空间辐射环境模型不确定性对ITO/Kapton/Al薄膜防静电性能评价分析

INFLUENCE OF SPACE RADIATION MODEL UNCERTAINTIES ON THE ELECTRICAL PROPERTY EVALUATION OF ITO/KAPTON/AL FILM

空间辐射环境模型的不确定性,对航天器防静电热控材料的防静电性能评价带来影响。首先对空间辐射环境模型的不确定性来源进行了分析,对不确定因子进行了定义,接着对电子和质子辐照环境下ITO/Kapton/Al防静电热控材料的表面电阻率变化规律进行实验研究,进而对空间辐射环境模型的不确定性对ITO/Kapton/Al防静电热控涂层的表面电阻率的影响进行分析。研究表明:随着辐照注量的增加,不同的不确定度对热控材料防静电性能的影响先增加后减小,最后影响基本可以忽略;不确定性对热控材料防静电性能的影响随着不确定因子的增大而增大;当不确定因子小于1时,空间辐射环境模型不确定性对防静电热控材料表面电阻率评价带来的相对偏差为正,当不确定因子大于1时,则为负。

Space radiation model uncertainties may have important influence on the evaluation of anti-electrostatic property of thermal control materials.The sources of space radiation model uncertainties are analyzed and the uncertainty factor is defined firstly,then the simulation test was performed on the surface resistivity of ITO/Kapton/Al film in electron or proton radiation environments.After that,the influence of space radiation model uncertainties on the surface resistivity of ITO/Kapton/Al film was analyzed.As the increase of irradiation fluence,the influence of space radiation model uncertainties on the surface resisitivity increases firstly and then decrease until it can be ignored.The influence of space radiation model uncertainties on surface resisitivity of ITO/Kapton/Al film increases with the uncertainty factor.When the uncertainty factor lower than 1,the error from space radiation model uncertainty to surface resisitivity of ITO/Kapton/Al film is positive,while the uncertainty factor larger than 1,the error is negative.