Reliability Approving Procedure of New Type Electric Multiple Unit

초록

To apply the new type EMU to an existing line, verification of the new system has to be performed. Functional test is a generous method, but the test is just one time verification of a system, so continuous verification is required for a system. Reliability, Availability, Maintainability & Safety (RAMS) check is a typical method for a continuous test. Because the RAMS procedure to get a meaningful results has to be applied to the overall lifecycle - design, development, production and commissioning, many countries request RAMS report for a project bidding. Also several international standards are recommended for the application of RAMS procedure in the railway system. EN 50126 of CENELEC, and IEC 62278 provide railway authorities and railway company with a procedure which enable the implementation of a consistent approach to the management of RAMS. IEC 62278 is often referred to in the field of railway system. The purpose of the RAMS application is to prove whether performances and RAMS results of newly developed system are improved to some extent compared to that of the existing system or not. Reliability of the RAMS is the basic metric. Target setting, prediction, and demonstration for reliability should be proceed to apply reliability procedure to a railway system. This paper represents the reliability approving procedure applied to the advanced EMU based on the referenced RAMS standards.