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在航天器故障诊断系统的开发方面提出了一些新观点 .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 .其次 ,提出了一个层次诊断模型 ,该模型有 4个层次组成 ,即传感器层、功能层、行为层和结构层 ,这些层协同工作以实现故障报警、故障诊断和故障定位 .再次 ,提出了面向故障树的基于框架和广义规则的混合知识表示方法及相关的推理策略 .最后把故障树和专家系统开发工具G2结合起来并给出了一个航天器电源系统的诊断案例 .
Some new ideas are put forward in the development of spacecraft fault diagnosis system.Firstly, a hierarchical diagnosis structure of spacecraft fault diagnosis is proposed, and four kinds of diagnosis framework are given, which are system-level diagnosis framework, subsystems-level diagnosis framework, component level Diagnosis framework and part-level diagnosis framework.Secondly, a hierarchical diagnosis model is proposed, which consists of four layers: sensor layer, functional layer, behavioral layer and structural layer, which work together to achieve fault alarm, fault diagnosis and Fault location.Furthermore, a hybrid knowledge representation method based on framework and generalized rules for fault tree and related inference strategy are proposed.Finally, the fault tree and expert system development tool G2 are combined to give a diagnosis of spacecraft power system Case.