Study On The Maintenance Strategy For Railway Lines Based On Condition Monitoring

Railway line equipment maintenance has a major impact on ensuring the qualitybalance and extending the service life of equipment, it is one of the key factors todetermine the equipment operator safety, reduce equipment maintenance costs andincrease economic efficiency. In a variety of line level coexist environment,It has veryimportant significance for modern railway equipment management to explore the law ofmaintenance of equipment, scientifically determine equipment maintenance andrepairing strategies, and build an effective equipment monitoring and maintenancemode.This paper presents the state-based detection of railway track maintenance strategy,focusing on the Statistical Process Control（SPC）control charts in the application ofstate monitoring analysis and maintenance device, include the following aspects:(1)The monitoring and evaluation of the railway line status. Analyzing theevaluation modes and indicators of the existing railway line state, it points out thelimitations of the lack of static test data and peak evaluation indicators for guiding themaintenance, determines the dynamic test data for track inspection car Track QualityIndex（TQI）to be the key index of the line equipment maintenance guidance, anddefinite the main target of this study, thus ensures the reliability of data.(2)Analyzing the statistical laws of railway line state changes. Through using thehistorical data TQI,analyzing the time trend of the different lines of test datacomprehensively, it sets up the relationship between the line Track Quality Index TQIand the deterioration of the railway line state, then finding a good correlation betweenthe actual state of the line equipment and TQI, and prioves it is feasible for equipmentstate prediction it use TQI.(3)Extracting track quality status characteristic index TQI1, TQI2, establishing SPCcontrol charts of the state of railway line. Through the data analysis of different lines,the consolidated TQI including left align,right surface, level and gauge is available forthe track quality state. On this basis, in light of different equipment maintenance modes to establish SPC charts of railway line status, it can establish the control charts of TQI2and TQIgjwhich are available for mechanical and manual maintenance modes.(4)The application of the railway line predictability of repair-dimensional strategy.Using SPC charts to predict status change of different speed grades of theline,diagnosing the abnormal reasons and lots, determining the mode and time ofmaintenance; It also analyses and forecasts the different control charts which areestablished on different abnormal items and lots, refers to an instance of reflection thatis on the control charts of line device status before and after the maintenance, thenparatively analyze them can verify the effectiveness of maintenance results and thecontrol charts(5)Combining with the actual development of the current track inspection car dataacquisition and testing equipment, it analyses and outlooks the feasibility of controlcharts which are set up on test data of track inspection car directly, comprehensiveutilization of static and dynamic data, improving the forecastion and monitoring of themaintenance projects and so on, and further provides a studying aspect for theimprovement and development of maintenance device which is detected on its state.