In order to realize the fault identification of the traction motor bearing of the subway vehicle,in order to solve the problem that the fault impact of the motor bearing is submerged by the multi-source noise and it is difficult to extract the feature,the filter order and fault period are determined adaptively,and the fault characteristic signal with high signal-to-noise ratio is ob-tained.Finally,the envelope spectrum analysis of the fault characteristic signal is carried out to realize the fault identification.The data collected in the field verified the effectiveness of the method.
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