Research ontTracking performance of digital two-loops position servo system

Speed sampling error depressed the systempsilas performance, which was a universal problem in traditional position servo system composed of position, speed and current closed loops. On the base of conventional position servo system, a novel digital position servo system merely with outer position-loop and inner current-loop is proposed in this paper, which has excellent dynamic performance for no speed-loop delay. The proposed system is very suitable for point-to-point movement control. Moreover, exactly trajectory tracking control, typically represented by trapezoid response, is properly proved by the experiments.