光学学报, 2010, 30 (1): 1, 网络出版: 2010-02-01
能动镜中力驱动器的实现及性能测试
The Design and Performance Test of the Force Actuator Developed for the Active Mirror
自适应光学 能动镜 力驱动器 微位移驱动器 滚珠丝杆 PID控制 adaptive optics active mirror force actuator micro-displacement actuator ball screw PID control
摘要
用于能动镜中的力驱动器采用直流电机作为驱动源,经减速器后利用滚珠丝杆传动加弹簧组件实现纳米级微位移,而采用丝杆副实现自锁。驱动器基于拉压力传感器实现闭环控制,高增益的PID控制器克服了机械摩擦的微动特性获得比较好的线性度。用4个力驱动器和3个刚性支撑组成了一个能动镜原型样机,光学干涉仪测量结果表明,力驱动器平均位移分辨力约为10 nm、最大可变形量达±8 μm、最大驱动力达±700 N。实验结果证明了力驱动器应用于能动镜驱动器的可行性,为能动镜的实用化提供了实验依据。
Abstract
The force actuator developed for the active mirror uses DC-motor as driving source. Nanometer micro-displacement driving is achieved by means of gearbox,ball-screw-driven stage and groups of springs. Self-locking is performed by leading screw pair. The high gain PID controller based on pull-push force sensor in the feedback path can provide a sufficiently high loop gain to suppress effect of friction on micro-dynamic characteristics so that an excellent linearity is achieved. The actuators were tested in an active mirror prototype with four same actuators and three rigid supports. The measurement of micro-displacement was tested by an optical interferometer. The results of the prototype show that the average displacement resolution is 10 nm,max stroke is ±8 μm,max driving force is ±700 N. The experimental results show that the force actuator is suitable to drive an active mirror. This also provides basis for further optimization of actuator developed for active mirror.
凡木文, 邓建明, 周睿, 李梅. 能动镜中力驱动器的实现及性能测试[J]. 光学学报, 2010, 30(1): 1. Fan Muwen, Deng Jianming, Zhou Rui, Li Mei. The Design and Performance Test of the Force Actuator Developed for the Active Mirror[J]. Acta Optica Sinica, 2010, 30(1): 1.