空间相机超轻次镜环境适应性分析及试验

Environmental Adaptability Analysis and Experiment of Ultra Light Second Mirror of Space Camera

环境适应性分析主要指空间相机各部组件适应地面装调阶段重力、温度、强迫位移等因素以及发射阶段振动环境影响的能力。通常采取有限元仿真分析与试验相结合的方法对产品性能进行评估。本文介绍了某空间相机超轻次镜及柔性支撑结构设计情况,通过有限元分析得到了产品在重力载荷、温度载荷、胶缩影响等工况下的反射镜RMS值。然后对部组件进行了动力学分析,最后通过环境试验对有限元分析结果正确性和设计合理性进行了验证。结果表明,该超轻次镜及柔性支撑结构能够适应地面装调阶段各因素的影响,并且能够适应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 environmental adaptability analysis mainly refers to the ability of each component of the space camera to adapt to gravity,temperature and forced displacement in the stage of ground assembly and the vibration influence of launch.Usually,finite element simulation analysis and test are combined to evaluate the product performance.This paper introduces the design of ultra light secondary mirror and flexible supporting structure of a pace camera.Through finite element analysis,the RMS of secondary mirror under the influence of gravity load,temperature load and assembly error is obtained.Then,the dynamic analysis of the components is carried out.Finally,the correctness of the finite element analysis results and the rationality of the design are verified by the mechanical environment test.The results show that the ultra light secondary mirror and the flexible supporting structure can adapt to the influence of various factors in the stage of ground assembly and adjustment,and can adapt to the requirements of the dynamic environment during launch,which proves the correctness of the design and simulation analysis methods.