关键词: 卫星, 热控涂层, 退化, 长寿命, 热控设计

Abstract: Since the medium and high orbit satellites have long on-orbit time and obvious temperature rise at the end of life, equivalent comprehensive degradation performance of the common coating OSR is studied through analyzing 5-year in-orbit temperature data of a MEO navigation satellite. Its thermal control design and orbit solar flux are taken into account, and how the radiating surface design influences the temperature variation in long term is also discussed. In this way, thermal control design can be optimized, and long-life as well as highly reliable design scheme can be obtained. OSR′s comprehensive degradation performance in this paper is appropriate for thermal control design and temperature prediction, which also shows that the method of solar flux normalization proposed here can be applied to study coating comprehensive degradation and in-orbit temperature variation. Analysis of the radiation surface design′s influence on long-term temperature rise and some design suggestions based on it have engineering reference value for the long-life operation of medium and high orbit satellites.

Key words: satellite, thermal control coating, degradation, long life, thermal control design