A basic study on the development of a highly accurate rotational positioning actuator.

The study deals with the development of a highly accurate rotational positioning actuator, based on the idea of an"Inchworm translator"for precise linear positioning. The actuator is designed for rotational motion and combines piezoelectric actuators with a stroke magnification mechanism. Based on experimentation, it is confirmed that the actuator correctly functions with a rotational resolution of less than 6.25×10-7 rad and a holding torque of more than 0.26 N·m. As a result, the actuator is shown to have the potential to become an accurate rotational positioning actuator.