摘要
主反射镜组件力学性能是相机结构设计的重点。文章介绍了反射镜组件的基本构型,分析了采用Bipod支撑结构的反射镜组件振动抑制的必要性。基于阻尼受迫振动模型微分方程,分析了频率比、阻尼比对随机振动传递率的影响,根据分析结果选择增大阻尼比作为反射镜组件振动抑制方案。对某1.8m口径反射镜组件进行了抑振设计,利用MSC Nastran软件进行了动力学分析,仿真结果显示,抑振后反射镜动力学响应值及振动应力有较大降低,证明抑振设计有效。文章设计的振动抑制解决方案也可为空间遥感器其他部组件的振动抑制设计提供借鉴。
The mechanical characteristics of primary mirror（PM）assembly is the design focus in the structure designing. This paper introduces three kinds of mirror assembly, analyzes the necessity of vibration damping for the mirror assembly with Bipod support. Based on the forced vibration model, the paper analyzes the vibration influence of the frequency ratio and the damping ratio, and then choose the damping ratio as the main method for vibration suppression. Finally, the damping structure of a 1.8m aperture mirror with Bipod support is designed, and the dynamics response is obtained with finite software MSC Nastran. The simulation results showe that this kind of design is available.
出处
《航天返回与遥感》
北大核心
2015年第3期40-47,共8页
Spacecraft Recovery & Remote Sensing
关键词
阻尼模型
大口径
反射镜组件
发射段环境
振动抑制
航天遥感
damping model
large aperture
mirror assembly
launch environment
vibration suppression
space remote sensing
