With the requirements of safety and reliability in brake system increasingly enhanced in urban transit train. For brake system the performance of prediction system and fault diagnosis must be increased at the same time. MATLAB is a high performance mathematics software integrated data analysis, numeric processing and graphic display, combined with the high-powered software in VB graphical user interface, the convenience of developing fault diagnosis system not only has shorter time but also has good performance characteristics. This paper focus on the software design of brake system fault diagnosis in urban rail transit train, attempt to do some theoretical research for timely and effectively avoid for brake system in operation of the train traffic accident caused by failure.
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