2 m级望远镜跟踪架控制系统动态性能分析  

Dynamic analysis of two meters telescope mount control system

作　　者：邓永停[1] 李洪文[1] 陈涛[1] DENG Yong-ting;LI Hong-wen;CHEN Tao(Changchun Institute of Optics,Fine Mechanics and Physics, Chinese Academy of Sciences,Changchun 130033,China)

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033

出　　处：《光学精密工程》2018年第3期654-661,共8页Optics and Precision Engineering

基　　金：国家自然科学基金青年基金资助项目(No.11603024)

摘　　要：为了增强望远镜的抗风载扰动能力,提高望远镜跟踪架的跟踪精度,本文对2m望远镜跟踪架伺服控制系统的动态性能进行了测试和分析。首先,采用正弦扫描信号对望远镜跟踪架的结构和伺服系统进行了频率特性测试;其次,采用基于观测器/卡尔曼滤波器的辨识算法,对跟踪架控制系统的频率特性进行了模型辨识;最后,依据辨识获得的控制模型设计了位置和速度控制器,然后对2m望远镜跟踪架伺服控制系统进行了目标观测实验,实验结果表明:当跟踪最大速度为3.5(°)/s,最大加速度为1(°)/s^2的目标时,方位轴和俯仰轴的最大跟踪误差均小于4.5",跟踪误差的RMS值分别为0.378 6"和0.151 6",实验验证了跟踪架控制系统的良好性能。In order to enhance the ability of disturbance rejection for the telescope,and improve the tracking accuracy of the telescope mount control system,this paper analysis the dynamic of mount control system for the two meters telescope.Firstly,the frequency response of telescope mount control system is test using swept sine.Secondly,the Observer/Klaman filter algorithm is employed to identify the model for the mount control system.Finally,the position controller and speed controller are designed based on the mount control model.The experimental results of target observation show that max tracking errors of the azimuth and elevation axis are less than 4.5",and the tracking error RMS[JP2]are 0.378 6"and 0.151 6",when the target moving with the max speed 3.5(°)/s[JP]and the max acceleration 1(°)/s 2.The experiments verify the good dynamic of telescope mount control system.

关 键 词：望远镜 频率响应 模型辨识 伺服系统 

分 类 号：TH743[机械工程—光学工程] TP273[机械工程—仪器科学与技术]