Firstly, the architecture of spacecraft fault diagnosis is proposed hierarchically with four diagnosis frames, i.e., system level, subsystem level, component level and element level.

• 首先 ；提出了航天器故障诊断的层次诊断结构 ；给出了 4类诊断框架 ；即系统级诊断框架、分系统级诊断框架、部件级诊断框架和零件级诊断框架 .