Study on high precision positioning of actuator system integrating PMSM with ball screw

Abstract

　Ballscrew drive system has non-linear friction elements, so it makes ballscrew control accuracy worse. It is also required to construct a mechanism with robustness against any disturbance including nonlinear friction. And the system integrating PMSM with ballscrew leads toughness more increasing, so it is able to make higher output. But the motor becomes affected more directly by disturbance, it is more increased requirements of high precision driving.
　In this paper, we target that realizing high precision positioning servo system without affected disturbance, we experimentally considered improving control response from a view of motor control by applying variable gain controller and feed forward control.