Research Of Reliability Centered Maintenance And Its Application In Railway Signal Equipment

With the rapid development of railway transportation, the schedule maintenance mode of railway signal equipment is turning into advanced condition based maintenance mode. In reliability centered maintenance, maintenance strategies are made by analyzing the failure mode and considering the relationship among performance, maintenance strategy and economy.In traditional RCM, the accuracy and efficiency of maintenance analysis are reduced for being short of quantificational tools. So in this paper, the quantification of the maintenance decision is realized by studying some key technologies of equipment importance analysis, maintenance manner decision-making and maintenance cycle model.Firstly, the pivotal factors which affect the importance of railway signal equipment are analyzed, and an importance analyzing method based on Monte Carlo simulation is provided to solve the problem that the traditional method influenced by too many subjective factors. For complex equipment, based on failure mode and effect analysis (FMEA) and grey theory, a quantificational failure criticality analysis model is applied. The precision of criticality analysis is improved.Secondly, modified logic decision diagram of maintenance mode based on equipment and failure mode simplifies the classification of maintenance mode and logic decision. Then this paper uses analytical hierarchy process as the quantificational method of the selection of maintenance mode. Then according to classification of maintenance mode and the purpose of maintenance decision, maintenance cycle models are summarized. Solution algorithm for some models is given.At last, a summary is given. The future work which should be done with the idea of the maintenance decision system based on RCM is proposed, and the prospect of applying the technology of maintenance decision in the field of railway signal system is described.