基于故障树知识的汽车故障诊断推理

Failure Diagnosis and Reasoning Based on Fault Tree Knowledge

故障树是一种倒置的逻辑关系图,发展历史长,技术成熟,具有标准的知识结构。同时也是故障诊断专家系统问题求解策略的形式化方法。基于这种形式化方法的故障诊断专家系统可在一定程度上减小知识表示和获取的困难。本文就故障树在汽车故障诊断专家系统开发中的应用进行讨论,着重研究故障树在专家系统中的表示和基于故障树知识的诊断推理机制。本文开发的系统在实现时主要考虑结合DBMS技术,并用非逻辑语言C++实现。

Fault tree is a kind of graph in which the events have reverse logic relationship. It is well developed with a long history and standard knowledge structure. Fault Diagnosis Expert System based on this method can somewhat reduce the difficulty in representing and acquiring knowledge. The application of fault tree in automobile fault diagnosis expert system is discussed in this paper. The stress is put on the presentation of fault tree and the mechanism of diagnosis and reasoning. The expert system developed is incorporated with DBMS technique and is implemented by illogic program language C++.