空间光学遥感器主反射镜轻量化及支撑设计_续强.pdf

28 1 Vol.28, No. 1 2007 1 Journal of Applied Optics Jan., 2007 : 1002-2082(2007) 01-0043-04 1, 2 1 1, 2 1 1 1 续　强 , 王延风 , 周　虎 , 董吉洪, 李　威, 徐抒岩 ( 1. , 130033; 2. , 100039) 摘　要:　为了得到某空间光学遥感器主 射镜合理的结构及支撑方式, 检验新型光学材料SiC 的光学性能, 尤其是应用于空间光学系统的可行性,通过建立该空间光学遥感器主 射镜组件的 虚拟样机, 采用有限元仿真的方法, 分析主 射镜在背部采取不同形式轻量化情况下的质量及质 心位置。建立几种主 射镜的有限元模型,采用合理的MPC 约束边界条件,用有限元方法分析主 射镜在加工、测试状态下自身重力作用对 射面面形精度的影响。经过仿真比较及轻量化优化 设计, 得到 一种主 射镜及支撑的合理化结构, 轻量化率达到 75. 6% , 射镜面RMS 值为 12.53 nm,P v 值为54.52 nm 。最后的分析结果表明: 质量、刚度及 射镜面精度均满足工程要求。 关键词:　主 射镜;轻量化;有限元法;MPC : TN203:A Design and analysis of lightweight structure and support for primary mirror of space optic remote sensor 1, 2 1 1, 2 1 1 1 XU iang , WANG Yan-feng , ZHOU Hu , DONG Ji-hong , LI Wei , XU Shu-yan ( 1. Changchun Institute of Optics, Fine M echanics and Physics, Chinese Academy of Science, Changchun 130033, China; 2. Graduate School, Chinese Academy of Science, Beijing 100039, China) Abstract: In order to achieve a proper structure and support for the primary mirror used in the space optic remote sensor and test theoptical performanceof a new optic material (SiC) , 3D sol- id models were built for the primary mirror subassemblies. The mass and the center-of-mass of the primary mirror are analyzed for the different lightweight structures used on the backside of the mirror with the finite-element simulation method. Several finite-element models of the pri- mary mirror were built with appropriate MPC boundary constraint. The effect of the mirror weight on its s