикации

LCL filter parameter designing method based on three-level SVPWM grid-connected inverter

Номер: CN104836425A
Автор: LI KAI, ZOU JIANXIAO, ZHENG HONG, LUO QI, LIANG ZHENGFENG, XU HONGBING
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The invention discloses an LCL filter parameter designing method based on a three-level SVPWM grid-connected inverter. For each group of LCL filter parameters within a given LCL filter parameter scope, by use of a three-level SVPWM modulation method, through a Fourier series analysis, the size of a current harmonic wave distortion rate during grid connection at each time, whether the requirement for a grid connection current harmonic wave distortion rate in an IEEE519 grid connection standard is met is determined, and for the LCL filter parameters which are within the given LCL filter parameter scope and meet the requirement, a parameter with the minimum total induction is selected as an LCL filter parameter designed by use of the method provided by the invention.

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Номер записи: 58
11-03-2015 дата публикации

Electric vehicle based real-time scheduling method for power balance of wind power generation microgrid

Номер: CN104410089A
Автор: LI LIYING, WU XIAOLING, ZOU JIANXIAO, XU HONGBING
Принадлежит:

The invention discloses an electric vehicle based real-time scheduling method for power balance of a wind power generation microgrid. The method is characterized in that a scheduling device calculates the minimum charge state of each electric vehicle battery according to next driving distance of each user when the user vehicle accesses, and divides the electric vehicles into three types including charging service, discharging service and charging or discharging service according to the current charge states of the electric vehicles; the scheduling device acquires the generated power and load power of a wind power generation microgrid system and determines whether scheduling is required, if scheduling is required, the scheduling device further determines whether charging scheduling or discharging scheduling is required and then corresponding types of electric vehicles are selected for scheduling, so that defects about the charging power or load power are overcome. The charge-discharge functions ...

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Номер записи: 59
15-08-2023 дата публикации

Abnormality detection method of asymmetric auto-encoder based on knowledge distillation

Номер: CN116597203A
Автор: YU LI, WU BUWEI, LIU JIANQIN, PENG CHAO, ZOU JIANXIAO
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The invention provides an anomaly detection method for an asymmetric auto-encoder based on knowledge distillation, and aims to reduce reconstruction error failure, the number of decoding networks of the auto-encoder is smaller than that of convolution kernels of the encoder, and an asymmetric structural form is formed. The asymmetric structure design can greatly reduce the parameter quantity of the self-encoding network, and the problem of reconstruction error failure caused by too strong model generalization is avoided to a certain extent. A self-encoder and a knowledge distillation algorithm are combined, network training is performed by adopting a knowledge distillation method, and while network parameters are reduced, the strong feature extraction capability of a teacher network is utilized to guide a student network and improve the feature reconstruction capability of the student network. In order to enable an encoder serving as a teacher network to completely distill knowledge to ...

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Номер записи: 60
03-06-2015 дата публикации

Decomposition method for dither signal in high speed serial communication

Номер: CN104679698A
Автор: ZOU JIANXIAO, XIAO JUN, FAN SHICAI, XU HONGBING
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The invention discloses a decomposition method for a dither signal in high speed serial communication. Firstly the dither signal is separated by an amplitude standard deviation and a amplitude maximum of the signal to be dithered; according to information obtained by separation, amplitude range and frequency range of to-be-added white noise are determined, and amplitudes and frequency components of to-be-added sinusoidal signals are determined; N white noise signals are randomly generated in the amplitude range and the frequency range of the white noise, two groups of sinusoidal signals are generated, each white noise signal and the groups of sinusoidal signals are together added into the dither signal, EMD decomposition is respectively performed on two obtained signals, obtained mode components are averaged to obtain one mode component corresponding to each white noise signal, and the mode components obtained by N times are averaged to obtain a final mode component. According to the decomposition ...

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Номер записи: 61
08-04-2015 дата публикации

SVM (support vector machine) algorithm-based driver intention recognition method

Номер: CN104494600A
Автор: XIN XIAOSHUAI, WANG YILIN, ZOU JIANXIAO, XU HONGBING
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The invention discloses an SVM (support vector machine) algorithm-based driver intention recognition method. The method includes classifying categories of driver intention types, performing data collection according to the classified categories, classifying and numbering collected data by numbers, determining characteristic values and driver intention categories, subjecting the collected data to a dimension reduction process by a PCA (principal component analysis) method, selecting a proper kernel function to map a characteristic vector into a high-dimensional space to enable inseparable data to be separated from one another, subjecting parameters to training and off-line verification by a pre-classified SVM model, and finally, recognizing driver intention according to the data collected in real time. Thus, a recognition process is simplified, recognition error rate is decreased and vehicle-mounted safety is improved.

