Design of Diagnostic Expert System for Electronic System of General Equipment Based on FTA
Liu Yu · Acta Armamentarii · 2008
Combined the advantage of fault tree analysis(FTA) with that of expert system(ES),a diagnostic ES for electronic system of general equipment based on FTA was designed and implemented.It is the conception of the diagnostic ES that suited top event is searched by input fault phenomenon,top event fault tree is generated,and minimal cut sets are computed by Fussell algorithm,test flow is created according to the order of importance of minimal cut sets in which the users can be guided to find fault part.The establishment of knowledge base of ES based on relational database(RDB) and computing of importance of minimal cut sets through using the reciprocal of mean time between failure(MTBF),the general structure and reasoning process of the system were illustrated with an emphasis.The application of the system to an example shows that it resolves the problem of knowledge acquisition well and keeps a high efficiency of the expert system with the integrity of the knowledge.