Design of a New Rotary Micropositioning Stage Driven by Piezoelectric Actuator

This paper presents the design of a new rotary micropositioning stage, which is actuated by a linear-type piezoelectric stack actuator. This structure realizes a large enough output angle by introducing lever displacement amplifiers. This work also includes innovative designs for accepting the force and displacement of PZT. Moreover, it avoids undesired displacement by adopting symmetrical structure design. The proposed design also exhibits a compact structure, which provides convenience in practical application. Finite-element analysis is conducted with simulation study to verify the performance of the presented rotary micropositioning stage.