中国空间科学技术

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午夜太阳入侵对FY-4辐射计次镜组件的温度影响

刘振宇;程惠尔;孙敬良;   

  1. 上海交通大学工程热物理研究所;上海航天技术研究院;
  • 发布日期:2008-10-25

Effect of Midnight Solar Intrusion on Temperature of Second Mirror Assembly of FY-4 Radiometer

Liu Zhenyu1 Cheng Huier1 Sun Jingliang2(1 Institute of Engineering Thermophysics,Shanghai Jiaotong University,Shanghai 200240)(2 Shanghai Academy of Spaceflight Technology,Shanghai 200235)   

  • Online:2008-10-25

被引次数

2

摘要： 对"风云四号"(FY-4)地球静止气象卫星辐射计建立三维热分析计算模型,采用有限元分析软件I-DEAS/TMG对辐射计进行在轨温度计算,分析午夜太阳入侵(midnight solar intrusion)对辐射计次镜组件的温度影响。计算结果表明,在太阳倾角为0°和±23.45°时,午夜太阳入侵对次镜的温度影响最为强烈,次镜温度在该时段能够达到最高温度。在太阳倾角为±8.8°,午夜太阳入侵现象对次镜座和次镜支撑的温度影响较为强烈。

关键词: 辐射计, 次镜组件, 热分析, 三轴稳定卫星

Abstract: The thermal calculating model of radiometer on the meteorological satellite FY-4 was established and temperature variations of the second mirror assembly were calculated by I-DEAS/TMG software.The effect of midnight solar intrusion on the temperature of the second mirror assembly was investigated.The calculation results show the highest temperature of the second mirror occurs during the period of local midnight when the solar declination is 0°or 23.45°.When the solar declination is 8.8°,the midnight solar intrusion has more effects on the temperature of the spider and housing of second mirror assembly than that of any other period.