小口径空间相机的力学环境适应性分析与试验  

Analysis and Verification on Adaptability in Mechanical Environment for Small Aperture Space Camera

作　　者：付强强 孙欣[1] 汪巧萍[1] FU Qiang-qiang;SUN Xin;WANG Qiao-ping(Beijing Institute of Space Mechanics&Electricity,Beijing 100094)

机构地区：[1]北京空间机电研究所

出　　处：《环境技术》2019年第4期8-14,共7页Environmental Technology

基　　金：国家重点研发计划地球观测与导航重点专项（2016YFB0500802）

摘　　要：空间相机的力学环境适应性主要指空间相机适应地面装调阶段重力和发射阶段振动环境的能力,通常采用有限元仿真结合试验验证的方法对其进行评估。文中介绍了某小口径空间相机的反射镜组件及其支撑结构的设计情况,建立了该空间相机的有限元模型。重点研究了光机集成分析中镜面节点的位移数据处理方法,使得有限元结构分析的数据可以为光学软件调用,进而分析了在光轴水平装调时重力对光学系统传递函数的影响。然后对空间相机进行了模态分析和频响分析,得到了相机的动态刚度特性。最后,对空间相机进行了振动试验及性能测试。结果表明,该小口径空间相机能够适应在不采取重力卸载措施时光轴水平的地面装调状态,相机基频与振动响应满足发射时的动力学环境要求,证明了设计与仿真分析方法的正确性。The mechanical environment adaptability of space camera mainly refers to the ability of space camera to adapt to the gravity and vibration environment during the ground assembly and launching stage.Usually,it is evaluated by finite element simulation combined with experimental verification.In this paper,the design of mirror components and their supporting structures of a small aperture space camera is introduced,and the finite element model of the space camera is established.The displacement data processing method of mirror nodes in optical-mechanical integrated analysis is studied,which makes the data of finite element structural analysis available for optical software.The influence of gravity on the optical system is analyzed when the optical axis is horizontally.Then the modal analysis and frequency response analysis of the space camera are carried out,and the dynamic stiffness characteristics of the camera are obtained.Finally,the vibration test and performance test of the space camera are carried out.The results show that the small aperture space camera can adapt to the assembly state when the axis is in horizontal without gravity unloading measures,and the basic frequency and vibration response of the camera can meet the dynamic environment requirements when launching,which proves the correctness of the design and simulation analysis methods.

关 键 词：小口径 空间相机 光机集成分析 力学分析 

分 类 号：V445.8[航空宇航科学与技术—飞行器设计]