Redesrch And Application Of Tank Fire Control System Fault Diagnosis Expert System Based On Rule And Case D-S Evidence Fusion

With the rapid development of technology in various industries,the performance of tanks in our country has been greatly improved.However,with the improvement of tank performance,the equipment complexity has been constantly improved,which brings great challenges to tank maintenance,detection and fault diagnosis.Tank fire control system is the pivot of tank fire control,which determines the output of tank fire and directly affects the combat capability of tank.Therefore,improving the reliability and stability of tank fire control system is of great practical significance and value to the completion of our army's combat mission and the improvement of tank troops'combat capability..Firstly,a fault diagnosis reasoning method based on production rules is proposed.The production rules of tank fire control system are obtained by establishing fault tree for each component of tank fire control system and qualitative and quantitative analysis of fault tree.According to the similarity between production rules with confidence factor and factual conditions,the reliability of the conclusions of the rules is obtained.Then,the knowledge representation form of matrix is created,and the source case in the case knowledge base is expressed in the form of matrix.By calculating the similarity between the case to be diagnosed and the single attribute in the source case and the overall similarity,the similarity between the case with diagnosis and each source case is finally obtained.Finally,the rule-based reasoning results and case-based reasoning results are fused by D-S evidence theory.According to the actual situation,the identification framework and basic probability assignment function of D-S evidence fusion are determined,the problems existing in fusion are analyzed,and the problem of "one vote veto" and high conflict between evidence is improved.The final diagnosis result is the result with the highest support after fusion.Compared with the traditional maintenance methods,the method studied in this paper greatly improves the efficiency of fault diagnosis.By comparing the results of single diagnosis method with D-S evidence fusion diagnosis method,the validity of D-S evidence fusion is proved,the accuracy of fault diagnosis is improved,and the rate of misdiagnosis and missed diagnosis is reduced.The functions of the fault diagnosis expert system are realized by using C#programming software and SQL server database,which enables the general operators to diagnose the fault of tank fire control system in combination with the system.