Hα太阳空间望远镜热设计

Thermal design of Hα solar space telescope

Hα太阳空间望远镜具有对日光谱成像及全日面成像功能,具有多功能、高度集成化的特点。它位于卫星载荷舱内,在轨姿态多变,并且具有连续观测的工作模式,焦平面组件及电单机工作热环境苛刻,对热设计提出较高要求。通过星载一体化设计及相机结构合理布局,在卫星舱板靠近相机处预留辐射散热通道,合理设计散热面将工作热耗快速导出,保证各部组件温度满足指标要求。搭建热平衡试验平台,对高低温工况下的热分析和热平衡试验及在轨数据进行对比,同一工况下各电单机最大温差≤4℃,对热设计的正确性进行了验证。保证了Hα太阳空间望远镜在复杂空间环境下的正常工作,对此类空间太阳望远镜热控设计具有一定的借鉴意义。

Hα solar space telescope has the functions of solar spectral imaging and full-disk solar imaging,which is multi-functional and highly integrated. It is located inside the satellite payload cabin, its on-orbit attitude is changeable, and it has the working mode of continuous observation, which leads to the harsh thermal environment of focal plane assembly and electric boxes, and puts forward higher requirements for thermal design.Through the integrated design of the payload with satellite and the reasonable layout of the telescope’s structure,the radiation heat dissipation channel was reserved in the satellite payload cabin near the camera. The heat dissipation surface was reasonably designed to export the working heat consumption quickly, ensuring that the temperature of each component met the index. By building the thermal equilibrium test platform, the thermal analysis, thermal equilibrium test and in-orbit data was compared under high and low temperature conditions. The maximum temperature difference of each electric box under the same working condition was ≤4 ℃, the correctness of the thermal design was verified, which ensured the normal operation of Hα solar space telescope in complex space environment. It has certain reference significance for the thermal control design of such space solar telescope.