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Номер записи: 62
10-09-2014 дата публикации

Double-fed wind power plant dynamic equivalence modeling method suitable for active power characteristic analysis

Номер: CN104036073A
Автор: PENG CHAO, ZOU JIANXIAO, XU HONGBING, XIN XIAOSHUAI, YAN YAN
Принадлежит:

The invention discloses a double-fed wind power plant dynamic equivalence modeling method suitable for active power characteristic analysis. According to the method, five indexes which can reflect DFIG active power dynamic characteristics are selected, active power output characteristics indexes of all DFIGs are collected in real time to form data objects, different clustering numbers are set, a fuzzy C-mean clustering algorithm is adopted for clustering the data objects, Xie-Beni indexes of clustering results through the different clustering numbers are calculated, the clustering number corresponding to the minimum Xie-Beni index is selected as the optimal clustering number, the corresponding clustering result is the grouping result of the DFIGs, and according to the grouping result of the DFIGs, equivalent aggregation is performed on parameters of the DFIG and a current collection system in the same group to obtain a double-fed wind power plant equivalence model. Factors affecting DFIG ...

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Номер записи: 63
21-07-2023 дата публикации

Dynamic dead zone adjusting method of high-frequency resonant converter

Номер: CN116470747A
Автор: SHEN ZEWEI, JEON IN-CHUL, ZHOU DEHONG, ZOU JIANXIAO, WANG JIAN
Принадлежит:

The invention discloses a dynamic dead zone adjusting method of a resonant converter, which comprises the following steps of: firstly, acquiring input voltage and output current of a high-frequency resonant converter under different working conditions, then carrying out time domain analysis modeling by combining the topology type of the high-frequency resonant converter to obtain turn-off current, and simultaneously calculating equivalent junction capacitance values of the high-frequency resonant converter under different working conditions; the method comprises the steps that firstly, a data manual of the high-frequency resonant converter is combined, expected dynamic dead time of the high-frequency resonant converter under different working conditions is fitted through a software tool matlab, finally, the expected dynamic dead time is corrected to establish a lookup table, and then real-time dynamic dead time adjustment of the high-frequency resonant converter is achieved by means of ...

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Номер записи: 64
28-07-2023 дата публикации

Device for eliminating output current ripples at alternating current side of inverter

Номер: CN116505786A
Автор: SHEN ZEWEI, WANG DAIXIN, XIONG JUNLONG, ZHOU DEHONG, ZOU JIANXIAO, WEI HANG
Принадлежит:

The invention discloses an inverter alternating current side output current ripple elimination device, which is characterized in that a sampling hold circuit samples noise voltage of a power inductor in real time, and the noise voltage passes through a passive filtering hold circuit to obtain a scaling differential mode current with a ZL in a scaling differential mode current generator; the scaling differential-mode current generates a voltage which is the same as the differential-mode current in waveform and reverse to the differential-mode current through an R6 in the scaling differential-mode current generator, the voltage generates a voltage signal with constant voltage amplitude and increased output capability after passing through a reverse current injection power amplifier, and the voltage injects reverse noise current into a load input end through a load R11. The high-voltage follower circuit provides a path for current injected by the power amplifier and converts noise current ...

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Номер записи: 65
24-09-2014 дата публикации

Wind-diesel-battery microgrid frequency control method

Номер: CN104065105A
Автор: PENG CHAO, ZOU JIANXIAO, XU HONGBING, XIN XIAOSHUAI, WU JIA
Принадлежит:

The invention discloses a wind-diesel-battery microgrid frequency control method, which comprises firstly predicting power to obtain a load predicted value per second and a power predicted value of wind power generation in a prediction period, distributing power to a wind driven generator and a diesel generator according to predicted values to obtain set power values, adopting the difference between each set power value and the corresponding real-time output power value as input and adopting power adjustment amounts as output, and obtaining the power adjustment amounts by a fuzzy control strategy; adopting an active-disturbance-rejection controller, using the deviation values of real-time frequency values relating to rated frequency values, [delta]fref = 0, as set values, observing influence of disturbance on frequency fluctuation by an extended state observer and compensating the frequency in real time, and thereby enabling the frequency of a wind-diesel-battery microgrid to be stable ...

