高分七号卫星激光测高仪热设计及验证

Thermal Design and Verification of Laser Altimeter for GF-7 Satellite

针对高分七号(GF-7)卫星激光测高仪的热设计任务需求,采用被动热控和基于环路热管的毛细泵驱流体回路技术,解决了光机结构高精度控温以及后光路组件热量收集、传输和排散的难题。在轨飞行数据表明:激光测高仪热控系统为光机系统成像和激光器工作提供了良好的温度条件;基于环路热管的毛细泵驱流体回路,实现了头部电子设备、4台激光器、后光路电子设备等多点热源热量收集、传输以及高精度控温。

According to the thermal design requirement of GF-7 laser altimeter,passive thermal control technology and capillary pump drive fluid loop based on loop heat pipe are adopted,to solve the precise thermal control of optical-mechanical component and the heat collection,transportation and dissipation of back electronics.The in-orbit flight data shows that the thermal control system provides good temperature condition for the optical-mechanical component and lasers.The heat collection,transportation and high precision temperature control of multi heat-source,which include the front electronics,4 lasers and the back electronics,can be realized based on the capillary pump drive fluid loop.