Intelligent Roller Bearing Fault Diagnosis in Industrial Internet of Things

Table 5

Centre frequency under different k in VMD.

K	Central frequency (KHz)
	BL-IMF1	BL-IMF2	BL-IMF3	BL-IMF4	BL-IMF5	BL-IMF6
2	0.0922	0.2631	—	—	—	—
3	0.0895	0.2246	0.2873	—	—	—
4	0.0494	0.1140	0.2268	0.2878	—	—
5	0.0490	0.1137	0.2239	0.2787	0.3071	—
6	0.0489	0.1136	0.2228	0.2730	0.2890	0.3144