期刊
IEEE TRANSACTIONS ON FUZZY SYSTEMS
卷 31, 期 1, 页码 148-159出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TFUZZ.2022.3183798
关键词
Event-triggering mechanism; fault-tolerant control (FTC); fuzzy high-gain observer; interconnected nonlinear system
This article considers the problem of decentralized event-triggered fault-tolerant control for interconnected nonlinear systems with unknown strong coupling and actuator failures. A new decentralized adaptive control scheme is proposed to enable each subsystem output to track the desired trajectory. The effectiveness of the proposed scheme is demonstrated by a practical interconnected system.
In this article, the problem of decentralized event-triggered fault-tolerant control (FTC) for a class of interconnected nonlinear systems with unknown strong coupling and actuator failures is considered. In order to enable each subsystem output to track the desired trajectory, a new decentralized adaptive control scheme is given. First, an event-triggering mechanism is introduced to reduce the signal transmission frequency between the controller and the actuator. Second, a fuzzy high-gain observer is designed for each subsystem to estimate unknown nonlinear functions and actuator efficiency factor. Third, a decentralized FTC strategy is proposed to compensate for the effects of actuator failures and achieve the desirable system tracking performance. With the aid of graph theory, it is shown that all the closed-loop signals are semiglobally uniformly ultimately bounded, and the tracking error of each subsystem can converge to an arbitrarily small residual set by adjusting a design parameter. The effectiveness of the proposed scheme is demonstrated by a practical interconnected system.
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