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本文首先根据同步卫星抛物面天线的空间环境,讨论了在空间冷热环境试验中测量抛物面变形(位移)的几种方案;针对目前切实可行的应变片测量法,推导出了旋转抛物面温度变形的位移表达式;最后对几个实例进行了计算和讨论;并提出了建议。该位移表达式可供设计工作者根据抛物面天线在空间环境中预计的温度和己知的线伸缩系数估算反射面的温度位移。
In this paper, several schemes for measuring paraboloid deformation (displacement) in space thermal and thermal environment experiments are discussed according to the space environment of satellite parabolic antennas. Aiming at the practical strain gage measurement method, the displacement of paraboloid deformation is deduced Finally, several examples are calculated and discussed, and some suggestions are put forward. The displacement expression allows the designer to estimate the temperature displacement of the reflecting surface based on the predicted temperature in the space environment of the parabolic antenna and the known linear expansion coefficient.