A Novel Fault Diagnosis Model for Bearing of Railway Vehicles Using Vibration Signals Based on Symmetric Alpha-Stable Distribution Feature Extraction

Table 2

Specifications of the bearing defects.

Fault ID	Defect type	Defect size (mm)	Rotating speed (rpm)	Defect frequency (Hz)
F1	Normal	—	230	—
F2	Outer race (OR)	0.23	230	22.31
F3	Outer race (OR)	0.43	230	22.31
F4	Inner race (IR)	0.23	230	31.35
F5	Inner race (IR)	0.43	230	31.35
F6	Rolling element	0.23	230	11.04
F7	Rolling element	0.43	230	11.04