运用模糊逻辑的火炮故障诊断专家系统

本文将模糊逻辑理论引入军械装备故障诊断问题的研究,给出火炮故障诊断专家系统(FDESG)的设计方法与实现技术。通过对火炮维修专家模糊思维特点的分析,在FDESG的设计中,对模糊知识库的组织采用因果网络表示法实现的分层、分块式结构;将火炮维修专家在处理问题使用的模糊知识抽象为事实性知识和诊断性知识,并分别采取了二元组和模糊规则的表示方法;提出一种多层正反向混合模糊推理策略.以模拟专家的模糊推理过程;设计出-一组计算结论不确定性的传播函数,而且为使其表现形式易于被用户所接受,还提出一种基于Minkowski距离的语言近似方法。

THE DIAGNOSIS EXPERT SYSTEM OF GUN BASED ON FUZZY LOGIC

In this paper we introduce the theory of fuzzy logic into the study of ordnance equipment diagno- sis expert system, and give the designing method and realizing technique of the Gun Diagnosis Expert System based on Fuzzy Iogic(FDESG). Through analizing the thinking characteristic of the gun diag- nosis expert, the form of fuzzy knowledge in FDESG is the structure of hierarchy and chunks by the cause and effect net representation method; the fuzzy knowledge used by. the diagnosis expert are fac- tual knowledge and diagnostic knowledge which are corresponding with the two tuple and the rule rep- resenting method respectively; in the fuzzy inference engine of FDESG, we put forward the multi- class forward-backward fuzzy reasoning approach which simulate the reasoning process of the expert; the uncerctainty of the conclusion is calculated by the propagating function, and in order to make the expressing way of this uncertainty easy to be accepted by the user, we raise a linguistic approximate method based on the Minkwoski distant.