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空间环境下,材料出气引起的分子污染效应是影响飞行器寿命和可靠性的重要因素之一。本文就材料出气分子经历的出气、在空间的传播输运和沉积三个过程及有诸多污染出气源存在时,对敏感表面沉积量的影响等进行了研究。建立了针对飞行器敏感系统功能表面在轨分子污染沾染量的预估模型。并利用该理论模型,结合相机镜头结构和空间环境的使用条件,模拟计算其镜头表面在轨飞行期间的分子污染物沾染量随时间变化的结果,同时理论计算结果结合试验测试数据评估相机镜头的在轨使用业绩。结果表明,镜头由于分子污染物沉积引起光学透过率的衰减达30%以上。所得到的结论对完善飞行器的防污染设计,提高飞行器在轨期间安全和性能保障具有重要的参考意义。
Under the space environment, the molecular pollution effect caused by the material outlet is one of the important factors that affect the life and reliability of the aircraft. In this paper, the gas exiting gas experiencing the exit, the space in the transport and deposition of three processes and the presence of many polluting gas source, the impact of the deposition of sensitive surface were studied. A prediction model for the contamination of on-orbit molecular contamination on the functional surface of the aircraft sensitive system was established. The theoretical model was used to simulate the effect of the contamination on the surface of the lens during orbital flight with the use of the camera lens structure and the space environment conditions. The theoretical calculation results combined with the experimental test data to evaluate the effect of the camera lens On track performance. The results show that the lens due to the deposition of molecular contaminants caused by the optical transmittance attenuation of more than 30%. The conclusions obtained have important reference significance for improving the anti-pollution design of the aircraft and improving the safety and performance of the aircraft in orbit.