Adaptive fast finite-time control for nonstrict-feedback time-dealy systems with unknown control directions and dead zone

Hanxue Yue and Huanqing Wang

International Journal of Systems Science, 2023, vol. 54, issue 5, 1101-1116

Abstract: This paper concentrates on the study of the adaptive fast finite-time control method for a class of nonlinear time-delay systems with unknown control directions and dead zone. Fuzzy logic systems (FLSs) are employed to handle the problem of uncertain nonlinear terms. The Nussbaum function is utilised to deals with the problem of unknown control directions. Based on the fast finite-time stability theory, a novel adaptive fast finite-time fault tolerant control scheme is proposed under the framework of adaptive backstepping control. Choosing an appropriate Lyapunov-Krasovskii function, it is theoretically proved that the proposed control scheme can not only ensure that the control system is semi-global practical fast finite-time stable but also the tracking error converges to a small neighbourhood of the origin in a fast finite-time. Finally, simulation studies are given to demonstrate the effectiveness of the proposed method.

Date: 2023
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DOI: 10.1080/00207721.2023.2168140

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