空间用长寿命自浮动电连接器原子氧侵蚀效应仿真研究

低地球轨道原子氧与航天器表面材料相互作用，可导致材料因氧化剥蚀而发生性能衰退。文章针对空间机械臂用某型长寿命自浮动电连接器，采用自主编写的计算软件，结合地面模拟试验获得的材料剥蚀率数据，对原子氧侵蚀效应进行仿真分析。仿真结果可直观显示电连接器表面各部分所受原子氧侵蚀的厚度分布。地面试验验证表明，经注量为7.83×1022 cm-2的原子氧辐照后，电连接器室温下绝缘电阻大于1×105 GΩ，满足技术要求。研究结果可为空间站用电连接器的设计和寿命预测提供参考。

Simulation of atomic oxygen erosion of long-life self-floating electrical connector

The interaction between the atomic oxygen in the low-Earth orbit and the spacecraft surface materials may degradate the material properties due to the oxidation and the erosion effect. In this paper, with a model of the space long-life self-floating electrical connector, the atomic oxygen erosion is simulated, with the erosion rate of the material obtained from the ground simulation test, to determine the atomic oxygen erosion thickness distributions on the surface of the rectangular connector. The ground validation test shows that after the atomic oxygen irradiation with a fluence of 7.83×1022 cm-2, the insulation resistance of the electrical connector is more than 1×105 GΩ at room temperature, well satisfying the technical requirements. This research provides a reference for the design and the life time prediction of the electrical connector for the space station use.