Fault-Tolerant Prescribed Performance Attitude Tracking Control for Spacecraft Under Input Saturation

• Published in: IEEE transactions on control systems technology Vol. 28; no. 2; pp. 574 - 582
• Main Authors: Shao, Xiaodong, Hu, Qinglei, Shi, Yang, Jiang, Boyan
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.03.2020; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Actuators; Adaptive control; Adaptive filters; Algorithms; Attitude control; Attitude tracking; Computer simulation; Constraints; Control algorithms; Control theory; Fault tolerance; Fault tolerant systems; fault-tolerant control (FTC); input saturation; Low pass filters; Measurement; prescribed performance control; Robust control; Saturation; Space vehicles; Spacecraft; Spacecraft attitude control; Spacecraft tracking; Tracking control; Tracking errors; Transient analysis
• ISSN: 1063-6536; 1558-0865
• DOI: 10.1109/TCST.2018.2875426

This brief examines the problem of attitude tracking control with prescribed performance guarantees for a spacecraft subjected to actuator faults and input saturation. To pursue this, the open-loop tracking error dynamics with certain designer-specified performance constraints is first transformed into an equivalent "state-constrained" one, via an error transformation; furthermore, the resulting dynamics is augmented with a dynamic system, which is tactfully constructed to ensure that the control input satisfies the magnitude limits. Subsequently, a robust fault-tolerant controller is developed by using a low-pass filter and an auxiliary system in conjunction with adaptive backstepping design. It is shown that the control algorithm developed not only achieves the stable attitude tracking with prescribed behavioral metrics but also guarantees the boundedness of all the closed-loop signals. Finally, simulation results are given to evaluate the efficacy of the proposed scheme.