Volume 33, Issue 10 pp. 1567-1582
RESEARCH ARTICLE

Adaptive fuzzy output-feedback tracking control for switched stochastic pure-feedback nonlinear systems

Yi Chang

Corresponding Author

Yi Chang

School of Engineering, Bohai University, Jinzhou, China

Yi Chang, School of Engineering, Bohai University, Jinzhou 121000, China.

Email: [email protected]

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Yuanqing Wang

Yuanqing Wang

School of Engineering, Bohai University, Jinzhou, China

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Fuad E. Alsaadi

Fuad E. Alsaadi

Department of Electrical & Computer Engineering, Faculty of Engineering, King Abdulaziz University, Jeddah, Saudi Arabia

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Guangdeng Zong

Guangdeng Zong

School of Engineering, Qufu Normal University, Rizhao, China

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First published: 16 September 2019
Citations: 122

Summary

This paper considers the problem of adaptive fuzzy output-feedback tracking control for a class of switched stochastic nonlinear systems in pure-feedback form. Unknown nonlinear functions and unmeasurable states are taken into account. Fuzzy logic systems are used to approximate the unknown nonlinear functions, and a fuzzy observer is designed to estimate the immeasurable states. Based on these methods, an adaptive fuzzy output-feedback control scheme is developed by combining the backstepping recursive design technique and the common Lyapunov function approach. It is shown that all the signals in the closed-loop system are semiglobally uniformly ultimately bounded in mean square in the sense of probability, and the observer errors and tracking errors can be regulated to a small neighborhood of the origin by choosing appropriate parameters. Finally, a simulation result is provided to show the effectiveness of the proposed control method.

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