绕月SAR天线热控设计

Thermal Control Design of Lunar SAR Antenna

合成孔径雷达(SAR)天线是遥感卫星的重要载荷之一,面对月球轨道舱外天线复杂的外热流环境,结合轨道特点,对天线开展了详细的外热流分析,解析了月球环境的热设计难点,进行了针对性的热控设计,解决了极地轨道下天线在一个很大的外热流和极小的外热流间不断循环的问题。采用TMG软件对天线进行了热仿真分析,并利用热模拟件进行了热平衡试验。分析和试验结果表明,天线各单机温度满足指标要求。本文适用于平板SAR天线,对有源SAR天线的热控设计具有一定的借鉴意义。

Synthetic aperture radar(SAR)antenna is one of the important loads of remote sensing satellites.In the face of the complex external heat flow environment of the antenna outside the lunar orbital module,combined with the characteristics of the orbit,the detailed external heat flow analysis of the antenna is carried out and the thermal design difficulties of the lunar environment are analyzed.The targeted thermal control design is carried out too,which solves the problem that the antenna circulates continuously between a large external heat flow and a small external heat flow in the polar orbit.The thermal simulation analysis of the antenna is carried out by using TMG software,and the thermal balance test is carried out by using the thermal simulator.The analysis and test results show that the temperature of each single antenna meets the index requirements.This paper is applicable to the planar SAR antenna and has certain reference significance for the thermal control design of active SAR antenna.