空间微小颗粒对卫星光学器件的污染研究

空间微小颗粒以低于临界黏附速度撞击卫星光学镜头时会附着在其表面,当大量的微粒黏附在卫星镜头上时会影响镜头的探测性能。精确计算临界黏附速度及找出影响临界黏附速度的因素对研究空间污染效率有着重要意义。在简化的EA模型的基础上,文章仿真分析了铜和石墨微粒撞击卫星镜头过程中的黏附力和临界黏附速度。结果表明:镜头表面粗糙度修正系数CR是影响黏附力和临界黏附速度的重要参数;在相同条件下,虽然石墨微粒受到的最大黏附力比铜微粒的小,但石墨微粒的临界黏附速度比铜微粒的高,说明石墨微粒更有可能黏附于镜头表面。

The contamination of satellite optical device by space microparticles

Space microparticles may adhered to the satellite camera might disrupt its detective performance. When the impact velocity of mocroparticles is lower than the critical adhesion velocity, the microparticles will adhere to the surface of the satellite camera. It is significant to determine the critical adhesion velocity and find the factors that affect the critical adhesion velocity with regard to the space pollution. Based on the simplified EA model, the adhesion force and the critical adhesion velocity of copper and graphite microparticles during the impact process are simulated and analyzed. The results indicate that the surface roughness correction factor is an important parameter influencing the adhesion force and the critical adhesion velocity. Under the same conditions, the graphite microparticles, even though its largest adhesion force is smaller than that of copper particles, has a higher critical adhesion velocity than that of copper particles, suggesting that graphite microparticles are more likely to adhere to the surface of the camera.