Rolling Attitude Effect on High Resolution Space Camera Temperature

With the development of aerospace technology, spacecraft have a fast and good application demand, and there is an increasing number of sudden missions in orbit. Imaging of key areas is completed through attitude adjustment. The attitude adjustment disrupts the stable thermal environment of the spacecraft and affects the imaging accuracy of the spacecraft’s optical camera. High precision optical cameras need to have the ability to adapt to complex spatial thermal environments, which is the trend of future development. An optical camera was researched, and for the first time systematically analyzed the variation law of spatial heat flux, providing guidance for thermal design schemes. The optical camera conducted thermal analysis and thermal balance tests simultaneously, and the simulation results were consistent with the experimental data, verifying the correctness and effectiveness of the thermal design. The results indicate that the side sway has a relatively small impact on the temperature field inside the camera body, but a greater impact on the external light shield, and active thermal control can weaken the influence of the side sway on the external heat flux. To further reduce the impact of lateral sway on high-precision cameras, improvement measures have been proposed to guide the development of subsequent spacecraft: increasing the length of the light shield, such as a flexible light shield, to weaken the influence of external heat flow on the star’s internal light shield; Perform high-precision temperature control on key components to reduce the impact of complex heat flow.