第21卷
专第6期 2013年6月
文章编号
1004-924X(2013)06-148808
光学精密工程
Optics and Precision Engineering
Vol. 21No. 6
Jun.2013
空间相机1m口径反射镜组件结构设计
徐宏，关英俊2*
（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；
2.长春工业大学机电工程学院，吉林长春130012)
摘要：针对1m口径空间相机反射镜的设计要求，提出了一种新的反射镜柔性支撑结构，以材料选择、径厚比、支撑点数量和位置、轻量化结构形式等为设计变量，以自重作用下反射镜面形精度rms值为目标函数，优化设计了一种背部开口、三角形轻量化孔、背部三点支撑的SiC空间反射镜结构，同时提出了一种反射镜柔性支撑结构。对反射镜在光轴水平状态下进行装调检测时影响反射镜面形精度的柔性支撑结构参数进行了灵敏度分析，找到了影响反射镜面形精度的结构参数。对反射镜组件动、静态特性和热特性进行了有限元分析，分析结果表明，光轴水平方向重力载荷作用下反射镜面形精度rms达到5.6nm，4C均匀温升工况下反射镜面形rms为2.7nm，反射镜组件一阶周有率为192Hz，最后，进行了反射镜组件的动力学测试试验，测得反射镜组件一阶固有频率为197Hz、最大明应应力为181MPa，验证了有限元
分析的准确性。得到的结果显示该反射镜组件完全满足设计指标要求。关键调：空阔相机；主反射镜：柔性支撑，有限元分析；动力学测试
中图分类号：V447.3
文献标识码：A
doi;10.3788/OPE.20132106.1488
Structuraldesignof1mdiameterspacemirror
componentofspacecamera
XUHong',GUANYing-jun
(l.Changchun Institute of Optics,FineMechanics and Physics, ChineseAcademyofSciences，Changchun130033，China;
2.School of MechatronicEngineering,Changchun University of Technology,Changchun 130012,China)
*Correspondingauthor,E-mail:gyj5460@sohu.com
Abstract: A novel flexible support structure for the l-m primary mirror of a space camera was intro duced, By taking the material selection, diameter-thickness ratio, number and positions of support points, and lightweight forms as design variables and the surface figure accuracy rms of the mirror un-der the self-weight as objective function, a kind of back opening SiC space mirror with triangle light-weight holes and three-point support on the back was designed optimally. Then, the flexible support structure was designed for the primary mirror. Through sensitivity analysis, the parameters of flexi-ble support structure that effect on rms of mirror were found when its optical axis was on the horizon-tal state. By using finite element method, the dynamic and static stiffnesses as well as thermal charac-
收稿日期：2013-01-05；修订日期：2013-02-13，
基金项目：国家863高技术研究发展计划资助项目（No.2009AA7020107)