Output-based discrete-time sliding mode control for a piezoelectrically actuated system

被引：0
作者：
Qingsong Xu
机构：
[1] University of Macau,Department of Electromechanical Engineering, Faculty of Science and Technology
来源：
Nonlinear Dynamics | 2014年 / 76卷
关键词：
Discrete-time; Sliding mode control; Piezoelectric devices; Tracking control; Disturbance;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
This paper presents a new scheme of discrete-time sliding mode control (DSMC) dedicated to precision positioning control of a piezoelectrically actuated system. Traditionally, a hysteresis model is required to compensate for the piezoelectric nonlinearity and a state observer is needed to implement the DSMC, which renders a time-consuming procedure. The proposed output-based DSMC scheme allows the relief of these computational burdens. Specifically, the piezoelectric nonlinearity is considered as a lumped perturbation term which is predicted by a perturbation estimation technique. The elimination of state observer is realized by establishing a control scheme based on the system output only. In addition, the stability of the control system is proved in theory. The effectiveness of the reported scheme is validated on a prototype piezoelectric actuation system by carrying out several experimental investigations.
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页码：551 / 559
页数：8
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