The Piezoelectric Actuator Drive (PAD) is a type of rotary motor that transforms the linear motion of piezoelectric stack actuators into a precise rotational motion. The very high stiffness of the actuators employed make this type of motor suited for open-loop control, but the inherent hysteresis exhibited by piezoelectric ceramics causes losses. Therefore, this paper presents a straightforward method to measure piezoelectric stack actuator equiv- alent parameters that includes nonlinearities. By folding the nonlinearities into a newly-defined cou- pling coefficient, the inherent hysteretic behavior of piezoelectric stack actuators can be greatly reduced through precompensation. Experimental results show a fitting accuracy of 98.8 % between the model and measurements and a peak absolute error reduction by a factor of 10 compared to the manufacturer- provided parameter. This method improves both the static and dynamic performance of the Piezoelectric Actuator Drive (PAD) while still permitting open-loop control.
Piezoelectric stack actuator parameter extraction with hysteresis compensation
2014-01-01
Zsurzsan , T-G , Mangeot , C , Andersen , M A E , Zhang , Z & Andersen , N A 2014 , Piezoelectric stack actuator parameter extraction with hysteresis compensation . in Proceedings of EPE'14 ECCE Europe . IEEE , 16th Conference on Power Electronics and Applications , Lappeenranta , Finland , 26/08/2014 . https://doi.org/10.1109/EPE.2014.6910969
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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