Adaptive fast sliding mode fault tolerant control integrated with disturbance observer for spacecraft attitude stabilization system

Bin Guo; Yong Chen

doi:10.1016/j.isatra.2019.04.014

Adaptive fast sliding mode fault tolerant control integrated with disturbance observer for spacecraft attitude stabilization system

ISA Trans. 2019 Nov:94:1-9. doi: 10.1016/j.isatra.2019.04.014. Epub 2019 Apr 25.

Authors

Bin Guo¹, Yong Chen²

Affiliations

¹ School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China; Institute of Electric Vehicle Driving System and Safety Technology, University of Electronic Science and Technology of China, Chengdu, 611731, China. Electronic address: bguodxl@163.com.
² School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu, 611731, China; Institute of Electric Vehicle Driving System and Safety Technology, University of Electronic Science and Technology of China, Chengdu, 611731, China. Electronic address: ychencd@uestc.edu.cn.

PMID: 31047644
DOI: 10.1016/j.isatra.2019.04.014

Abstract

In this paper, the problem of fault-tolerant control (FTC) for spacecraft attitude stabilization system with actuator fault and mismatched disturbance is investigated. A novel fault tolerant control strategy based on adaptive fast terminal sliding mode control (AFTSMC) is proposed. Firstly, a novel composite observer is proposed to estimate the disturbance, actuator efficiency factor and partial states of the system. By introducing a sliding mode observer, the bias actuator fault is reconstructed. Subsequently, in accordance with the estimated information, a novel sliding mode fault tolerant controller is designed. The proposed control scheme contains two compensators and two adaptive parameters to attenuate the mismatched disturbance, to compensate actuator fault, and to guarantee fast convergence of the system. Furthermore, the reachability of sliding motion is proved. The simulation results for the spacecraft system illustrate the effectiveness of the proposed method.

Keywords: Actuator fault; Adaptive fast terminal sliding mode; Composite observer; Fault-tolerant control (FTC); Mismatched disturbance; Spacecraft system.