Abstract:
In order to ensure the stable operation of the aerial camera in the thermal environment of the stratospheric space, this paper carries out the thermal design and the verification of an aerial camera without payload module. Based on the characteristics of the convection and radiation environment outside the camera at an altitude of 20 km, the multi-layer thermal insulation component is selected as the camera skin material. The thermal control system of the load camera is designed, and the temperature field distributions under extreme conditions are analyzed using the finite element software. The final total thermal control power is designed as 240
W, with some space to enable the defrosting capability of the camera at the lens. Then, a low-pressure thermal balance test is carried out to verify that the test results are in good agreement with the simulation analysis results. The thermal control power accounts for about 70% of the total power under low temperature conditions, and the temperature fluctuation at the temperature control point is within ±1
℃, which meets the temperature accuracy requirements.