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地球静止轨道星载光通信天线在每天午夜时分存在太阳光入侵问题,为分析太阳光入侵对天线的温度场影响,建立了地球同步轨道通信卫星的激光通信终端热分析模型,对光学天线进行在轨温度仿真。计算结果表明,当太阳光倾角为±8.8°时,午夜太阳光入侵对主、次镜的温度影响高于太阳光倾角为0°的时段。光学天线太阳光规避策略可有效减小午夜太阳光入侵对其温度的影响,当机动角度为40°时,选取“零点前2.0h开始机动/零点后2.5h停止机动”的时刻组合可获得最长的连续工作时间。
The problem of solar intrusion in the geostationary space optical communication antenna at midnight every day exists. To analyze the influence of solar intrusion on the temperature field of the antenna, a thermal analysis model of the laser communication terminal of the geosynchronous orbit communication satellite is established. Rail temperature simulation. The calculated results show that the mid-night solar intrusion affects the temperature of the primary and secondary mirrors more than the solar dip angle of 0 ° when the dip of the sun is ± 8.8 °. Optical antenna solar escaping strategy can effectively reduce the impact of midnight sun intrusion on its temperature, when the maneuvering angle of 40 °, select the “zero 2.0h before starting maneuver / 2.5h cease maneuver after zero” combination of time Get the longest continuous working time.