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遥感相机在轨运行过程中要面临复杂的空间热环境,为了保证相机的成像质量,必须对其进行有效的热设计。介绍了遥感相机热控设计的主要理论,分析了某大型三反离轴相机的特殊性对热设计的影响及对策。总结了相机的在轨温度情况,并采用热模型仿真的方法获取了无温度遥测位置的温度结果。在轨分析结果表明,相机关键部位的温度均在20℃±2℃的温度指标范围内,证明了相机热控设计的正确性。
Remote sensing cameras face complex thermal environments in orbit, and in order to guarantee the imaging quality of the cameras, they must be effectively thermally designed. The main theory of thermal control design of remote sensing camera is introduced, the influence of the particularity of a large triaxial camera on thermal design and its countermeasures are analyzed. Summed up the camera’s on-orbit temperature conditions, and the use of thermal model simulation method to obtain the location of temperature-free telemetry temperature results. The on-orbit analysis shows that the temperature of the key parts of the camera is within the temperature range of 20 ℃ ± 2 ℃, which proves the correctness of the thermal control design of the camera.