中文摘要：

针对某型导弹液压系统故障的特点，设计了故障诊断专家系统。重点介绍了专家系统的总体结构、知识库的设计和知识的表示方法、推理策略。系统属于基于规则的产生式系统，采用关系模式来描述知识库，用数据库方法存储管理知识库，以改善知识库的性能。系统采用了模块化设计方案，便于管理和维护。

英文摘要：

The fault diagnosis expert system has been designed in allusion to the characteristics of hydraulic system fault of some missile in this paper. And focus on the overall structure and knowledge base of design and knowledge representation and reasoning of the expert system. The system is rule-based production system, and relation schema is used to describe the knowledge base. The database method has been used to store and manage the knowledge base. The system has adopted the module design plan to improve the property of knowledge base. and it is easy to manage and maintain.