Alpha-Stable Distribution and Multifractal Detrended Fluctuation Analysis-Based Fault Diagnosis Method Application for Axle Box Bearings

Table 2

The detail descriptions of seven vibration acceleration signals.

Label	Running state	Fault width (mm)	Speed (r/min)	Sampling frequency (kHZ)	Load (kN)
S1	Normal	0	45	25.6	80
S2	Slight inner-race faults	5	45	25.6	80
S3	Serious inner-race faults	10	45	25.6	80
S4	Slight outer-race faults	5	45	25.6	80
S5	Serious outer-race faults	10	45	25.6	80
S6	Slight ball faults	5	45	25.6	80
S7	Serious ball faults	10	45	25.6	80