Performance recovery-based adaptive saturated fault-tolerant control of uncertain nonlinear systems with actuator switching and periodic disturbances

• Published in: European journal of control Vol. 77; p. 100969
• Main Authors: Wu, WenJing, Niu, Ben, Xu, Ning, Zhao, Xudong, Liu, Yunfeng
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.05.2024
• Subjects: Actuator switching; Fault-tolerant control; Low-computation method; Performance recovery; Periodic disturbances; Performance recovery; Actuator switching; Periodic disturbances; Fault-tolerant control; Low-computation method
• ISSN: 0947-3580; 1435-5671
• DOI: 10.1016/j.ejcon.2024.100969

This paper studies an adaptive saturated fault-tolerant control problem for uncertain nonlinear systems with periodic disturbances. In contrast to previous fault-tolerant control methods, a case of deferred actuator switching is taken into account, which stands for a more common situation. By designing monitoring functions and reconfigurable controllers, tracking errors can be recovered to prescribed performance within a specified time after a fault is detected. Then, a low-computation control strategy is employed to address the problem of complexity explosion, and neural networks and Fourier series expansion are combined to model the uncertain nonlinear dynamics subject to time-varying periodic disturbances. The proposed scheme has a simpler structure and ensures the boundedness of all signals within the closed-loop system. Finally, to verify the effectiveness of the design scheme, two simulation examples are provided.