用气氮调温系统实现火星表面昼夜温度模拟

Simulation of Mars thermal environment by GN2 temperature adjustment system

为了实现修正火星探测器热模型,验证探测器在火星昼夜极端温度环境下的工作性能,需要在地面实现对火星温度变化的模拟。文章提出了通过气氮调温系统进行火星表面瞬态热环境模拟和温度控制的方法,目前已经实现150 Pa和1400 Pa低气压下-105～5℃的气体温度瞬态模拟,试验过程中与目标温度的最大温差不超过10℃,而且多个周期的重复性良好。

In order to optimize the thermal model of Mars rovers and to verify the system functions in the Martian extreme environments, it is necessary to test the Mars rover in a comprehensive simulated environment on the ground. On the Mars surface, the ambient temperature sees a great variation with the alteration of day and night. It is a difficult task to simulate the surface temperature of Mars on the ground. This paper propose a method by using the GN2 temperature adjustment system to realize the thermal environment simulation and the temperature control of the Mars＇ surface. The diurnal gas temperature simulation of Mars from -105℃ to 5℃ at a pressure of 150 Pa and 1400 Pa is realized in the transient way, with the maximal temperature difference not more than 10℃, and the repeatability error is comparatively low.