Error compensation for hysteresis nonlinearity of piezoelectric ceramic vibration sensors

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (23) : 278-285.

CHEN Gaohua1,YAN Xianguo2,GUO Hong2,LI Zhifei1

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Abstract

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.

Key words

piezoceramic sensor / hysteresis nonlinearity / hysteresis model / inverse compensation / detection accuracy

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CHEN Gaohua1,YAN Xianguo2,GUO Hong2,LI Zhifei1. Error compensation for hysteresis nonlinearity of piezoelectric ceramic vibration sensors[J]. Journal of Vibration and Shock, 2018, 37(23): 278-285

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