Centerpart deformation influence on large aperture telescope’s altitude axis precision

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Centerpart deformation influence on large aperture telescope’s altitude axis precision

Article | 更新时间：2020-08-12

- Centerpart deformation influence on large aperture telescope’s altitude axis precision
- Optics and Precision Engineering Vol. 17, Issue 10, Pages: 2401-2405(2009)
- 作者机构：
  
  长春光机与物理研究所
- 作者简介：
- 基金信息：
- DOI：
  CLC： TH752
- Received：15 October 2008，
  
  Revised：21 November 2008，
  
  Published Online：20 October 2009，
  
  Published：20 October 2009
- 稿件说明：
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赵勇志,张景旭,吴小霞. 大型望远镜四通变形对俯仰轴系[J]. 光学精密工程, 2009,17(10):2401-2405

Centerpart deformation influence on large aperture telescope’s altitude axis precision[J]. Optics and precision engineering, 2009, 17(10): 2401-2405.
赵勇志,张景旭,吴小霞. 大型望远镜四通变形对俯仰轴系[J]. 光学精密工程, 2009,17(10):2401-2405 DOI：

Centerpart deformation influence on large aperture telescope’s altitude axis precision[J]. Optics and precision engineering, 2009, 17(10): 2401-2405. DOI：

摘要

摘要：为了解决大型望远镜俯仰轴系检测精度不能达到系统指标，而系统运转性能却优异的问题。本文通过对影响1m望远镜俯仰轴系精度主要因素—中间体（四通）进行了有限元分析和运算，得出四通在不同俯仰角度的变形曲线，并与实际检测结果进行对比，找出两者的相同特征进行补偿。按此方法使得望远镜俯仰轴系晃动误差PV值从2.42″降到0.95″，RMS值从0.7″降到了0.3″，提高了系统精度模型的准确性。

Abstract

Altitude axis precision is important to performance of large aperture telescope. At practice

the tested result can not reach the system requirement

but the performance is well enough. The main reason is the deformation of centerpart. In this paper

1m telescope’s centerpart is analyzed by the FEM

and then finding the Altitude axis max deformation versus pitch angle curve is sinusoidal curve

that is the same as the tested results curve. We also calculate the influence of deformation on axis precision .We use the compensation method: add the tested results to calculated result. By this way

the PV error of axis shake is reduced from 2.42″ to 0.95″

the RMS error is reduced from 0.7″to 0.3″

the system precision model is improved.This can provide theory of even larger telescope’s design and test.

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Related Institution

College of Science, Nanjing University of Science and Technology

Advanced Launching Co-innovation Center, Nanjing University of Science and Technology

Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China

Graduate School of the Chinese Academy of Sciences, Beijing 100039

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