空间相机反射镜SiC/Al支撑板轻量化结构优化设计  

Lightweight structure design for SiC/Al supporting plate of space mirror

作　　者：齐光[1] 许艳军[1] 刘炳强[1] 

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》2014年第7期2214-2218,共5页Infrared and Laser Engineering

基　　金：国家863计划(863-2-5-1-13B)

摘　　要：在保证空间光学遥感相机反射镜组件结构刚度、位置精度、面形精度的同时,最大限度地降低反射镜支撑板的质量,是轻量化设计的一个重要内容。提出了通过拓扑优化确定反射镜用SiC/Al材料的背部支撑板轻量化形式的方案。采用有限元分析法对获得的优化结果进行分析。分析结果表明:重力载荷下面形精度达到λ/10 PV,λ/50 RMS(λ=632.8 nm),PV值13.3 nm,RMS值2.9 nm,反射镜组件一阶固有频率239Hz,均优于传统结构形式的反射镜。拓扑优化的方法获得的轻量化背部支撑板能够满足使用要求。To meet the requirements of high location accuracy and surface figure accuracy for space mirror set, reducing support weight extremely at the same time becomes the new important research subject in most countries. A topological optimization design for a space mirror support lightweight was presented in this paper. By using finite element analysis technique, the static stiffness of the mirror was analyzed. The analysis results show that the surface accuracy reaches λ/10 PV, λ/50 RMS （λ=632.8 nm） under gravity load, PV value is 13.3 nm, RMS values is 2.9 nm, the mirror component first-order natural frequency is 239 Hz, which is better than traditional structure forms of mirrors, and can meet the application requirements.

关 键 词：空间相机 反射镜支撑板 轻量化 有限元分析 

分 类 号：V445.8[航空宇航科学与技术—飞行器设计] TH16[机械工程—机械制造及自动化]