论文部分内容阅读
航天器进入空间环境以后,空间环境分子污染和颗粒污染形成了航天器表面污染层,从而对航天器的各技术分系统产生不同的负面影响.介绍了中外中轨道航天器表面污染物质沉积变化在轨探测结果,并对污染物质沉积量变化和控制因子做初步评估.结果表明,污染物质沉积量在航天器入轨初期的1~2年内受航天器自身出气物质量、放气速率、表面温度及所处的气流方向等因子所控制.初期沉积量大,正是受到航天器入轨后自身出气量大、放气速率较高的控制,同时迎风面比背风面沉积量大.入轨后期表面沉积量长期变化呈现出明显的降变或缓慢涨落,而且具有全向性特征,因此探讨了具有全向性影响能力的控制因子相关特性,其中高能粒子通量和太阳紫外辐射通量变化可能是主要控制因子.
After the spacecraft entered the space environment, molecular pollution and particle pollution in the space environment formed the pollutant layer on the surface of the spacecraft, which had different negative impacts on the technical sub-systems of the spacecraft. The deposition and deposition of pollutants on the surface of spacecraft The results show that the deposition amount of pollutants is limited by the spacecraft’s own gas mass, deflation rate, surface temperature within 1 ~ 2 years of initial spacecraft orbit derailment, And where the air flow direction and other factors controlled the initial deposition of large, it is by the spacecraft into the orbit their own large amount of gas release rate control, while the windward than the leeward deposition of large amount. The long-term changes of surface deposition show obvious decreasing or slow fluctuations, and have the characteristics of omnidirectional characteristics. Therefore, the correlation characteristics of control factors with omni-directional influence are discussed. Among them, the changes of high energy particle flux and solar ultraviolet radiation flux May be the main control factor.