Anti-disturbance and fault-tolerant control of dual-satellite formation configuration maintenance

被引：0
|
作者：
Chen G.-J. [1 ,2 ,3 ]
Chang L. [1 ,3 ]
Yang X.-B. [1 ,3 ]
Yang C.-L. [1 ]
Li Y.-B. [1 ,2 ,3 ]
机构：
[1] Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun
[2] University of Chinese Academy of Sciences, Beijing
[3] Key Laboratory of Space-based Dynamic & Rapid Optical Imaging technology, Chinese Academy of Sciences, Changchun
来源：
Guangxue Jingmi Gongcheng/Optics and Precision Engineering | 2021年 / 29卷 / 03期
关键词：
Disturbance observer; Dual-satellite formation; Fault estimation; Fault-tolerant control;
D O I：
10.37188/OPE.20212903.0605
中图分类号：
学科分类号：
摘要：
To solve the problem of low precision and poor stability of dual-satellite formation orbit control caused by system modeling errors, external disturbances, and actuator faults, this paper proposes an anti-disturbance and fault-tolerant linear quadratic regulator (LQR) control strategy based on an observer. First, according to a relative motion dynamic model of two satellites, an augmenting observer is designed based on the double proportional integral adaptive law, which not only can estimate intermittent faults and fast time-varying faults, but can also simultaneously estimate the system state and disturbance quickly and accurately. Regarding unmodeled disturbances, the optimization technology is used to suppress their influence on the control system. Second, the existence condition and design method of the observer are given using the linear matrix inequality (LMI) technique. The asymptotic stability of the dynamic error system is guaranteed using Lyapunov stability theory. Then, a closed-loop feedback fault-tolerant and anti-interference LQR control law is designed by adding feedforward compensation to the controller using unknown dynamic estimation information. Finally, the experimental results show that the proposed method can accurately and quickly track external interferences, actuator faults, and system states. Compared with the control methods reported in the literature, the proposed method significantly enhances the accuracy of fault estimation and improves by 49.93% the relative position control accuracy of formation satellites. This verifies the superiority of the anti-interference fault-tolerant LQR control law, which can provide an accurate configuration maintenance control strategy for dual-satellite formation configuration maintenance. © 2021, Science Press. All right reserved.
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页码：605 / 615
页数：10
相关论文
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