中国光学Issue(1)：99-106,8.DOI:10.3788/CO.20150801.0099
空间遥感器高体份SiC／Al复合材料反射镜组件设计
Design of high volume fraction SiC/Al composite mirror in space remote sensor
摘要
Abstract
The difference of linear expansion coefficient between a mirror and its support structure causes mir -ror thermal deformation which influences the surface accuracy of mirror and the image quality of optical sys -tem.In order to avoid above influence , the high volume fraction SiC/Al composite is chosen as the only mate-rial of aΦ600 mm mirror component .TheΦ600 mm mirror structure parameters are specified by the reasona-ble mechanical design and finite element analysis .Using finite element analysis method , the static and dynam-ic characteristics of the mirror component are analyzed .Under the gravity load of 1 g, the surface figure accu-racy of the high volume fraction SiC/Al composite mirror reaches RMS 12.6 nm, 12.7 nm, 12.6 nm, in X, Y, Z respective direction, nearlyλ/50(λ=632.8 nm).The mechanical dynamic test results verify the struc-tural performance and the capability of vibration resistance .The 1 st order natural frequency of the mirror com-ponent is 556.6 Hz.After the test, the surface figure accuracy changs from RMS 0.021λto 0.025λ, not showing obvious changes .The high volume fraction SiC/Al mirror can reach the same design indexes as SiC mirror and meet the space application requirements .关键词
空间遥感器/空间反射镜/高体份SiC/Al复合材料/有限元分析Key words
space remote sensor/space mirror/high volume fraction SiC/Al composite/finite element analysis分类
航空航天引用本文复制引用
齐光,王书新,李景林..空间遥感器高体份SiC／Al复合材料反射镜组件设计[J].中国光学,2015,(1):99-106,8.基金项目
国家高技术研究发展计划（863计划）资助项目 （）
