Adaptive Interval Type-2 Fuzzy Neural Network-Based Novel Fixed-Time Backstepping Control for Uncertain Euler–Lagrange Systems
Authors: 
Zhuang Liu, Chengwei Wu, Xiaoning Shen, Weiran Yao, Jianxing Liu, Ligang WuAuthors Info & Claims
Zhuang Liu, Chengwei Wu, Xiaoning Shen, Weiran Yao, Jianxing Liu, Ligang WuAuthors Info & ClaimsPages 2966 - 2975
Abstract
In this article, a novel adaptive fixed-time fuzzy control algorithm is designed for uncertain Euler–Lagrange (EL) systems with actuator control input saturation. In contrast to existing algorithms, this article explores a faster fixed-time backstepping control algorithm. It enables the system to achieve fixed-time convergence with a faster convergence rate and obtain a smaller upper bound of the convergence time. To address the problem of actuator control input saturation, a novel fixed-time auxiliary system is constructed, involving coordinate transformation of the system's error variables to mitigate the effects of saturation. In response to the unknown dynamics (including model uncertainty, external disturbance, etc.) of the EL system, this article designs an adaptive interval type-2 fuzzy neural network for estimation and compensation. Stability analysis confirms that the tracking error can achieve faster fixed-time convergence. Simulation and experimental results demonstrate that the proposed control algorithm can enhance dynamic and steady-state tracking control performance.
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Published: 01 May 2024
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