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2016 IEEE/CSAA International Conference on Aircraft Utility systems, AUS 2016

作者： Huijun, Jiang Cheng, Qin Yaoxing, Shang Xiaochao, Liu Department of Flight Control and Hydraulic System AVIC the First Aircraft Institute Xi'an710089 China School of Automation Science and Electrical Engineering Beihang University Beijing100191 China

ISBN: (纸本)9781509010875

This paper presents the system works, solution of the limited hydraulic source with the velocity inner loop, and the system optimal design method of reduction ratio. Through modeling and simplifying the system, the static and dynamic characteristics are analyzed, and the selecting requirements of affecting its parameters are proposed. A method is raised to reduce the peak pressure of the hydraulic drive unit (PDU) inlet and outlet pipes and its internal motor. © 2016 IEEE.

关键词： Design

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Observer-based fault detection for affine nonlinear systems with disturbances and uncertainties 35

Observer-based fault detection for affine nonlinear systems ...

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第35届中国控制会议

作者： HAN Huayun YANG Ying LI Linlin Chen Yu State Key Laboratory for Turbulence and Complex Systems Department of Mechanics and Engineering ScienceCollege of Engineering Peking University School of Automation and Electrical Engineering University of Science and Technology Beijing the Institute for Automatic Control and Complex Systems (AKS) University of Duisburg-Essen Beijing Institute of Astronautics System Engineering

ISBN: (纸本)9781509009107

This paper is concerned with the integrated design schemes of L observer-based fault detection（FD） systems for affine nonlinear processes with disturbances and uncertainties,*** this end,a so called L observer-based FD scheme is studied ***,the integrated design approaches for nonlinear systems with disturbances and uncertainties are addressed,*** the end,examples are given to illustrate the effectiveness of the proposed approaches.

关键词： Robust Fault Detection Observer Design Affine Nonlinear systems

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Data-driven Unfalsification based Robust Fault Tolerant control 35

Data-driven Unfalsification based Robust Fault Tolerant Cont...

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第35届中国控制会议

作者： Ma Weize Li Xiaocheng Wang Jingcheng Wang Bohui Lin Hai National Engineering and Research Center for Commercial Aircraft Manufacturing Commercial Aircraft Corporation of China Ltd Department of Automation Shanghai Jiao Tong Universityand Key Laboratory of System Control and Information ProcessingMinistry of Education of China

ISBN: (纸本)9781509009107

The paper combined the unfalsified control(UC) which is a data-driven method and Youla parameterization for fault-tolerant control(FTC).The controller reconstruction of the FTC method uses the Youla parameterization for handling with faulty *** is a passive and model-free FTC method without know about plant models or faults *** candidate controller structure is pre-designed by the prior information,and then the FTC is done through tuning Youla parameter without changing the controller *** UC-FTC is done by the following three steps:design of candidate controllers,performance monitor,switching and *** method also provides an finite controller set to seek for the best performance by unfalsified ***,the UC-FTC method is applied to a MIMO system.

关键词： unfalsified control Youla parameterization fault-tolerant control

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Regional pole placement and feedback linearization of nonlinear wind turbine control system

Regional pole placement and feedback linearization of nonlin...

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American control Conference

作者： Zhongwei Lin Zhenyu Chen Xiaoming Li the State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources School of Control and Computer Engineering North China Electric Power University Beijing 102206 P. R. China the School of Automation Engineering Northeast Electric Power University Jilin 132012 P. R. China

ISBN: (纸本)9781509045839

This paper combines the regional pole placement technique with the geometric control theory to design the feedback control for the nonlinear wind turbine generator system (WTGS), which can improve the dynamic response efficiently. Through constructing the appropriate diffeomorphism and feedback linearization, the key variables of the original nonlinear WTGS can be remained in the transformed linear-form system, which sustains that the dynamic response could be adjusted in the transformed linear framework. Due to the multi-input multi-output (MIMO) and high-order characteristics, the regional pole placement technique is then applied on the feedback linearized WTGS, which can guarantee the limitation of several performances related to the dynamic response. In such a way, the dynamic response of WTGS can be adjusted through the feedback linearization and regional pole placement techniques. Simulation results show the effectiveness of our results.

