针对基于规则的专家系统推理速度慢的问题,提出了一种对规则形式的知识库进行转化的方法。该方法利用故障树技术,将规则库转化为一个索引库和若干个限定范围的规则库。前者用于快速推理,实现由征兆直接到结论的推理,而后者是与结论相关的规则集,需要解释时可以使用。该方法有效地缩小了专家系统的搜索空间,其计算简单,可以离线进行,适用于复杂系统的在线故障诊断。 Aiming at the problem of rule-based expert system reasoning being slow, a method of transforming rule-based knowledge base is proposed. The method uses the fault tree technique to transform the rule base into an index base and several limited rule base. The former is used for quick reasoning to achieve reasoning directly from the indication to the conclusion, which is a set of rules that are relevant to the conclusion and can be used when needed to explain. The method effectively reduces the search space of the expert system and is simple to calculate and can be performed offline. It is suitable for on-line fault diagnosis of complex systems.