伺服滑台的精度控制

Precision Control of Servo Sliding Table

介绍伺服滑台驱动系统的构成,分析出影响其定位精度的主要误差来源有电机定位误差、齿轮齿条副的齿隙和减速器的回程间隙。通过对各项主要误差来源的影响因素和控制方法分析,提出提高伺服滑台定位精度的典型方法:一是通过直接降低各项主要误差实现任意位置精确定位;二是通过引入外置辅助机械定位机构提高滑台在特定位置的定位精度。

This paper introduces structure of servo sliding table drive system,analyzes and identifies the main error sources affecting the positioning accuracy,such as the motor position error,the backlash of the rack and pinion as well as the return clearance of the reducer.Based on the analysis of the influence factors of the main error sources and the control methods,the paper proposes the typical methods to improve the positioning accuracy of the servo sliding table:firstly,directly reduce the main errors for the precise positioning of any position;secondly introduce an external auxiliary mechanical positioning mechanism to improve the positioning accuracy of the sliding table in a specific position.