Research On Siemens LZB700M Continuous Unit Train Control System On-board Unit Malfunction Diagnosis And Treatment Methods

SIEMENS LZB700M continuous train control system is widely recognized and applied in the international technology mature system.The vehicle unit of this system is the focus of this thesis,the specific object is SIEMENS signal equipment vehicle unit of the Nanjing Metro Line 1.The vehicle unit of Nanjing metro line 1 involved in the complex structure of the device,a large number of external connections,eoupled with weather,environment,human and other uncertain factors,the cause of failure is not easy to determine.And in recent years,urban rail transit on the train running safety and stability requirements are increasing,the traditional rely on download equipment fault data for fault diagnosis and processing methods,has been unable to meet the demand.Based on the collection of a large number of domestic and foreign related fault diagnosis method,and the actual situation since the operation of Nanjing metro line 1 opened on the first,the thesis describes the internal structure and principle of the SIEMENS LZB700M continuous train control system in vehicle unit.Then,the fault tree diagnosis method is used to analyze the 4 kinds of faults of the vehicle unit in detail,and the fault proeessing flow chart is obtained.Furthermore,according to the expert system fault diagnosis method,combined with the fault processing flow chart obtained according to the fault tree analysis method,the typical case knowledge of vehicle unit fault is analyzed.Next,based on the typical fault case knowledge,troubleshooting measures reminder,tool information and the basic information of each device board,the knowledge database of vehicle unit data is established.In the process of realizing inference engine,according to the characteristics of expert fault diagnosis method,the method of combining basic diagnosis unit reasoning with production frame reasoning is adopted.Finally,the artificial intelligence simulation system is used to simulate the expert fault diagnosis system of vehicle unit.The establishment of vehicle unit expert system fault diagnosis system can improve the efficiency of vehicle unit fault diagnosis to a great extent and ensure the safety and stability of train operation.