空间光学载荷悬臂轻巧型光机系统设计  

Design of Lightweight Opto-mechanical System of Space Optical Load Cantilever

作　　者：谢新旺 殷龙海 李延伟 李骏驰 刘华秋 郭奥钿 Xie Xinwang;Yin Longhai;Li Yanwei;Li Junchi;Liu Huaqiu;Guo Aodian(Ji Hua Laboratory,Foshan 528200,Guangdong,China)

机构地区：[1]季华实验室,广东佛山528200

出　　处：《工程与试验》2023年第4期53-56,共4页Engineering and Test

摘　　要：为减轻空间光学载荷的体积与重量,并保证系统具有良好的温度适应性与动态刚度,设计了一种Φ400mm口径全SiC材料的悬臂轻巧型同轴光机系统。利用参数优化方法,将系统基频与反射镜面形精度RMS值作为优化目标,整机重量作为约束条件,支撑结构轴向厚度等相关参数作为设计变量,获得了三点悬臂式超轻同轴光机结构。通过仿真分析、振动试验与面形测试对悬臂式超轻同轴光机结构的合理性进行了验证,结果表明,光机系统重量仅为14kg,在20±4℃温度变化范围内系统波像差均为0.05λ(λ=632.8nm),系统基频为142.35Hz,与仿真分析结果138.04Hz相比,误差为3%,可以保证整机结构的稳定性。In order to reduce the volume and weight of space optical load,and ensure that the system has good temperature adaptability and dynamic stiffness,a lightweight coaxial optical mechanical system withΦ400mm diameter and full SiC material is designed.Using the parameter optimization method,the system fundamental frequency and surface shape accuracy RMS value as the optimization objective,and the weight of the whole machine as the constraint,the axial thickness of the support and other related parameters as the design variables,the three-point cantilevering ultra-light coaxial optical mechanical structure is obtained.The rationality of the cantilever ultra-light coaxial optical mechanical structure is verified by simulation analysis,vibration test and surface shape test.The results show that the weight of the optical mechanical system is only 14kg,the system wave aberration is 0.05λ(λ=632.8nm)in the temperature range of 20±4℃,the fundamental frequency of the system is 142.35Hz,the simulation analysis results is 138.04Hz,the error is 3%with the simulation analysis,which can ensure the stability of the whole machine structure.

关 键 词：光学载荷 光机系统 面形精度 参数优化 

分 类 号：TH703[机械工程—仪器科学与技术]