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Robust H_∞ filtering for discrete-time systems with Markovian switching and time-delays

Journal of Systems engineering and Electronics 2009年第5期20卷 1072-1080页

作者： Yao Xiuming Zhao Fu Ling Mingxiang Wang Changhong Space Control and Inertia Technology Research Center Harbin Inst. of Technology Harbin 150001 P. R. China School of Science and Engineering North China Electric Power Univ. Beijing 102206 P. R. China

The robust H∞ filtering problem for uncertain discrete-time Markovian jump linear systems with mode- dependent time-delays is investigated. Attention is focused on designing a Markovian jump linear filter that ensures robust stochastic stability while achieving a prescribed H∞ performance level of the resulting filtering error system, for all admissible uncertainties. The key features of the approach include the introduction of a new type of stochastic Lyapunov functional and some free weighting matrix variables. Sufficient conditions for the solvability of this problem are obtained in terms of a set of linear matrix inequalities. Numerical examples are provided to demonstrate the reduced conservatism of the proposed approach.

关键词： discrete-time Markovian jump linear system robust H∞ filtering mode-dependent delay linear matrix inequality.

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A Load-Current Feed-Forward control Method of TAB with Fast Regulation Ability 16th

A Load-Current Feed-Forward Control Method of TAB with Fast ...

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16th Annual Conference of China Electrotechnical Society, ACCES 2021

作者： Tu, Chunming Yuan, Shuyuan Xiao, Fan Liu, Bei Yu, Xueping Guo, Qi Liu, Jie National Electric Power Conversion Control Engineering Technology Research Center Hunan University Changsha410082 China

ISBN: (纸本)9789811915314

Aiming at the problems of large output voltage overshoot and long adjustment time caused by port power coupling during the dynamic power regulation process of Triple Active Bridge (TAB) converter under the load switching application, this paper proposes a load-current feed-forward control method based on decoupling network, which has the advantages of faster dynamic response and higher control precision. Firstly, the power transmission characteristics between ports of TAB converter are analyzed. The power coupling characteristics between ports are analyzed by establishing the load current small signal model, and the diagonal decoupling network matrix is derived. Then the decoupling matrix is added to the load-current feed-forward control loop, and the load-current feed-forward controller based on the decoupling network is designed. The stability of the control strategy is analyzed by transfer function and Bode diagram. Finally, the simulation model of TAB converter is built in Matlab/Simulink simulation environment, and the correctness and effectiveness of the control strategy proposed in this paper are verified by simulation. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Bode diagrams

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research on reliability of multi-channel distributed intelligent distribution architecture 3

Research on reliability of multi-channel distributed intelli...

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3rd International Academic Exchange Conference on Science and technology Innovation, IAECST 2021

作者： Zheng, Sha Liu, Zhen Shi, Junbiao Li, Ly Si, Xueyuan Liu, Wenyang Beijing Spacecraft China Technology Corporation Control Engineering Aerospace Science Beijing Space Power ConversionResearch Center Beijing100094 China

ISBN: (纸本)9781665402675

Aerospace high reliability complex power supply and distribution products are an important part of satellite system, and their reliability is related to the safety of the whole satellite and ship. The traditional task planning and health management take remote control and telemetry as the main means to complete the on orbit operation status monitoring and management of the system by telemetering the characteristic parameters of the power supply and distribution unit. The traditional on-board test equipment and corresponding parameters of the distribution path defined by the hardware connection increase significantly with the expansion of the system. Conventional distribution path design has low margin in technical indicators such as maintainability, scalability and reliability, as well as software definable. This paper decouples the traditional architecture of existing hardware defined distribution path. A variety of different levels of electrical equipment are integrated in a small volume at the same time. In order to avoid permanent damage to the power supply and distribution bus caused the fault of electrical equipment connected to the power network. The fault was removed and avoided to complete the reliability calculation of the architecture. The architecture design ensure the distribution of power for the key loads completed by the core tasks, which has become the forward direction of aerospace reliability under the new development situation. © 2021 IEEE.

关键词： Remote control

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Optimization Study for the Influence of Parasitic Parameters in Aerospace power Supply Based on GaN

Optimization Study for the Influence of Parasitic Parameters...

