压电陶瓷迟滞非线性的成因与校正  

Forming reason and correction for hysteresis nonlinearity of piezoelectric ceramics

作　　者：史丽萍[1] 魏艳波[1] 魏喜雯[1] 张波[1] 徐艳春[1] 瞿晓东[1] 

机构地区：[1]黑龙江大学机电工程学院,哈尔滨150080

出　　处：《黑龙江大学工程学报》2013年第2期103-107,112,共6页Journal of Engineering of Heilongjiang University

基　　金：黑龙江省教育厅科学技术研究项目(11541272)

摘　　要：针对压电陶瓷执行器输出位移的迟滞非线性现象,基于压电陶瓷铁电效应的微观极化机理,应用电畴转向理论,解释了产生迟滞非线性的原因。为了降低迟滞特性对压电陶瓷执行器的影响,研究了MPT-2MRL103A压电陶瓷微位移执行器迟滞特性,并采用广义非线性Preisach模型建立压电陶瓷执行器迟滞模型,利用建立的的模型作为PID反馈控制的前馈环节进行闭环精密定位控制,进一步改善压电陶瓷执行器驱动电压与输出位移间的线性关系,提高定位精度。The phenomenon for hysteresis nonlinearity of output displacement in piezoelectric actuator. The forming reason of hysteresis nonlinearity is explained based on microscopic polarization mechanism of ferroelectric effect, domain wall theory. In order to reduce the hysteresis characteristics of piezoelectric actuator, relative experimental researching on the MPT-2MRL103A piezoelectric micro-displacement actuator are carried out, and the hysteresis nonlinearity of actuator are analyzed. The generalized nonlinearity Preisach model is used to establish the hysteresis model of a piezoelectric actuator. A research on close-loop precision positioning control using the established generalized nonlinearity Preisach model as feed forward segment of a PID feed-back control is conducted. The experimental results show that the generalized nonlinearity Preisach model has a better linearity of piezoelectric actuator and can offer a good tracking accuracy.

关 键 词：压电陶瓷执行器 铁电效应 迟滞非线性 广义非线性 PREISACH模型 

分 类 号：TP21[自动化与计算机技术—检测技术与自动化装置]