压电陶瓷振动传感器的迟滞非线性误差补偿研究  

Error compensation for hysteresis nonlinearity of piezoelectric ceramic vibration sensors

作　　者：陈高华[1] 闫献国[2] 郭宏[2] 李志飞 CHEN Gaohua;YAN Xianguo;GUO Hong;LI Zhifei(School of Electronic Information Engineering,Taiyuan University of Science and Technology,Taiyuan030024,China;School of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan030024,China)

机构地区：[1]太原科技大学电子信息工程学院,太原030024 [2]太原科技大学机械工程学院,太原030024

出　　处：《振动与冲击》2018年第23期278-285,共8页Journal of Vibration and Shock

基　　金：山西省自然科学基金(201701D121056);国家自然科学基金(51675363)

摘　　要：针对振动测试中压电陶瓷传感器的迟滞非线性会影响检测精度的问题,分析了压电陶瓷的微观极化机理,解释了压电陶瓷传感器产生迟滞非线性的原因。为了有效补偿压电陶瓷的迟滞非线性,提高检测精度,提出了一种可以反映压电陶瓷传感器非对称迟滞特性的改进Bouc-Wen模型,研究并给出了模型参数对迟滞曲线的大小、形状及平稳性影响关系和逆模型的求取方法。利用改进Bouc-Wen逆模型作为补偿器来补偿压电陶瓷传感器的迟滞非线性,实验验证结果表明:采用逆补偿后,校正位移总是能够很好跟踪传感器的实际输入位移,有效保证了检测精度。The hysteresis nonlinearity of piezoelectric ceramic sensors affects detection accuracy in vibration measurement.Here,the micro-polarization mechanism of piezoelectric ceramics was analyzed and the reason why piezoelectric ceramic sensors have hysteresis nonlinearity was explained.In order to effectively compensate the hysteresis nonlinearity of piezoelectric ceramics and improve the detection accuracy,a modified Bouc-Wen model to reflect the asymmetric hysteresis feature of piezoelectric ceramic sensors was proposed.The effects of model parameters on magnitude,shape and stationarity of hysteresis curves were analyzed.The solving method of the inverse model was derived.The modified Bouc-Wen inverse model was taken as a compensator to compensate the hysteresis nonlinearity of piezoelectric ceramic sensors.The test results showed that after using the inverse compensation,the corrected displacement can always track the actual input displacement of the sensor to effectively guarantee its detection accuracy.

关 键 词：压电陶瓷传感器 迟滞非线性 迟滞模型 逆补偿 检测精度 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]