光学精密工程2012，Vol.20Issue(12)：2667-2673,7.DOI:10.3788/OPE.20122012.2667
卫星结构件常压热变形的数字摄影测量
Digital photogrammetry for thermal deformation of satellite structures in normal environment
摘要
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. 9"under 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 require-merits for thermal deformation of the satellite structures.关键词
数字摄影测量/卫星结构件/热变形/平面拟合/精度分析Key words
digital photogrammetry/ satellite structure component/ thermal deformation/ plane fitting/ precision analysis.分类
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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):2667-2673,7.基金项目
十一五装备预先研究资助项目 （）