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Номер записи: 66
02-09-2015 дата публикации

LLCL filtering-based active power filter compound control method

Номер: CN104882886A
Автор: ZHANG GANG, LI KAI, ZHENG HONG, ZOU JIANXIAO, XU HONGBING, HE DONG
Принадлежит:

The invention discloses an LLCL filtering-based active power filter compound control method. Unstable pole locations of an LLCL filter are configured through inherent time delay of a digital system, so that non-damping resistance self-stabilized control of the LLCL filter is realized. The LLCL filter is connected with a power grid directly in specified configuration, so that total induction volume is reduced, system cost and harmonic wave output capability are decreased. Also, addition loss of traditional passive damping and that active damping needs external sensors or is affected by model precision are avoided. The compound control method is very suitable for being applied to large power inverters.

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Номер записи: 67
18-06-2014 дата публикации

Open-circuit fault detection method for three-phase inverter with phase-redundant fault-tolerant structure

Номер: CN103869208A
Автор: FAN SHICAI, LIU XIAOLONG, ZOU JIANXIAO, XU HONGBING
Принадлежит:

The invention discloses an open-circuit fault detection method for a three-phase inverter with a phase-redundant fault-tolerant structure. The method comprises the following steps: normalizing a three-phase expected voltage to obtain a detection variable (dn) of the three-phase expected voltage; calculating to obtain a detection variable (an) according to an average value of an absolute value of the three-phase expected voltage; judging to obtain fault indications (Dn and An) through threshold values (km and kd) of the detection variable (dn) and the detection variable (an); searching and locating a switch tube having an open-circuit fault in a fault location table I according to the fault indications (Dn and An). Faults with three possibilities in the fault location table I can be further located by using a method of replacing a bridge arm, on which the switch tube determined to have the open-circuit fault is positioned, with a redundant fourth bridge arm. The method is applied to open-circuit ...

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Номер записи: 68
12-08-2015 дата публикации

Random frequency pulse width modulation method for active power filter

Номер: CN104836555A
Автор: ZOU JIANXIAO, XIE CHUAN, LI KAI, ZHENG HONG, XU HONGBING, LE HUANHUA
Принадлежит:

The invention discloses a random frequency pulse width modulation method for an active power filter, wherein the method is characterized by storing a group of random numbers, which meet the requirement and which are distributed evenly in advance, then periodically and repeatedly calling the group of random numbers to generate switching frequencies which are evenly distributed in a wider range. The method of the invention overcomes the shortcoming that the storage space is required to be large through periodically and repeatedly calling. The method of the invention is easy to realize through engineering approaches and can be used for uniformly distributing voltage and current harmonic component and electromagnetic radiation of the active power filter in a wider frequency range ultimately.

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Номер записи: 69
12-08-2015 дата публикации

H-infinity repetition control method of active power filter

Номер: CN104836231A
Автор: ZHANG GANG, XIE CHUAN, ZHENG HONG, ZOU JIANXIAO, XU HONGBING, LIU SONG
Принадлежит:

The invention discloses an H-infinity repetition control method of an active power filter. Through control of an H-infinity controller, the active power filter, when the inductance wide range of LCL filter inductors L1 and L2 changes, especially when the change of inductance values is quite small, can still maintain controls stability, secondly, the defect of low control precision of an H-infinity robustness controller is made up for through a repetition controller, and the compensation effect of current harmonic waves is improved, such that the robustness stability and the anti-interference capability of a whole power network system are enhanced.

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Номер записи: 70
25-03-2015 дата публикации

Fire fighting access safety detection method based on self-adaptation background study

Номер: CN104463253A
Автор: ZHOU XUE, ZOU JIANXIAO, XU HONGBING, YANG WU
Принадлежит:

The invention discloses a fire fighting access safety detection method based on the self-adaptation background study. First N frames of images of a fire fighting access monitoring video stream serve as training samples to obtain a Gaussian mixture model after training. A background image is obtained according to the Gaussian mixture model. Background shearing is carried out on a detected image through the background image to extract the foreground area of the detected image. Whether the foreground area is the true foreground or other fake foreground caused by interference is judged through the HOG feature vector of the images, in the foreground area, of the foreground image and the detected image, and therefore whether abnormal conditions exist in the detected image is detected. If M continuous frames have abnormal conditions, a fire fighting access has a safety problem. The fire fighting access safety detection method based on the self-adaptation background study realizes accurate detection ...

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Номер записи: 71