扫描镜精密伺服系统的数字控制研究

Research on Digital Control of Scanning Mirror Precise Servo System

针对扫描镜精密伺服系统 ,本文采用按照电流环、速度环和位置环等三个回路进行控制系统设计的开闭环复合控制方案。在位置环回路中 ,实现系统解耦控制、并以四点中心差分法和非线性积分算法改进传统的微分和积分运算 ,从而提出一种新型的数字控制器结构。

The scanning mirror precise servo system is designed by the scheme of compound con- trol of open and closed loops with current,velocity and position loops in this paper.When designing position loop,ideally derivative and integral controllers are modified by four points difference and nonlinear integral algrithms except that the system is decoupled.Thus,this kind of new digital con- troller is presented.The experiment results prove that the system characteristics are greatly im- proved by the modified control scheme and algrithms.