An active fault tolerant control method for spacecraft with fault and disturbance decoupling

被引：0
|
作者：
Zong Q. [1 ]
Yang X. [1 ]
Zhang X. [1 ]
Liu W. [2 ]
机构：
[1] School of Electrical Automation and Information Engineering, Tianjin University, Tianjin
[2] Science and Technology on Space Intelligent Control Laboratory, Beijing Institute of Control Engineering, Beijing
来源：
Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology | 2020年 / 52卷 / 09期
关键词：
Fault diagnosis; Fault estimation; Fault tolerant control; Observer design; Spacecraft;
D O I：
10.11918/201909065
中图分类号：
学科分类号：
摘要：
To improve the reliability of spacecraft system, an active fault tolerant control technique for spacecraft under the influence of disturbance was studied. First, in order to realize fault diagnosis under disturbance and reduce the time delay from fault detection to fault estimation, the concerned faults were extended to state vectors, and an unknown input observer was proposed for the integrated design of fault detection and fault estimation unit. Then, considering that the method needs to be further processed for interference estimation and can only solve the differentiable fault type, a novel adaptive sliding mode unknown input observer was designed, which can ensure the estimation of fault and disturbance decoupling at the same time and deal with a wider range of fault types. Finally, in view of the estimation error of the observer, a multivariable terminal sliding mode fault tolerant controller was proposed to improve its control performance. Simulation results show that the active fault tolerant control technique could realize fault diagnosis under the influence of disturbance and ensure the rapid recovery of control performance. © 2020, Editorial Board of Journal of Harbin Institute of Technology. All right reserved.
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页码：107 / 115
页数：8
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