Inertial piezoelectric actuator driven by symmetrical sawtooth wave and method for achieving bi-directional motion thereof

摘要

An inertial piezoelectric actuator driven by symmetrical sawtooth wave is symmetrical in structure and includes a seat, a slider, a piezoelectric stack and an elliptical ring. A pair of leaf-shaped flexible beams are arranged at a front end of a base, and a guide rail is connected between the pair of leaf-shaped flexible beams. The slider is placed on the guide rail. The piezoelectric stack is arranged in the elliptical ring with an interference fit. A front end of the elliptical ring is in contact with the guide rail, and a pre-stressed contact force between the elliptical ring and the guide rail is controlled by adjusting a screw at a rear end of the elliptical ring. A method for method for actuating bi-directional motion of the inertial piezoelectric actuator is further provided.