Application of Bipod to supporting structure of minitype reflector

ZHANG Li-min; WANG Fu-guo; AN Qi-chang; YANG Fei; WANG Zhi

doi:10.3788/OPE.20152302.0438

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Application of Bipod to supporting structure of minitype reflector

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- Application of Bipod to supporting structure of minitype reflector
- Optics and Precision Engineering Vol. 23, Issue 2, Pages: 438-443(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. 中国科学院大学北京,中国,100049
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20152302.0438
  CLC： TH112.5;TH703
- Received：07 March 2014，
  
  Revised：20 May 2014，
  
  Published：25 February 2015
- 稿件说明：
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张丽敏, 王富国, 安其昌等. Bipod柔性结构在小型反射镜支撑中的应用[J]. 光学精密工程, 2015,23(2): 438-443

ZHANG Li-min, WANG Fu-guo, AN Qi-chang etc. Application of Bipod to supporting structure of minitype reflector[J]. Editorial Office of Optics and Precision Engineering, 2015,23(2): 438-443
张丽敏, 王富国, 安其昌等. Bipod柔性结构在小型反射镜支撑中的应用[J]. 光学精密工程, 2015,23(2): 438-443 DOI： 10.3788/OPE.20152302.0438.

ZHANG Li-min, WANG Fu-guo, AN Qi-chang etc. Application of Bipod to supporting structure of minitype reflector[J]. Editorial Office of Optics and Precision Engineering, 2015,23(2): 438-443 DOI： 10.3788/OPE.20152302.0438.

摘要

设计了一种由3组Bipod组成的柔性支撑结构

用于提高在实际工作条件下小型反射镜的面形精度。首先

利用伴随变换建立了Bipod及由其组成的支撑结构的柔度矩阵;利用MATLAB优化Bipod的结构参数

以满足径向刚度最小时轴向刚度最大的要求。然后

对优化后的支撑结构施加力和热载荷进行了仿真验证。最后

利用zygo干涉仪验证该支撑结构的热稳定性。结果表明

Bipod柔性支撑结构在保证反射镜良好热稳定性的同时

可以有效降低外界动态载荷对反射镜的影响;不仅具有良好的动态特性

且能在力热耦合载荷下保持较好的面形。分析显示其1阶固有频率达到1 781.7 Hz

与理论计算相比

相对误差约为1%。

Abstract

A flexible supporting structure composed of 3 Bipods was designed to enhance the surface accuracy of a minitype reflector in complex environments. Firstly

the flexibility matrixes of the Bipods and whole support structure were established through matrix transformation and the defining design variables of the Bipods were optimized through MATLAB to meet the requirements of maximum of the axial stiffness when the radial stiffness was minimum. The simulation verification was then performed by applying different forces and thermal loads to the optimized supporting structure. Finally

a zygo interferometer was employed to verify the thermal stability of the supporting structure. The results show that the Bipod support structure keeps a fine surface accuracy under a thermal-structural load

meanwhile providing excellent dynamic performance. Except for giving the reflector a better thermal stability

the support rigidity of the structure resists the impact of the environmental dynamic load on the reflector. Moreover

the analysis indicates that the first order natural frequency of the flexible supporting structure is 1 781.7 Hz

and the relative error is 1% as compared with that of the theoretical calculation.

关键词

Keywords

references

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中国科学院长春光学精密机械与物理研究所

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