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

Figure 11

The characteristic classification results of the envelope entropy of each IMF. (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)