Design of dynamic surface fixed time controller based on new disturbance observer

被引：0
作者：
Wu, Zhong-Hua [1 ]
Zheng, Shuai-Peng [1 ]
Zhang, Jian-Jun [1 ]
机构：
[1] College of Electrical Engineering and Automation, Henan Polytechnic University, Hunan, Jiaozuo
来源：
Kongzhi Lilun Yu Yingyong/Control Theory and Applications | 2024年 / 41卷 / 11期
基金：
中国国家自然科学基金;
关键词：
backstepping control; disturbance observer; dynamic surface control; fixed-time stable;
D O I：
10.7641/CTA.2024.20272
中图分类号：
学科分类号：
摘要：
In view of the mismatched disturbance of a kind of nonlinear strict feedback system, a dynamic surface fixed time control strategy based on the new disturbance observer is proposed. Firstly, a new disturbance observer is designed to estimate the mismatched disturbances. Secondly, the fixed-time controller without fractional power term is designed by using backstepping method to avoid singular value problem. Then, combined with the new fixed-time filter, the phenomenon of “differential explosion” is eliminated. The analysis of Lyapunov’s function stability theory shows that the proposed scheme can ensure that the tracking error converges to the small neighborhood of the origin in a fixed time, and the simulation results verify the effectiveness of the proposed control scheme. © 2024 South China University of Technology. All rights reserved.
引用
收藏
页码：2180 / 2188
页数：8
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