基于数据库的汽车发动机故障诊断专家系统

Expert System for Fault Diagnosis of Vehicle Engine based on Database

基于数据库的汽车发动机故障诊断专家系统根据故障层次模型,将知识库分为上下级,上级库确定故障可能位置,下级库作具体推理。SQL语言作为推理机的核心,在部件级知识库中寻找与之匹配的规则,用部件级知识对设备状态进行推理判断,并用可信度计算法获得其可信度,得出诊断结论。

In expert system for fault diagnose of vehicle engine based on database, knowledge database can be divided into two levels, higher-up database confirms location of fault, lower lever database does specific reasoning according to fault levels model. SQL was used as kernel of reasoning, the rule was looked for suited with parts in parts level knowledge database, state of equipment was reasoned and judged with parts level knowledge. The reliability was calculated with calculation method to diagnose conclusion.