Application of FTASMC in photoelectric tracking system
DONG Lirong, REN Yan, WANG Yimin
1. Baotou Vocational & Technical College, Baotou 014010, China;
2. School of Information Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China
Abstract: Aiming at the influence of external disturbance and friction disturbance on the tracking accuracy of photoelectric tracking system, a finite time adaptive sliding mode compound control (FTASMC) strategy is proposed. Firstly, for all kinds of disturbances, a high-order sliding mode disturbance observer is designed based on super twisting to quickly estimate the disturbance of the compensation system. Secondly, in order to improve the control accuracy, a new double power adaptive sliding mode controller (DASMC) strategy is proposed. In the process of controller design, a new sliding mode surface is designed by using double power theory and terminal sliding mode control theory. And a new adaptive fast sliding mode reaching law is designed, a control rate that can ensure the global fast convergence of the system in finite time is obtained. Finally, Lyapunov theory is used to prove that the proposed control strategy can make the system achieve error convergence in finite time. Simulation results show the effectiveness of the proposed control method.
Keywords: photoelectric tracking system;adaptive sliding mode control;terminal sliding mode control;finite time control;Lyapunov theory
2023, 49(9):71-76  收稿日期: 2021-7-23;收到修改稿日期: 2021-10-15
基金项目: 国家自然科学基金（62063027）；内蒙古自然科学基金（2019MS06002）
作者简介: 董丽荣（1982-），女，内蒙古包头市人，讲师，硕士，研究方向为先进伺服系统控制策略。
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