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

Table 6

Classification recognition rates of envelope entropy.

IMF	Classification and recognition accuracy (%)
	Normal	Inner ring fault	Outer ring fault	Rolling element fault	Mean
IMF1∼2	40	62	100	50	63.0
IMF1∼3	40	50	100	40	57.5
IMF1∼4	38	54	100	46	59.5
IMF1∼5	56	80	100	66	75.5
IMF1∼6	84	98	100	96	94.5
IMF1∼7	86	100	100	98	96.0
IMF1∼8	92	98	100	96	96.5
IMF1∼9	96	100	100	98	98.5