提高大口径望远镜控制系统闭环带宽的方法  

Methods of improving closed-loop bandwidth for large telescope control systems

作　　者：邓永停[1] 李洪文[1] 王建立[1] Deng Yongting;Li Hongwen;Wang Jianli(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：《红外与激光工程》2018年第12期340-348,共9页Infrared and Laser Engineering

基　　金：国家自然科学基金青年科学基金(11603024)

摘　　要：为了提高大口径望远镜的抗风载扰动能力和对目标的跟踪精度,要求望远镜控制系统有较好的动态性能和稳态跟踪精度,望远镜的闭环控制带宽决定了控制系统的跟踪性能。因此,首先根据望远镜结构的二质弹簧质量模型,分析影响望远镜控制系统闭环带宽和动态响应的因素,进而介绍提高闭环控制系统带宽的两种方法:结构滤波器方法和加速度反馈控制方法;然后,详细分析了结构滤波器的设计方法及其望远镜控制系统中的应用;最后,分析了基于加速度反馈控制的设计方法以及该控制策略对提高望远镜控制系统闭环带宽的有效性。通过实验结果可以看出,加速度反馈控制方法对提高望远镜镜控制系统闭环带宽更加有效。In order to improve the performance of perturbation rejection and the accuracy of tracking for the large telescope,the control system of the telescope needs to have a good dynamic performance,which is due to the closed-loop bandwidth.Firstly,the factors that affect the close-loop bandwith and the dynamics of the telescope control system were analyzed,which were based on the two-mass spring-mass model of the telescope structure,and then two methods including structural filter and acceleration feedback methods which could improve the closed-loop bandwith of the control system,were introduced.Secondly,the application of the structural filter and acceleration feedback methods in the telescope control system was analyzed in detail.Lastly,the related problems that the structural filter was used in the telescope control system were analyzed and the effectiveness of acceleration-feedback control for improving the closed-loop bandwidth was introduced.The experimental results demonstrate that compared with the structural filter method,the acceleration-feedback provides a better technology to improving the closed-loop bandwidth of control system for the large telescopes.

关 键 词：大口径望远镜 闭环带宽 结构滤波器 加速度反馈 

分 类 号：TP391.8[自动化与计算机技术—计算机应用技术]