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Event-trigger-based fault-tolerant control of uncertain non-affine systems with predefined performance
Yang, Yang Zhang, Yuwei Wang, Zijin Wu, Jinran Si, Xuefeng
Yang, Yang
Zhang, Yuwei
Wang, Zijin
Wu, Jinran
Si, Xuefeng
Abstract
Fault-tolerant control (FTC) of a non-affine system with uncertainties is one of critical issues in nonlinear control. In this paper, in the presence of unknown actuator failures, an event-trigger-based FTC scheme is proposed for such a nonlinear system with predefined performance. For actuator failures, a compensation mechanism is designed to alleviate their impacts. By utilizing a predefined performance function, higher tracking accuracy can be obtained. Meanwhile, an event-triggered mechanism with a time-varying threshold, depending on tracking error, reduces the number of communications for a controller-to-actuator channel. An adaptive event-triggered function is then proposed with the compensation mechanism to improve the self-adjusting ability of the triggered function. Also, extended state observers and tracking differentiators are utilized to reconstruct unknown dynamics of the system and to simplify high-order derivation of virtual control laws, respectively. The stability of the closed-loop system is analyzed by input-to-state practically stability. Finally, two simulation results are supplied to verify the effectiveness of the proposed control method.
Keywords
active disturbance rejection control, actuator failures, event-triggered control, fault-tolerant control, uncertain non-affine system
Date
2023
Type
Journal article
Journal
International Journal of Control, Automation and Systems
Book
Volume
21
Issue
2
Page Range
519-535
Article Number
ACU Department
Institute for Positive Psychology and Education
Faculty of Education and Arts
Faculty of Education and Arts
Relation URI
Source URL
Event URL
Open Access Status
License
All rights reserved
File Access
Controlled