高空气球平台地-月成像光谱仪载荷系统热设计

为满足搭载于高空气球平台的地-月成像光谱仪的长时观测需求，对其载荷系统进行了热设计。分析了载荷系统的热环境，建立了载荷系统的换热模型，利用Spearman等级相关系数公式以及反向传播神经网络与Garson公式结合的BP-Garson方法对影响载荷系统温度水平的主要参数进行了全局灵敏度分析，详细阐述了载荷系统的热设计方案。利用I-DEAS/TMG软件建立了载荷系统的有限元模型，对冬至、夏至两工况进行了仿真分析。仿真结果显示:在冬至与夏至工况下，气球放飞2 h内光谱仪均能快速降温至-5℃，光谱仪维持（-52）℃温度水平大于3.5 h，光学窗口温度高于海拔20 km当地露点温度，满足设计指标，热控方案合理。该研究方法对球载光学遥感器的热设计具有一定的指导和借鉴作用。

Thermal design of Earth-Moon imaging spectrometer load system for high-altitude balloon platform

In order to meet the long-term observation requirements of the Earth-Moon imaging spectrometers mounted on the high-altitude balloon platform, the thermal design was presented. The corresponding thermal environment of the load system was analyzed, the heat transfer model of the load system was established, and the sensitivity analysis of the main parameters affecting the temperature level of the load system was carried out by using Spearman rank correlation coefficient formula and the BP-Garson method combining backpropagation neural network with Garson formula. The thermal control pattern of the load system was depicted clearly. In addition, the finite element model of the load system was built and the spectrometers' two working conditions, the December solstice and the June solstice conditions, was simulated by using the I-DEAS/TMG software. The simulation results indicate that under two working conditions, the spectrometers can quickly cool down to -5℃ within 2 h, and the spectrometers maintain the temperature level of (-52)℃ for more than 3.5 h, the optical window temperature is higher than the local dew point temperature at the altitude of 20 km, which satisfies the requirements and the thermal design is reasonable. The research jobs could give some guidance and reference for other ball-loaded optical remote sensors.