Compensation of hysteresis for calibrator of giant magnetostrictive actuator based on preisach model

A calibrator based on the giant magnetostrictive actuator is most suitable to calibrate accuracy and frequency response of high-precision displacement sensor, because giant magnetostrictive actuator has some unique characteristics, such as big output force, high precision micro-displacement whose accuracy can be in nm and high frequency response. But the relation between input magnetic field and output micro-displacement of giant magnetostrictive actuator because of hysteresis will be nonlinearity, special in high frequency response. The classical Preisach model had been used to approximate the hysteresis of the giant magnetostrictive actuator in this paper. And we have applied the inverse preisach operator to compensate hysteresis of actuator in a feedback control loop for improving the output characteristic of giant magnetostrictive actuator. Through emulating, it had been verified that the effect of hysteresis had been attenuated obviously. Through calibrating a high-precision sensor, we could verify that the giant magnetostrictive actuator have higher precise position in high frequency response after compensating hysteresis.