基于关键事件的系统级单点故障识别方法及应用

系统级单点故障严重影响航天器任务的成败。为全面识别系统级单点故障模式，文章提出了基于时域空域分析、故障树分析（FTA）和故障模式影响分析（FMEA）相结合的关键事件系统级单点故障识别方法，并在交会对接任务中得到了应用。通过对识别的单点故障模式相关设备采取在轨补偿措施或过程控制措施，降低了任务风险，保证了交会对接任务的成功。该故障识别方法具有一定工程应用价值。

The system level single point failure identification based on critical incident

In order to identify the system level single point failure(SPF) which affects the mission of the spacecraft, an SPF identification method based on the critical incident is proposed and used in the rendezvous and docking (RVD) mission. In this method, the time domain and the space domain analyses of incident events, the fault tree analysis (FTA) and the failure mode and effect analysis (FMEA) are integrated to identify the SPF. And then, the failure preconception in orbit or the quality control methods are applied to point to the equipment which has the SPF. The application results show that the SPF identification method is effective in the RVD mission and similar engineering projects.