A Fault Diagnosis Method for Rolling Bearings Based on Feature Fusion of Multifractal Detrended Fluctuation Analysis and Alpha Stable Distribution

Figure 5

The waveforms of seven vibration signals (ordinate unit: m/s²).

(a) Normal

(b) Slight inner-race faults

(c) Serious inner-race faults

(d) Slight outer-race faults

(e) Serious outer-race faults

(f) Slight ball faults

(g) Serious ball faults