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工程设计学报
Chinese Journal of Engineering Design  2007, Vol. 14 Issue (2): 148-152    DOI:
    
Analysis on solar radiation heat flow on surface of antenna reflector on orbit
CHEN  Zhi-Hua1,2，GUAN  Fu-Ling1
1. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310027, China; 2. College of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China
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Abstract  Solar radiation heat flow is the biggest influence leading to reflector surfaceof on-orbit antenna’s deformation and its declination on electrical performance. Aiming at the geometric characteristics of the reflector and timedependence of antenna orbit position, parameters of angle between solar radiation light and orbit surface and time of antenna’s entering and leaving the earth shallow are discussed. In light of paraboloid equation and sunlight radiationvector, analysis on self-occlusion of parabolic antenna is carried out by adopting geometric method and then corresponding judging references are given. Meantime, unchangeable direction of antenna reflecting surface when facing ground is achieved by utilizing coordinate transformation. This method implements real-time analysis of solar radiation heat flow on parabolic antenna reflector on-orbitand makes it possible to accurately analyze its thermal deformation and thermalflutter.

Key words： antenna reflector      solar radiation      heat flow      self-occlusion      earth shadow     
Published: 28 April 2007
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CHEN Zhi-Hua
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Cite this article:

CHEN Zhi-Hua，GUAN Fu-Ling. Analysis on solar radiation heat flow on surface of antenna reflector on orbit. Chinese Journal of Engineering Design, 2007, 14(2): 148-152.

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https://www.zjujournals.com/gcsjxb/     OR     https://www.zjujournals.com/gcsjxb/Y2007/V14/I2/148


星载抛物面天线反射器太阳辐射热流分析

太阳辐射是在轨抛物面天线反射器产生变形并导致其电性能下降的重要因素。针对天线轨道位置的时变性及抛物反射器的几何特点，讨论了太阳辐射光线与轨道面的夹角、进出地球阴影区的时刻等参数。根据抛物面方程以及太阳光辐射向量，运用几何方法分析抛物面天线的自遮挡作用，并给出了相应的判据，同时利用坐标变换实现天线反射面的对地指向不变。该方法实现对在轨抛物面天线反射器的太阳辐射热流的实时分析，为准确分析反射器的热变形或热颤提供条件。

关键词： 天线反射器,  太阳辐射,  热流,  自遮挡,  地球阴影 
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