关键词： Feedback Linearization Nonlinear

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Repeated Strike Process During Disconnector Operation in Ultra-High Voltage Gas-Insulated Switchgear

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Plasma Science and Technology 2016年第3期18卷 247-253页

作者：关永刚蔡元纪陈维江刘卫东李志兵岳功昌张俊民 State Key Lab of Control and Simulation of Power System and Generation Equipments Department of Electrical EngineeringTsinghua UniversityBeijing 100084China State Grid Corporation of China Beijing 100031China China Electric Power Research Institute Beijing 100192China School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China

Very fast transient over-voltage （VFTO）, induced by disconnector operations in gas- insulated switchgears, has become the limiting dielectric stress at ultra-high voltage levels. Much work has been done to investigate single-strike waveforms of VFTO. However, little study has been carried out investigating the repeated strike process, which would influence VFTO significantly. In this paper, we carried out 450 effective experiments in an ultra-high voltage test circuit, and conducted calculations through the Monte Carlo simulation method, to investigate the repeated strike process. Firstly, the mechanism of the repeated strike process is proposed, based on the ex- perimentai results. Afterwards, statistical breakdown characteristics of disconnectors are obtained and analyzed. Finally, simulations of the repeated strike process are conducted, which indicate that the dielectric strength recovery speed and polarity effect factor have a joint effect on VFTO. This study enhances the understanding of the nature of VFTO, and may help to optimize the disconnector designed to minimize VFTO.

关键词： disconnector （DS） repeated strike process discharge statistical breakdowncharacteristics ultra-high voltage （UHV） very fast transient over-voltage （VFTO）

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High Direction-changing Frequency Bidirectional DC-DC Converter for Charging/Discharging Applications

High Direction-changing Frequency Bidirectional DC-DC Conver...

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Annual Conference of the IEEE Industrial Electronics Society

作者： Ming Fu Tiecai Li Donglai Zhang Yalin Li China Shenzhen Academy of Aerospace Technology Power Electronic and Motion Control Research Center Harbin Institute of Technology Shenzhen Graduate School Shenzhen Shenzhen China School of Electrical Engineering and Automation Harbin Institute of Technology Harbin China Electrical System Engineering Department Institute of Telecommunication Satellite China Academy of Space Technology Beijing China

Based on the battery charging and discharging regulator (BCDR) in spacecraft power conditioning unit application, a bidirectional DC-DC converter BCDR with high direction-changing frequency is proposed in this paper, including the Weinberg-buck bidirectional DC-DC topology and the corresponding bidirectional control. Additionally, the test on the BCDR prototype shows that BCDR parallel modules could achieve the quick switching between charging and discharging with the direction-changing frequency meeting the requirement of 1 kHz, the regulated power bus of small voltage ripple, and high charging and discharging efficiency, in agreement with the expected design.

关键词： Integrated circuits Partial discharges Switches Batteries Power conditioning DC-DC power converters Regulators

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Optimal power management for failure mode of MVDC microgrids in all-electric ships

arXiv

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arXiv 2017年

作者： Xu, Qimin Yang, Bo Han, Qiaoni Yuan, Yazhou Chen, Cailian Guan, Xinping Department of Automation Shanghai Jiao Tong University Shanghai200240 China Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration Shanghai200240 China Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai200240 China Institute of Electrical Engineering Yanshan University Qinhuangdao066004 China

Optimal power management of shipboard power system for failure mode (OPMSF) is a significant and challenging problem considering the safety of system and person. Many existing works focused on the transient-time recovery without consideration of the operating cost and the voyage plan. In this paper, the OPMSF problem is formulated considering the mid-time scheduling and the faults at bus and generator. Two-side adjustment methods including the load shedding and the reconfiguration are coordinated for reducing the fault effects. To address the formulated non-convex problem, the travel equality constraint and fractional energy efficiency operation indicator (EEOI) limitation are transformed into the convex forms. Then, considering the infeasibility scenario affected by faults, a further relaxation is adopted to formulate a new problem with feasibility guaranteed. Furthermore, a sufficient condition is derived to ensure that the new problem has the same optimal solution as the original one. Because of the mixed-integer nonlinear feature, an optimal management algorithm based on Benders decomposition (BD) is developed to solve the new one. Due to the slow convergence caused by the time-coupled constraints, a low-complexity near-optimal algorithm based on BD (LNBD) is proposed. The results verify the effectivity of the proposed methods and algorithms. Copyright © 2017, The Authors. All rights reserved.

