Multilayer Extreme Learning Convolutional Feature Neural Network Model for the Weak Feature Classification and Status Identification of Planetary Bearing

Figure 8

Signal waveforms listed in Table 1: (a) no-damage bearing signal in the time domain; (b) the spectrum of no-damage bearing signal; (c) inner-race fault bearing signal in the time domain; (d) the spectrum of inner-race fault bearing signal; (e) outer-race fault bearing signal in the time domain; (f) the spectrum of outer-race fault bearing signal; (g) ball fault bearing signal in the time domain; (h) the spectrum of ball fault bearing signal.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)