基于正切函数的压电驱动磁滞建模及其控制  

Research on Hysteresis Modeling and Control of Piezoelectric Drive Based on Tangent Function

作　　者：席守治 赖磊捷 XI Shouzhi;LAI Leijie(School of Mechanical and Automotive Engineering,Shanghai University of Engineering Science,Shanghai 201620,China)

机构地区：[1]上海工程技术大学机械与汽车工程学院,上海201620

出　　处：《轻工机械》2020年第5期74-78,共5页Light Industry Machinery

基　　金：国家自然科学基金资助项目(51605275)。

摘　　要：压电陶瓷驱动器具有迟滞、蠕变等非线性特性,降低了微纳米定位平台的精度,因此,课题组通过建立压电陶瓷微位移驱动器的磁滞模型以提高精密定位系统的控制精度,并且设计有效的控制系统加以实验验证。课题组建立了基于正切函数的磁滞模型,将磁滞模型串联在系统中,成功抑制了系统的磁滞效应。在控制系统设计中,采用了逆模型控制、PID控制和PID+前馈控制3种控制策略对微位移实验平台进行控制,验证了模型的精确性和可行性。通过对比分析实验结果可得:实验中的3种控制策略均能有效控制微位移平台的运动,其中以PID+前馈控制的控制效果最为优秀。Piezoelectric ceramic actuators have non-linear characteristics such as hysteresis and creep,which reduce the accuracy of micro-nano positioning platforms.The hysteresis model of the piezoelectric ceramic micro-displacement actuator was established to improve the control accuracy of the precision positioning system,and an effective control system was designed for experimental verification.The hysteresis model based on the tangent function was established and connected in series in the system,and the hysteresis effect of the system was successfully suppressed.In the design of the control system,three control strategies including inverse model control,PID control and PID+feedforward control were used to control the micro-displacement experimental platform to verify the accuracy and feasibility of the model.In addition,through comparative analysis of the experimental results,it is concluded that the three control strategies in the experiment can effectively control the movement of the micro-displacement platform,and the control effect of PID+feedforward control is the best.

关 键 词：微位移平台 压电陶瓷 迟滞模型 逆模型控制 PID+前馈控制 

分 类 号：TH703.8[机械工程—仪器科学与技术] TM282[机械工程—精密仪器及机械]