关键词： Relaxation processes

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A belief rule inference approach for controlling the system with uncertain parameters

A belief rule inference approach for controlling the system ...

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Chinese control Conference (CCC)

作者： Lifu Zhang Xiaobin Xu Shibao Li Xue Ma Chenglin Wen Institute of System Science and Control Engineering School of Automation Hangzhou Dianzi University Hangzhou Zhejiang CN

ISBN: (纸本)9781509009107

This paper presents a belief rule inference method for controlling the system with uncertain parameters. It uses the belief rule base (BRB) to model nonlinear relationship between system deviation and its integral, differential (inputs) and the controlled variable (output), in which the antecedent and consequent attributes of rule are the referential values of the inputs and output respectively. For the rules activated by the inputs, the evidential reasoning (ER) algorithm is used to combine the belief structures of these rules so as to reason out the value of the controlled variable. Moreover, a nonlinear optimization strategy is given to enhance the accuracy of initial parameters of BRB. A representative experiment on the separately excited DC motor with uncertain parameters illustrates that the proposed method can give more accurate control actions than the classical fuzzy-PID control method.

关键词： DC motors control systems Optimization Training Erbium Transfer functions Data models

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Sliding mode tracking control for miniature unmanned helicopters

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Chinese Journal of Aeronautics 2015年第1期28卷 277-284页

作者： Xian Bin Guo Jianchuan Zhang Yao Zhao Bo The Institute of Robotics and Autonomous System Tianjin Key Laboratory of Process Measurement and ControlSchool of Electrical Engineering and Automation Tianjin University

A sliding mode control design for a miniature unmanned helicopter is presented. The control objective is to let the helicopter track some predefined velocity and yaw trajectories. A new sliding mode control design method is developed based on a linearized dynamic model. In order to facilitate the control design, the helicopter＇s dynamic model is divided into two subsystems,such as the longitudinal-lateral and the heading-heave subsystem. The proposed controller employs sliding mode control technique to compensate for the immeasurable flapping angles＇ dynamic effects and external disturbances. The global asymptotic stability（GAS） of the closed-loop system is proved by the Lyapunov based stability analysis. Numerical simulations demonstrate that the proposed controller can achieve superior tracking performance compared with the proportionalintegral-derivative（PID） and linear-quadratic regulator（LQR） cascaded controller in the presence of wind gust disturbances.

关键词： unmanned sliding miniature compensate quadratic cascaded subsystem disturbance facilitate linearized

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Analysis of underwater locomotion and improvement of FroBot

Analysis of underwater locomotion and improvement of FroBot

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2016 IEEE International Conference on Advanced Intelligent Mechatronics, AIM 2016

作者： Yi, Yang Jianqing, Zhang Han, Xu Maokuan, Chen Lu, Zhang Zhongjing, Zhu School of Automation Beijing Institute of Technology Beijing China State Key Laboratory of Intelligent Control and Decision of Complex System Beijing Institute of Technology Beijing China Department of Electronic Engineering School of Information Science and Technology Tsinghua University Beijing China

ISBN: (纸本)9781509020652

The main characteristic of FroBot is the dual-swing-legs propulsion mechanism, and it is necessary for us to conduct a series of experiments to study its propulsion model, both on land and underwater. As the propulsion of FroBot comes from the interaction force between caudal fins and water when it locomotes underwater, this paper presents an analysis about the propulsion and control of angle Θ. Then a number of underwater hydrodynamic simulations and analysis are also conducted to get a better control in reality. Finally, on the basis of propulsion model and experiments, we present the latest mechanical structure designs and further improvements to eliminate the limitations exposed in the previous generations of FroBot. © 2016 IEEE.

关键词： Propulsion

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