Digital photogrammetry for thermal deformation of satellite structures in normal environment

XU Jie; JIANG Shan-ping; YANG Lin-hua; XIAO Da-zhou; ZHANG Jing-chuan

doi:10.3788/OPE.20122012.2667

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Digital photogrammetry for thermal deformation of satellite structures in normal environment

Article | 更新时间：2020-08-13

- Digital photogrammetry for thermal deformation of satellite structures in normal environment
- Optics and Precision Engineering Vol. 20, Issue 12, Pages: 2667-2673(2012)
- 作者机构：
  
  1. 北京卫星环境工程研究所, 北京 100094
  2. 北京空间机电研究所,北京 100076
- 作者简介：
- 基金信息：
- DOI：10.3788/OPE.20122012.2667
  CLC： P232;V416.5
- Received：07 August 2012，
  
  Revised：12 October 2012，
  
  Published：10 December 2012
- 稿件说明：
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许杰, 蒋山平, 杨林华, 肖大舟, 张景川. 卫星结构件常压热变形的数字摄影测量[J]. 光学精密工程, 2012,20(12): 2667-2673

XU Jie, JIANG Shan-ping, YANG Lin-hua, XIAO Da-zhou, ZHANG Jing-chuan. Digital photogrammetry for thermal deformation of satellite structures in normal environment[J]. Editorial Office of Optics and Precision Engineering, 2012,20(12): 2667-2673
许杰, 蒋山平, 杨林华, 肖大舟, 张景川. 卫星结构件常压热变形的数字摄影测量[J]. 光学精密工程, 2012,20(12): 2667-2673 DOI： 10.3788/OPE.20122012.2667.

XU Jie, JIANG Shan-ping, YANG Lin-hua, XIAO Da-zhou, ZHANG Jing-chuan. Digital photogrammetry for thermal deformation of satellite structures in normal environment[J]. Editorial Office of Optics and Precision Engineering, 2012,20(12): 2667-2673 DOI： 10.3788/OPE.20122012.2667.

摘要

针对卫星光学系统在轨工作时机上相机和星敏感器受温度影响其相互间夹角会出现变化而影响相机指向精度的问题

利用数字摄影测量方法在试验室常温常压环境下对结构件进行了热变形测量试验。通过拍摄组合体结构件上相机和星敏器的特定表面标志点

计算了坐标值

拟合了光轴矢量。以相机之一为基准计算法线矢量差和不同工况下矢量差的变化

即夹角在各工况下的变形量。试验按照试件温度状态分为4个工况、20个子工况。测量结果显示最大变形量为227.9

测量精度优于13.9;与有限元分析比对

两者在各子工况的变化趋势一致

均方值为30.4。得到的结果表明

通过用合理选择拍摄位置、剔除粗大误差以及将编码标志点作为公共点进行坐标系转换等方法

可以提高数字摄影测量系统的测量精度

满足卫星结构件热变形测量的需求。

Abstract

As the angles among the optical systems of cameras and star sensors would be changed when a satellite worked on orbits in space environments

this paper proposed a method to measure the angles to improve the orientation precision of cameras. A thermal deformation test for the changed angles of these structures was performed under air pressures and normal temperatures. The digital photogrammetry was used to take the pictures for signed positions on the cameras and star sensors and to calculate coordinates and fit the given planes. By taking a camera as the scale

the angles and their variations were calculated in different working conditions. Results show that the maximum thermal deformation is 227.9under 4 working conditions and 20 sub-working conditions with different temperature distributions

and the test precision is better than 13.9. The result is very close to that of the finite element analysis

and the RMS between them is 30.4. It suggests that the precision of digital photogrammetry could be improved by choosing proper signed positions in photos

eliminating gross errors and taking coordinate conversion with code targets. The method satisfies test requirements for thermal deformation of the satellite structures.

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references

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