A temperature-dependent control technique for a highly sensitive piezoelectric actuator

This paper deals with the control of the piezoelectric tube in the presence of the variation of the temperature. Besides the hysteresis and the creep nonlinearities, and the badly-damped oscillations, the piezoelectric tube is highly-sensitive to the variation of the temperature. This variation impacts considerably the global model of the actuator and induces the change in its resonant frequencies. To handle the variation of the actuator model we propose the combination of the classical Proportional-Integral structure with the switching strategy. The proposed control strategy is applied to the X-axis of the piezoelectric tube. The simulation and the experimental results prove the efficacy of the proposed control strategy to maintain the good performances of the closed-loop system, in the presence of temperature variations.