高分辨率立体测绘相机系统热控设计及验证

高分辨率立体测绘相机的光学系统及探测器的温度稳定性影响测绘相机的测绘精度。针对透射式光学系统，采用多级外热流抑制技术，使星相机透镜的温度稳定性提高了6倍；针对反射式光学系统，采用间接辐射式控温等热控技术，使主镜、次镜的温度稳定性达到±0.3℃；针对大功率电荷耦合元件（CCD），采用基于环路热管（LHP）的节能型控温技术，在满足温度指标的前提下使环路热管驱动功率的周期平均值由60 W降低至33.8 W，同时节省约40%的主冷凝器面积及质量；针对CMOS，采用两级温度波动抑制技术，使其温度稳定性达到±0.3℃。研究了地面热试验的方法，报告了测绘相机系统关键部组件在极端空间环境下的在轨数据，全面验证了热控设计方法的正确性。

Thermal control design and verification for high resolution stereo mapping camera system

The temperature stability of optical system and detector of high precision stereo mapping camera affects the mapping accuracy of mapping camera. For transmission optical system, multi-stage external heat flow suppression technology is adopted to improve the temperature stability of the star camera lens by 6 times; for reflective optical system, thermal control technologies such as indirect radiation temperature control are adopted to make the temperature stability of the primary and secondary mirrors reach ±0.3 ℃; for high-power charge-coupled device (CCD), energy-saving temperature control technology based on loop heat pipe (LHP) is adopted to make the LHP driving power cycle average from 60 W to 33.8 W, while saving about 40% of the primary condenser area and mass; for CMOS, using two-stage temperature fluctuation suppression technology, the temperature stability is ±0.3 ℃. The method of ground thermal test was investigated, and the flight temperature data of key components of the mapping camera system under extreme space environment were reported, which fully verified the correctness of the thermal control design method.