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Finite frequency H∞ filtering for uncertain discrete-time switched linear systems

Progress in Natural Science:Materials International 2009年第11期19卷 1625-1633页

作者： Dawei Ding~(a,*),Guanghong Yang~(a,b) a College of Information Science and Engineering,Northeastern University,Shenyang 110004,China b Key Laboratory of Integrated Automation of Process Industry,Ministry of Education,Northeastern University,Shenyang 110004,China College of Information Science and Engineering Northeastern University Shenyang 110004 China Key Laboratory of Integrated Automation of Process Industry Ministry of Education Northeastern University Shenyang 110004 China

This paper is concerned with the problem of robust H∞filtering for discrete-time switched linear systems with polytopic uncertainties in the finite frequency *** on the generalized Kalman-Yakubovich-Popov(gkyp) lemma and switched parameter-dependent Lyapunov functions,a switched full-order filter is designed such that the corresponding filtering error system is asymptotically stable and satisfies a prescribed finite frequency H∞performance *** with the existing full frequency approaches,the proposed finite frequency one receives better results for the cases in which the frequency ranges of noises are known.A numerical example is given to illustrate the effectiveness of the proposed method.

关键词： Switched systems Filtering Finite frequency gkyp lemma Linear matrix inequalities(LMIs)

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Diagonal Dominance for Flight Control Systems of Canard Aircraft in Finite Frequency Range 25th

Diagonal Dominance for Flight Control Systems of Canard Airc...

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第25届中国控制与决策会议

作者： Zhe Li Jiuxiang Dong Guang-Hong Yang College of Information Science and Engineering Northeastern University State Key Laboratory of Synthetical Automation for Process Industry

ISBN: (纸本)9781467355322

This paper presents a new method for determining a constant precompensator for reducing the effects of interactions of the flight control systems in Canard Aircraft. However, the previous methods achieve diagonal dominance either at a certain suitable frequency or across the entire frequency domain. Taking the practical engineering situation into consideration, it is necessary to achieve diagonal dominance among a specific section instead of the whole of the frequency domain. This paper combines the LMIs and the Generalized KYP lemma to obtain a new method to solve the problem. The algorithm is then modified to reduce the conservatism by the introduction of a path-shaping matrix. The path-shaping matrix enables a designer to find an optimal precompensator to achieve a specific forward path structure and a satisfactory output response. The algorithm is applied to a Canard Aircraft flight control system. Simulations show the new approach can more effectively decouple the Canard Aircraft system than other approaches.

关键词： Diagonal dominance frequency domain inequality gkyp lemma linear matrix inequalities (LMIs).

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Finite Frequency Fault Detection Observer Design for Uncertain Descriptor Systems

Finite Frequency Fault Detection Observer Design for Uncerta...

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第36届中国控制会议

作者： Yuanyong Yan Yimin Liu Minsong Yang Jianliang Chen The Education Department Engineering Research Center of Metallurgy Automation and Detection Technology

ISBN: (纸本)9781538629185

This paper focuses on the H/H fault detection observer design issue in the finite frequency domain for a class of uncertain descriptor *** detect faults effectively for systems with model uncertainties and in the presence of unknown disturbances,a new fault detection filter is designed to satisfy a finite frequency H/H performance index ***,two basic performance analysis conditions are obtained by the aid of generalized KYP lemma and projection ***,new sufficient conditions for the proposed fault detection observer are derived as bilinear matrix inequalities when consider uncertain terms and our filter design ***,an Iterative Linear Matrix Inequality(ILMI) algorithm is proposed to solve the optimisation *** effectiveness of the proposed method is illustrated by simulation example.