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power Electronics and Application Symposium (PEAS), IEEE International

作者： Cheng Peng Yonggang Chen Shubo Zhi Mingming Ji Huiyao Li Zhipo Ji Beijing Spacecrafts China Academy of Space Technology Beijing Space Power Conversion and Control Engineering Research Center Beijing China

Gallium Nitride (GaN) power devices are conducive to the development of high-frequency and high-efficiency of aerospace power supply. However, the inevitable parasitic parameters in the circuit are easy to cause oscillation and lead to the deterioration of circuit reliability. An active clamp forward DC/DC converter with parasitic parameters is proposed, using GaN power device as the main switch to improve the switching frequency and efficiency of the power supply. The main operating modes of the circuit are deduced theoretically, and the topology of the circuit containing three kinds of parasitic inductors is analyzed dynamically by simulation. Finally, according to the simulation results, the optimization measures for the parasitic parameters causing different oscillation problems are proposed. An experimental prototype is designed and experimentally tested, proved the effectiveness of the suppression methods. Promote the high-reliability application of GaN power devices in aerospace power supply.

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research on the Principle of Fast Amplitude Measurement Based on AC Surge Voltage Test

Research on the Principle of Fast Amplitude Measurement Base...

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Electronics and Electrical engineering technology (EEET), International Conference on

作者： Mi Liu Junbiao Shi Tao Ma Xiong He Li Wang Mingming Ji Beijing Space Power Conversion and Control Engineering Research Center Beijing Spacecrafts Ltd Beijing

The airborne equipment of civil aviation airliner has high requirements for rapid measurement of voltage transient process, and accurate AC voltage test is required. The common AC voltage RMS measurement method is mainly realized by the voltage transformer cooperating with the true RMS chip. However, if the compensation capacitance of the true RMS chip is larger, the transient overshoot of the power supply output voltage will be too large due to the delay; The capacitance value is small, the collected signal ripple is large, and the accuracy will be affected. In this paper, a method is proposed to quickly measure the amplitude of the angle between the sinusoidal AC two-point voltage and the phase. By sampling different phase amplitudes, the variable speed integration method is used to realize the fast and accurate response of the output voltage. The feasibility and practicability of this innovative principle are verified by the prototype test of design principle.

关键词： Semiconductor device measurement Time-frequency analysis Voltage measurement power measurement power supplies Voltage transformers Capacitance

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research on damping addition and vibration reduction technology of frame aerospace electronic chassis 3

Research on damping addition and vibration reduction technol...

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2020 3rd International Symposium on power Electronics and control engineering, ISPECE 2020

作者： Yu, Zhang Bolin, Zhang Beijing Satellite Manufacturing Co. LTD China Beijing Space Power Supply Transformation and Control Engineering Research Center Beijing100080 China

This paper poses a box instrumentation in aerospace electronic chassis TO-5 encapsulation relay under the action of impact environmental load state of reverse fault mode, by reasonable single frames of viscoelastic damping materials added, increasing box style structure between the PCB mechanical installation interface damping ratio and frequency ratio, finally realizes the transfer rate is reduced, achieve instrumentation relay PCB, lower impact acceleration response. By adding damping cushion to the frame machine installation interface, the load transfer path of impact mechanics is optimized to reduce the installation stiffness and change the fundamental frequency characteristics of the whole machine. © Published under licence by IOP Publishing Ltd.

关键词： Polychlorinated biphenyls

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Optimal bidding strategy for virtual power plants considering the feasible region of vehicle-to-grid

Energy Conversion and Economics

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Energy conversion and Economics 2020年第3期1卷 238-250页

作者： Wang, Zihan Gao, Jie Zhao, Ruina Wang, Jianxiao Li, Gengyin School of Electrical and Electronic Engineering North China Electric Power University Beijing China China Automotive Technology and Research Center Co. Ltd Tianjin China National Power Dispatching and Control Center Beijing China

With the rapid development of vehicle-to-grid (V2G) technology, the use of the internet of things and advanced information technology to achieve the optimal dispatch of large-scale plug-in electric vehicles (PEVs) has become an important focus of scientific research and engineering practice worldwide. In order to achieve a balance between mass distributed energy resources and the secure and economic operation of the power grid, the authors propose an optimal market bidding strategy for a virtual power plant considering the feasible region of V2G. A detailed battery model considering the V2G mode of PEVs is established. A two-stage stochastic optimisation model for the virtual power plant considering massive volumes of PEVs is built, taking into account the day-ahead market revenue and the costs brought about by real-time market deviations. Three bidding strategies—PEVs charging immediately after arrival, without V2G, and considering V2G—are compared using case studies to demonstrate the efficiency and effectiveness of the proposed strategy. Through the complete interaction between PEVs and the virtual power plant, this V2G-based strategy can coordinate distributed energy resources, promote the accommodation of renewable energy, and significantly improve the economy of the virtual power plant operation. © 2020 The Authors. Energy conversion and Economics published by John Wiley & Sons Ltd on behalf of The Institution of engineering and technology and the State Grid Economic & Technological research Institute Co., Ltd.

