中国空间科学技术

中国空间科学技术 ›› 2024, Vol. 44 ›› Issue (2): 136-144.doi: 10.16708/j.cnki.1000-758X.2024.0030

• 论文 • 上一篇    下一篇

GEO卫星相机外遮光罩的设计方法

刘飞，赵艳彬，宋效正，陆国平，唐琪佳，张红英   

  1. 上海卫星工程研究所，上海201109
  • 出版日期:2024-04-25 发布日期:2024-04-09

Design method of outer baffle in GEO satellite camera

LIU Fei，ZHAO Yanbin，SONG Xiaozheng，LU Guoping，TANG Qijia，ZHANG Hongying   

  1. Shanghai Institute of Satellite Engineering，Shanghai 201109，China
  • Published:2024-04-25 Online:2024-04-09

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摘要： 针对太阳规避模式下相机最小太阳规避角及相机视场大导致遮光罩尺寸超出火箭整流罩可用包络的问题，研究了基于非成像时长和偏航姿态调整方案的相机遮光罩最小太阳规避角算法，提出了三块挡光板构型和圆形外遮光罩构型的方程建模及上沿优化方法，并针对典型工况仿真设计出了具有同等太阳规避效果的多种斜切外遮光罩构型。经Pro/E软件建模及阴影分析表明，在各工况下，外遮光罩与内遮光罩对内遮光罩底部的遮挡比例达到100%，也即太阳无法直射内遮光罩底部，验证了外遮光罩方程建模及上沿优化方法的正确性，并实现了以传统圆筒外遮光罩1/3的面积规避太阳直射相机内部的效果。

关键词: 太阳规避, 非成像时长, 偏航姿态, 斜切外遮光罩, 阴影分析

Abstract: In view of the least sun avoidance angle of the camera，and the large baffle beyond the fairing cap，the algorithm of the least sun avoidance angle based on non-imaging duration was studied when the satellite avoids the sun by yaw attitude maneuver.Then，the outer baffle′s modeling equations based on three panels and the cylinder were proposed.It also offered optimization method of the panels′ upper edge.Kinds of scarfed outer baffle were designed in typical condition with the same effect of sun avoidance.After the outer baffles′ 3D modeling in Pro/ E and shadow analysis，the results show that the shadow ratio is 100% when solar elevation angle is at various degrees.It means that the bottom of inner baffle will not be shined.This verified the correctness of outer baffle′s modeling equations and the optimization method of the panels′ upper edge.The article achieved the effect of sun avoidance with 1/3 area of traditional cylinder outer baffle.

Key words: sun avoidance, non-imaging duration, yaw attitude, scarfed outer baffle, shadow analysis