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

Table 2

CC under different component amplitudes.

Signal code	K	Correlation coefficient				Threshold range
S1	3	0.9599	0.2460	0.0837		(0.0627, 0.0823)
	4	0.9599	0.2460	0.0823	0.0627
S2	3	0.9044	0.3786	0.1664		(0.0592, 0.1660)
	4	0.9044	0.3786	0.1660	0.0592
S3	3	0.8224	0.4825	0.2856		(0.0571, 0.2849)
	4	0.8224	0.4824	0.2849	0.0571
S4	3	0.9360	0.3158	0.1127		(0.0649, 0.1110)
	4	0.9360	0.3158	0.1110	0.0649