Multispectral Balanced Automatic Fault Diagnosis for Rolling Bearings under Variable Speed Conditions

Figure 10

Power spectrum: (a) original signals before GFT and IGFT; (b) signals after GFT and IGFT; (c) envelop signals before GFT and IGFT; (d) envelop signals after GFT and IGFT.

(a)

(b)

(c)

(d)