Rolling Element Localized Fault Diagnosis Method for Train Bearings Based on Orthogonal Bi-axial Signals

This paper proposes a rolling element fault diagnosis method for train bearings based on orthogonal bi-axial vibration signals, which addresses the complex and difficult-to-diagnose rolling element fault signals due to the lack of reference signals and the high diagnostic difficulty. Firstly, the coupling form of orthogonal bi-axial vibration signals in rolling element fault signals is analyzed. Secondly, a reference setting method based on orthogonal bi-axial signals is proposed. Finally, the effectiveness and advancement of the proposed algorithm are verified by processing localized rolling element faults on a laboratory-scale test rig and collecting signals at different speeds. This method provides a certain reference and theoretical guidance for the diagnosis of rolling element faults in train bearings under complex service environments.