关键词： Virtual power Plants

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Effects of external parameters on plasma characteristics and uniformity in a dual cylindrical inductively coupled plasma

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Plasma Science and technology 2024年第12期26卷 63-74页

作者： Pengyu WANG Siyu XING Daoman HAN Yuru ZHANG Yong LI Cheng ZHOU Fei GAO Younian WANG Key Laboratory of Materials Modification by Laser Ionand Electron Beams(Ministry of Education)School of PhysicsDalian University of TechnologyDalian 116024People’s Republic of China Lab of Advanced Space Propulsion and Beijing Engineering Research Center of Efficient and Green Aerospace Propulsion Technology Beijing Institute of Control EngineeringBeijing 100190People’s Republic of China

The dual cylindrical inductively coupled plasma source,compared to the conventional structure of inductively coupled plasma source,can significantly improve the uniformity of *** has an enhanced potential for application in processes,such as etching and ashing.A uniform plasma can be obtained by allowing the remote plasma from the upper chamber modulate the main plasma generated in the lower *** this study,a fluid model was employed to investigate a dual cylindrical inductively coupled Ar/O_(2)*** effects of external parameters on electron density,electron temperature,O atomic density,and plasma uniformity in the main chamber were studied,and the reasons were *** results of this study show that remote power can control the plasma uniformity and increase the plasma density in the main *** the remote power increased,plasma uniformity improved initially and then *** main power affected the plasma density at the edge of the main chamber and can modulate the plasma density in the main *** gas pressure affected both the uniformity and density of the *** the gas pressure increased,the plasma uniformity deteriorated,but the free radical density improved.

关键词： dual inductively coupled plasma remote plasma plasma uniformity fluid model

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Experimental investigation of the electromagnetic effect and improvement of the plasma radial uniformity in a large-area,very-high frequency capacitive argon discharge

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Plasma Science and technology 2021年第5期23卷 66-74页

作者： Daoman HAN Zixuan SU Kai ZHAO Yongxin LIU Fei GAO Younian WANG Lab of Advanced Space Propulsion and Beijing Engineering Research Center of Efficient and Green Aerospace Propulsion Technology Beijing Institute of Control EngineeringBeijing 100190People’s Republic of China Key Laboratory of Materials Modification by Laser Ionand Electron Beams(Ministry of Education)School of PhysicsDalian University of TechnologyDalian 116024People’s Republic of China

We performed an experimental investigation on the electromagnetic effect and the plasma radial uniformity in a larger-area, cylindrical capacitively coupled plasma reactor. By utilizing a floating hairpin probe, dependences of the plasma radial density on the driving frequency and the radio-frequency power over a wide pressure range of 5-40 Pa were presented. At a relatively low frequency(LF, e.g. 27 MHz), an evident peak generally appears near the electrode edge for all pressures investigated here due to the edge field effect, while at a very high frequency(VHF, e.g.60 or 100 MHz), the plasma density shows a sharp peak at the discharge center at lower pressures, indicating a strong standing wave effect. As the RF power increases, the center-peak structure of plasma density becomes more evident. With increasing the pressure, the standing wave effect is gradually overwhelmed by the ‘stop band’ effect, resulting in a transition in the plasma density profile from a central peak to an edge peak. To improve the plasma radial uniformity, a LF source is introduced into the VHF plasma by balancing the standing wave effect with the edge effect. A much better plasma uniformity can be obtained if one chooses appropriate LF powers, pressures and other corresponding discharge parameters.

关键词： electromagnetic effect plasma radial uniformity very-high-frequency capacitively coupled plasmas

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Fluid simulation of the effect of a dielectric window with high temperature on plasma parameters in inductively coupled plasma

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Plasma Science and technology 2023年第3期25卷 51-61页

作者：李娜韩道满张权治刘旭辉王英杰王友年 Key Laboratory of Materials Modification by Laser Ionand Electron Beams(Ministry of Education)School of PhysicsDalian University of TechnologyDalian 116024People’s Republic of China Lab of Advanced Space Propulsion and Beijing Engineering Research Center of Efficient and Green Aerospace Propulsion Technology Beijing Institute of Control EngineeringBeijing 100190People’s Republic of China

To maintain the high-density plasma source in inductively coupled plasma(ICP),very high radiofrequency power is often delivered to the antenna,which can heat the dielectric windows near the antenna to high *** high temperature can modulate the plasma characteristics to a large *** thus study the effect of dielectric window temperature on plasma parameters in two different ICP structures based on COMSOL *** distributions of various plasma species are examined at different dielectric window *** concentration of neutral gas is found to be largely modulated at high dielectric window temperature,which further affects the electron collision probability with neutrals and the electron ***,the electron density profiles are barely affected by the dielectric window temperature,which is mainly concentrated at the center of the reactor due to the fixed power input and pressure.

关键词： fluid simulation metastable argon dielectric window temperature inductively coupled plasma

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