Structural design of 1.5 m mirror subassembly for space camera

LI Zhi-lai; XU Hong; GUAN Ying-jun

doi:10.3788/OPE.20152306.1635

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Structural design of 1.5 m mirror subassembly for space camera

更新时间：2020-08-13

- Structural design of 1.5 m mirror subassembly for space camera
- Optics and Precision Engineering Vol. 23, Issue 6, Pages: 1635-1641(2015)
- 作者机构：
  
  1. 中国科学院长春光学精密机械与物理研究所,吉林长春,中国,130033
  2. 长春工业大学机电工程学院,吉林长春,130012
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20152306.1635
  CLC： V447.3
- Received：20 August 2014，
  
  Revised：15 October 2014，
  
  Published：25 June 2015
- 稿件说明：
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李志来, 徐宏, 关英俊. 1.5m口径空间相机主镜组件的结构设计[J]. 光学精密工程, 2015,23(6): 1635-1641

LI Zhi-lai, XU Hong, GUAN Ying-jun. Structural design of 1.5 m mirror subassembly for space camera[J]. Editorial Office of Optics and Precision Engineering, 2015,23(6): 1635-1641
李志来, 徐宏, 关英俊. 1.5m口径空间相机主镜组件的结构设计[J]. 光学精密工程, 2015,23(6): 1635-1641 DOI： 10.3788/OPE.20152306.1635.

LI Zhi-lai, XU Hong, GUAN Ying-jun. Structural design of 1.5 m mirror subassembly for space camera[J]. Editorial Office of Optics and Precision Engineering, 2015,23(6): 1635-1641 DOI： 10.3788/OPE.20152306.1635.

摘要

研究了1.5 m口径空间相机反射镜组件的结构

设计了主镜组件结构系统.采用RB-SiC作为反射镜镜坯材料

分析并优化了反射镜支撑形式和镜体的结构参数

得到了重131.9 kg

轻量化率达到81%的反射镜结构.在主镜基本构型确定的基础上

设计了主镜支撑结构

通过合理设计柔性卸载结构满足了主镜结构系统的力、热环境适应性和抗振性要求.最后

利用有限元法综合分析了主镜组件的性能.试验结果表明:主镜在1

重力作用下的面形精度RMS达到0.025

(

=632.8 nm)

(20±4)℃温变环境中主镜面形变化量在RMS 0.01

范围内

主镜组件一阶固有频率为95.8 Hz

有限元分析结果的误差为4%.得到的结果表明主镜组件的静态刚度、动态刚度及热环境适应性完全满足设计指标要求.

Abstract

The subassembly of a 1.5 m diameter primary mirror in a space camera was researched and the structure system of subassembly for the primary mirror was designed. RB-SiC was chosen as the material of the primary mirror

the lightweight design

support scheme and the structure design of the concrete support were analyzed

and a mirror structure with a mass of 131.9 kg and lightweight ratio of 81% was obtained. The support structure of the primary mirror was designed after determining the basic configuration of the primary mirror. Then

a flexible support structure was reasonably designed to adjust the force

thermal environment adaptability and vibration resistance. Finally

the Finite Element Method (FEM) was used to analyze the performance of the subassembly of the primary mirror synthetically. The experimental results show that the surface figure accuracy(Root Mean Square

RMS) of the primary mirror reaches 0.025

(

=632.8 nm)under the action of gravity of 1

and the changed scope is 0.01

(RMS) in the (20±4) ℃ temperature environment. The first order natural frequency of the subassembly of the primary mirror is 95.8 Hz and the error obtained by the FEM is 4%. It demonstrates that the static stiffness

dynamic stiffness

and the thermal environment adaptability of the subassembly of the primary mirror have met the requirements of design criterion.

关键词

Keywords

references

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