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Simultaneous state and actuator fault estimation for satellite attitude control systems

Chinese Journal of Aeronautics 2016年第3期29卷 714-721页

作者： Cheng Yao Wang Rixin Xu Minqiang Li Yuqing Deep Space Exploration Research Center Harbin Institute of Technology

In this paper, a new nonlinear augmented observer is proposed and applied to satellite attitude control systems. The observer can estimate system state and actuator fault simultaneously. It can enhance the performances of rapidly-varying faults estimation. Only original system matrices are adopted in the parameter design. The considered faults can be unbounded, and the proposed augmented observer can estimate a large class of faults. Systems without disturbances and the fault whose finite times derivatives are zero piecewise are initially considered, followed by a discussion of a general situation where the system is subject to disturbances and the finite times derivatives of the faults are not null but bounded. For the considered nonlinear system, convergence conditions of the observer are provided and the stability analysis is performed using Lyapunov direct method. Then a feasible algorithm is explored to compute the observer parameters using linear matrix inequalities （LMIs）. Finally, the effectiveness of the proposed approach is illustrated by considering an example of a closed-loop satellite attitude control system. The mance in estimating states and actuator faults. It also successfully. simulation results show satisfactory perfor- shows that multiple faults can be estimated

关键词： actuator fault estimation Augmented state observer fault diagnosis Lipschitz nonlinear systemSatellite attitude controlsystem

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Wind and actuator fault estimation for a Quadrotor UAV Based on Two-Stage Particle Filter

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Guidance, Navigation and Control 2023年第3期3卷 24-46页

作者： Zhewen Xing Youmin Zhang Chun-Yi Su Department of Mechanical Industrial and Aerospace Engineering Concordia University Montreal Quebec H3G 1M8Canada

This paper investigates the problems of wind and actuator fault estimation for a quadrotor unmanned aerial vehicle(UAV).To e®ectively assess the safety and reliability of a quadrotor UAV in the presence of unknown wind disturbances,a two-stage particle filter(TSPF)scheme is proposed to obtain the simultaneous estimation of winds and actuator faults that may degrade the performance of the *** this scheme,the first-stage particle filter is used to estimate the states of the quadrotor UAV,and the second-stage particle filter is designed to produce estimates of unknown parameters,including the wind disturbances and actuator *** mitigate the degeneracy and impoverishment issues,the second-stage particle filter admits a parallel implementation of increased particle samplings for the wind and actuator fault ***,simulation results are presented to demonstrate the e®ectiveness of the proposed scheme.

关键词： Unmanned aerial vehicle wind estimation actuator fault estimation two-stage particle filter

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Robust actuator fault estimation for Satellite Control System via Fuzzy Proportional Multiple-integral Observer Method

Robust Actuator Fault Estimation for Satellite Control Syste...

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第二十九届中国控制会议

作者： FU Yanping 1,CHENG Yuehua 1,2,JIANG Bin 1 1.College of Automation Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,P.R.China2.Academy of Frontier Science,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,P.R.China

In this paper,a novel actuator fault estimation scheme based on T-S fuzzy proportional multiple-integral（PMI） observer is developed for satellite attitude control system（ACS）.The nonlinear dynamics of ACS is represented by T-S fuzzy *** the actuator fault and its derivative are introduced as an augmented *** proportional multiple-integral observer is designed to estimate both the system state and the actuator fault simultaneously and *** method is proved to be suitable for soft fault *** issue is considered with respect to input disturbance in the satellite *** effectiveness of our proposed fault diagnosis is demonstrated through numerical simulations.

关键词： Satellite Attitude Dynamics T-S Fuzzy Model actuator fault estimation Fuzzy Proportional Multiple-integral Observer Robustness

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