Combined Failure Diagnosis of Slewing Bearings Based on MCKD-CEEMD-ApEn

Table 2

Ratio of parameter: correlation coefficient.

Methods	IMFn							Stages
	1	2	3	4	5	6	7
	Ratio (%)
MCKD-CEEMD	46.0	66.2	83.1	89.6	94.5	96.9	98.4	(A)
	31.2	52.2	67.9	80.2	85.7	87.8	93.3	(B)
	46.2	66.8	80.2	87.4	91.6	95.8	98.7	(C)
MCKD-EEMD	44.2	64.0	80.5	87.2	92.5	95.4	97.2	(A)
	28.8	47.4	62.6	74.7	81.1	84.2	89.8	(B)
	44.0	64.0	77.7	85.1	90.2	95.0	98.2	(C)
CEEMD	19.4	31.3	40.6	50.9	62.5	73.7	85.2	(A)
	7.82	14.0	23.6	41.5	59.1	78.4	87.9	(B)
	13.5	23.8	34.4	48.8	64.2	78.1	88.7	(C)