The actuation principle of the piezoelectric ceramics micro-displacement actuator is elaborated

and the characteristics and the applications of the actuator are introduced.Relative experimental researches on the WTYD0808042 piezoelectric ceramics micro-displacement actuator are carried out with self-designed output characteristics test system

and the non-linear and hysteresis of actuator are analyzed.A Duhem model is used to establish the hysteresis model of a piezoelectric actuator.A research on close-loop precision positioning control using the established Duhem model as a feed forward segment of a PID feed-back control is conducted.Experimental results show that this model can effectively eliminate the effects of nonlinearity and hysteresis which affect the displacement output precision of a piezoelectric actuator

and improve the dynamic response property.