关键词： Fault detection uncertain descriptor system finite frequency domain gkyp lemma linear matrix inequalities

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Robust Fault Detection Observer for Discrete LTI Systems

Robust Fault Detection Observer for Discrete LTI Systems

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第二十九届中国控制会议

作者： WEI Xiukun1,2,QIN Yong1,2,JIA Limin1,2 1.State Key Laboratory for Rail Traffic Control and Safety,Beijing Jiaotong University,Beijing 100044,P.R.China2.School of Traffic and Transportation,Beijing Jiaotong University,Beijing 100044,P.R.China

This paper addresses the robust fault detection observer design issue for discrete linear time invariant（LTI）systems with parameter uncertainties in a polytope and subjected to unknown *** observer design is investigated under the H∞/H?index framework in the finite frequency domain where the generalized KYP lemma is *** threshold design is investigated also in the finite frequency *** example is given to illustrate the results obtained in this paper.

关键词： Fault Diagnosis Robustness gkyp lemma

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Robust Fault Detection Dynamic Observer Design for LTI Systems

Robust Fault Detection Dynamic Observer Design for LTI Syste...

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2010 Chinese Control and Decision Conference

作者： Xiukun Wei~1,Liu Lihua~2,Guoqiang Cai~1,Yong Qin~1,Limin Jia~1 1.State Key Laboratory of Rail Traffic Control and Safety,Beijing Jiaotong University Haidian District Shang Yuan Cun 3,100044,Beijing,China. 2.Institute of Automation,Beijing Information Science & Technology University,Beijing,China.

Dynamic observer provides more freedom to meet the diversified performance specifications for fault detection purpose in contrast with static ***,little attention is paid on its design and only a few papers investigated how to design a fault detection dynamic *** this work,we propose an innovative dynamic observer design approach for Unear time invariant(LTI) systems subjected to unknown disturbance and possible faults with the aid of the generalized KYP lemma developed *** dynamic observer is designed such that the disturbances are attenuated to a specified level to meet the Hperformance in the concerned finite frequency interval while the sensitivity to the possible faults in its frequency domain is maximized in the Hindex *** existence conditions of such an observer are given in terms of Unear matrix inequaUties(LMIs).An iterative algorithm is presented to achieve the *** effectiveness of the proposed method is illustrated by a numerical example.

关键词： Fault Detection Threshold Design Dynamic Observer gkyp lemma

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Fault Detection and Estimation for LTI Systems and its Application to a Lab Robotic Manipulator

Fault Detection and Estimation for LTI Systems and its Appli...

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2009中国控制与决策会议

作者： Michel Verhaegen Delft Center for Systems and Control Delft University of TechnologyDelft 2628 CDThe Netherlands

＜正＞This paper addresses the fault detection and fault estimation issues for linear discrete time invariant（LTI） systems subject to unknown *** underlying problems are investigated based on the generalized KYP lemma in the finite frequency *** this paper,a new LMIs solution to the fault detection issue is proposed,which is slightly different from the available result and the set of LMIs are also simpler.A fault estimation method which focus on estimating the low frequency faults is also *** fault detection and fault estimation techniques are further applied to a lab robotic manipulator.

关键词： Fault Detection Fault Estimation gkyp lemma Finite frequency Robotic Manipulator

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Fault Estimation of Large Scale Wind Turbine Systems

Fault Estimation of Large Scale Wind Turbine Systems

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第二十九届中国控制会议

作者： WEI Xiukun 1,2,LIU Lihua 3 1.State Key Laboratory for Rail Traffic Control and Safety,Beijing Jiaotong University,Beijing 100044,P.R.China2.Traffic and Transportation School,Beijing Jiaotong University,Beijing 100044,P.R.China 3.Institute of Automation,Beijing Information Science and Technology University,Beijing 100192,P.R.China

Fault diagnosis of large scale wind turbine systems has received much attention in the recent *** fault prediction would allow for scheduled maintenance and for avoiding catastrophic *** the availability of wind turbines can be enhanced and the cost for maintenance can be *** this paper,we consider the sensor and actuator fault detection issue for large scale wind turbine systems where the individual pitch control is used for loads *** faults considered in the paper are mainly the blade root bending moment sensor faults and blade pitch actuator *** the aid of a dynamical model of the wind turbine system,A dynamic filter,which is designed based on gkyp lemma in the finite frequency domain,is used to estimate the fault *** effectiveness of the proposed approach is demonstrated by simulation results for several fault scenarios.

关键词： Fault estimation Filter Design Robustness gkyp lemma

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