激光与光电子学进展, 2015, 52 (6): 062203, 网络出版: 2015-04-20  

消旋K镜反射镜支撑结构设计 下载: 507次

Design of Support Structure for K Mirror
作者单位
中国科学院长春光学精密机械与物理研究所, 吉林 长春 100876
摘要
针对地平式望远镜消旋K 镜系统中子反射镜支撑问题,设计了一种三点底支撑及芯轴侧支撑的联合支撑方法,并对该支撑结构展开了深入的仿真分析与实验研究。根据圆形反射镜径厚比与反射镜自重变形的关系,确定了反射镜的厚度。根据反射镜运动学安装原理,设计了柔性底支撑加芯轴侧支撑的结构,芯轴侧支撑环具有柔性切槽,柔性环节确保底支撑与侧支撑应力互不干涉。通过有限元软件Ansys 建立反射镜参数化模型,优化了三点底支撑及侧支撑粘结位置,并且分析了反射镜支撑面形精度。进行了反射镜粘接实验,搭建了反射镜面形检测实验平台,进行了反射镜支撑面形精度检测实验。实验结果表明:反射镜面形精度均方根(RMS)值为12 nm、峰谷值(PV)为76 nm,接近仿真分析结果。实验结果验证了消旋K 镜子反射镜的支撑结构具有正确性与可行性,并满足系统设计要求。
Abstract
Aiming at the problem of support structure for K mirror in Alt- az telescope, the union support structure which includes three- point bottom support and side support is designed, and the experimental study about support structure is completed. According to the relation of radius-thickness ratio and shape change, the thickness of mirror is determined. Based on kinematics mount principle of mirror, the bottom and side support structure is designed, and the structure includes flexibility hinge which ensure that the support stress is not interference. Then, the parameter model of K mirror is established by Ansys software, the points of support position are optimized, and root mean square (RMS) of mirror surface diguer is obtained. Finally, the splice experiment is promoted, and platform of detection experiment is constructed. Experimental results indicate that the RMS of mirror is 12 nm, the peak valley (PV) of mirror is 76 nm, the experimental results are close to the simulation results. It can certify that the support structure of K mirror is validity and feasibility, and it accords with the design requirements of K mirror system.

张岩, 张景旭, 陈宝刚, 王富国, 徐伟. 消旋K镜反射镜支撑结构设计[J]. 激光与光电子学进展, 2015, 52(6): 062203. Zhang Yan, Zhang Jingxu, Chen Baogang, Wang Fuguo, Xu Wei. Design of Support Structure for K Mirror[J]. Laser & Optoelectronics Progress, 2015, 52(6): 062203.

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