Research On Expert System Implementation Of Railway Signal Equipment Fault Diagnosis Based On Fault Tree Analysis

The achievement of condition monitoring and fault diagnosis of the railway station signal system equipment by the use of new technology and methods is the major issues which can protect the safety of rail transport in China.Because of the complexity of the equipment itself,as well as by environmental factors,the actual causes of equipment fault have the nature of complexity,randomness and fuzziness,the traditional fault diagnosis has been unable to meet current demands.Therefore,the ministry of Railways put forward the Major projects "The intelligent analysis and fault diagnosis system of railway station signals equipment",in order to improve the expert system of microcomputer monitoring fault diagnosis.This paper study on the expert system implementation of railway signal equipment fault diagnosis based on fault tree analysis Combination of the instructor-sponsored research projects of the Ministry of Railways.Based on the analysis of domestic and foreign research,the article starts by describing the Concept and the principle of the diagnosis expert system and the fault diagnosis technology,explained in detail the integration advantages of the expert system and the fault diagnosis technology,and put forward the fault diagnosis method based on fault tree technology.Then,the article focus on the key technology of the establishment of the fault tree,the fault tree analysis of the quantitative and qualitative analysis and the fault diagnosis method based on the fault tree quantitative analysis.For the knowledge acquisition,knowledge representation and reasoning mechanism of the expert system,the paper put forward the Key techniques method such as the integration of knowledge acquisition and fault tree establishment, the integration of fault tree minimal cut sets and knowledge framework representation, the ideological use of the expert system inference mechanism based on minimal cut sets fault tree importance.Finally,the paper describe the overall structure and function modules of the expert system of railway signal equipment fault diagnosis based on fault tree analysis.The results proved that the application of the fault tree theory which is practically valuable can effectively improve the efficiency of expert systems.