Bearing Fault Feature Extraction Method Based on GA-VMD and Center Frequency

Figure 8

The characteristic distribution of center frequency of IMF of four kinds of bearing signals. (a) IMF1. (b) IMF2. (c) IMF3. (d) IMF4. (e) IMF5. (f) IMF6 (g). IMF7 (h). IMF8. (i) IMF9.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)

(i)