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

Table 2

The root mean square error of the measured signal by the two optimization algorithms.

Bearing signal	GA-VMD		PSO-VMD
		RMSE		RMSE
Normal	[4, 12040]	0.2204	[4, 13500]	0.2303
Inner ring fault	[4, 15480]	0.1317	[4,18840]	0.1332
Outer ring fault	[4, 9880]	0.0694	[4,1274]	0.0821
Rolling element fault	[4, 15560]	0.1081	[4,1760]	0.1257