A Method for Determining Intrinsic Mode Function Number in Variational Mode Decomposition and Its Application to Bearing Vibration Signal Processing

Table 11

NMI of bearing vibration signal.

K	Normal_3						K	IR028_3
1	1.00						1	1.00
2	1.00	0.95					2	0.56	1.00
3	1.00	0.89	0.59				3	0.37	1.00	0.48
4	1.00	0.89	0.63	0.64			4	0.22	1.00	0.42	0.81
5	0.70	1.00	0.90	0.66	0.39		5	0.15	1.00	0.48	0.36	0.97
6	0.57	1.00	0.42	0.73	0.19	0.66	6	0.11	0.34	1.00	0.42	0.30	0.97
K	OR021@6_3						K	B028_3
1	1.00						1	1.00
2	0.29	1.00					2	0.08	1.00
3	0.29	0.32	1.00				3	0.09	1.00	0.43
4	0.25	0.34	0.47	1.00			4	0.12	0.48	0.34	1.00
5	0.26	0.33	0.47	0.33	1.00		5	0.14	0.43	0.47	1.00	0.39
6	0.29	0.24	0.33	1.00	0.47	0.20	6	0.14	1.00	0.46	0.37	0.43	0.11