Rolling Bearing Fault Diagnosis Based on MFDFA-SPS and ELM

Figure 6

The waveforms of seven vibration acceleration signals in each state. (a) Normal. (b) 7 mils, slight inner-race fault. (c) 28 mils, serious inner-race fault. (d) 7 mils, slight outer-race fault. (e) 28 mils, serious outer-race fault. (f) 7 mils, slight ball fault. (g) 28 mils fault, serious ball fault.

(a)

(b)

(c)

(d)

(e)

(f)

(g)