地球静止轨道空间星载激光通信光学天线热控技术  

Thermal Control Technology for Optical Antenna in Geostationary Orbit Space Satellite-Borne Laser Communication

作　　者：刘百麟[1] 周佐新[1] 李健[1] 谭立英[2] 

机构地区：[1]中国空间技术研究院通信卫星事业部,北京100094 [2]哈尔滨工业大学可调谐激光技术国家重点实验室,黑龙江哈尔滨150001

出　　处：《中国激光》2017年第3期221-229,共9页Chinese Journal of Lasers

基　　金：国家自然科学基金(11404082)

摘　　要：光学天线作为空间激光通信系统中的核心组件,应具有较好的温度场稳定性和均匀性。较大的天线口径和地球静止轨道空间外热流的复杂聚变,增大了天线温度场热控技术的难度。根据光学天线的构型特点和外热流的变化规律,基于光机热一体化协同设计,将空间高效热防护技术与光学镜面辅助热控技术相结合,实现了对大口径光通信天线温度场的稳定性与均匀性的长期精稳控制,并通过热实验进行验证。实验结果表明,强日照期对天线采取避光策略时,满足光通信天线温度场指标要求的时长大于14.3h/d,温度稳定控制在21.4~26.2℃范围内,主镜自身热差不大于1.3℃,主镜与次镜之间的热差不大于3.8℃,这些结果均高于稳定性与均匀性的指标要求。As the key component of space laser communication systems, optical antenna is required to have good stability and uniformity for temperature field. The thermal control technology for temperature field of antenna is facing more challenge owing to the large antenna aperture and the complex fusion of external heat flux in geostationary orbit space. According to the characteristics of antenna configuration and the discipline of external heat flux variation, the long-term fine stability control for the stability and the uniformity of antenna temperature field is achieved in large diameter optical communication when we combine the space efficient heat protection technology with the optical mirror aided thermal control technology, which is based on the design for optical, mechanical and thermal design. The proposed method is verified by thermal test. Experiment results show that in the case that the lucifugal strategy is taken for antenna to avoid direct sun, the duration is up to 14.3 h/d, which satisfies the request for antenna temperature. The temperature is controlled stably in the range of 21.4-26.2 ℃. The thermal difference of the primary mirror itself is not larger than 1.3 ℃, and the thermal difference between the primary mirror and the secondary mirror is not larger than 3.8 ℃. These results are larger than the required indexes of stability and uniformity.

关 键 词：光通信 地球静止轨道 星载 光学天线 热控技术 

分 类 号：TK121[动力工程及工程热物理—工程热物理]