【摘要】 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。更多还原

【Abstract】 In space environment,molecular contamination is an important influence factor on spacecraft life and reliability.The influence of deposition on sensitive surface is studied with existence of the processes of outgassing,transferring and deposition experienced by outgassing molecules of the material and multi-contamination sources. A model and software of outgassing,transferring and deposition is established.Camera lens molecular contaminative deposition is calculated.It can be used to predict camera lens performance on orbit with experiment data.The results indicate that transmittance of the camera lens is attenuated by 30%due to molecular contaminative deposition.It is very important for spacecraft’s structure design and material protection.更多还原