天体测量技术及应用研究组知识库

光杠杆角编码器检测装置用于角编码器的误差检测,可提高天文望远镜的运动控制精度。该装置需要较高精度的转动控制,并实现自动检测。根据该检测装置的功能要求,以可编程多轴运动控制器(PMAC)为核心,设计了角编码器检测装置的控制系统,搭建了控制系统的硬件平台,编写了控制系统的应用软件,实现了CCD曝光与码盘数据采集的同步。实验结果表明:该装置转台的重复定位误差绝对值小于4″,满足角编码器检测系统的要求。

The light lever detector can be used to detect error of angular encoder so as to improve precision of motion control of astronomical telescope. The device needs to achieve high precistion of rotation control and automaic detection. According to the functional requirements of the detecting device, the control system of the angle encoder detection device is designed based on the programmable multi-axis motion controller (PMAC), hardware platform of the system is built, and the application software of the control system is compiled, and the synchronous between the CCD camera and data acquisition and exposure the encoder is implemented, Experimental results indicate that absolute value of repetitive positioning error of the turntable is less than 4", which meet the requirements of the encoder detection system.