光学精密工程2011，Vol.19Issue(5)：1039-1047,9.DOI:10.3788/OPE.20111905.1039
长条形空间反射镜及其支撑结构设计
Design of rectangular space mirror and its support structure
摘要
Abstract
A flexible support structure was proposed to keep the higher surface figure accuracy of space mirrors under gravity and uniform temperature change load cases. According to the optical design requirements, the structural form of a mirror was determined, and then a flexible support structure of the primary mirror was designed. By adopting finite element analysis software, the mirror component was analyzed and its structure was optimized. Analysis results show that the first order natural frequency of the mirror component is 179 Hz, and the surface figure accuracy RMS of the mirror reaches 5.06, 4.43 and 7.59 nm when gravity load is applied in the directions of X, Y, and Z axes, respectively. Furthermore,the integrated surface figure accuracy RMS of the mirror reaches 6.08, 6.32 and 8.08 nm respectively under the load cases of gravity in three directions coupled with uniform temperature rise of 4 ℃. Laboratory test results indicate that the mirror can offer a good image quality under the condition of 4 ℃ uniform temperature change, and the mechanical test results are consistent with that of the theoretical analysis. The change of the surface figure accuracy is not obvious after dynamic and thermal vacuum tests. Analysis and experimental results demonstrate that designs of the mirror and its support structure are effective, which can meet the requirements of space applications.关键词
空间反射镜/轻量化/柔性支撑/有限元分析/动力学测试Key words
space mirror/ lightweight/ flexible support/ finite element analysis/ dynamic test分类
机械制造引用本文复制引用
李志来,徐宏..长条形空间反射镜及其支撑结构设计[J].光学精密工程,2011,19(5):1039-1047,9.基金项目
国家863高技术研究发展计划资助项目(No.2009AA7020107) （No.2009AA7020107）
