Adaptive Finite-Time Fuzzy Control for Uncertain Nonlinear Systems with Asymmetric Full-State Constraints

Yinlong Hou, Xiaoling Xu, Ruixia Liu (), Xiangyun Bai and Hui Liu
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Yinlong Hou: School of Automation, Xi’an University of Posts and Telecommunications, Xi’an 710072, China
Xiaoling Xu: School of Automation, Xi’an University of Posts and Telecommunications, Xi’an 710072, China
Ruixia Liu: School of Automation, Xi’an University of Posts and Telecommunications, Xi’an 710072, China
Xiangyun Bai: School of Automation, Xi’an University of Posts and Telecommunications, Xi’an 710072, China
Hui Liu: School of Automation, Xi’an University of Posts and Telecommunications, Xi’an 710072, China

Mathematics, 2023, vol. 11, issue 20, 1-20

Abstract: This paper studies the adaptive finite-time fuzzy control issue associated with uncertain nonlinear systems that exhibit asymmetric constraints on the full state. A distinct function, constrained by nonlinear states, is designed to mitigate the excessive breach of these full-state boundaries. Unlike the standard barrier Lyapunov function (BLF) method, this approach solves symmetric and asymmetric full-state constraints without modifying the controller structure, and it does not require any additional assumptions about virtual control to be met. Simultaneously employing approximating functions using fuzzy logic systems and incorporating dynamic surface control technology integrated with a first-order filter, the unknown nonlinear functions emanating from the suggested controller strategy are estimated. Additionally, this approach addresses the prevalent problem of complexity explosion observed in conventional backstepping techniques. An adaptive finite-time fuzzy tracking control strategy is introduced, ensuring that all signals and tracking errors of the controlled system remain bounded in finite time. Finally, two simulation examples are given to illustrate the effectiveness of the proposed control scheme, confirming that all states remain within the predefined regions.

Keywords: adaptive backstepping control; full-state constraints; finite-time control (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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