The Extraction Method of Gearbox Compound Fault Features Based on EEMD and Cloud Model

Table 1

Single cloud model characteristics.

Single cloud model	Type 1 (Ex, En, He)	Type 2 (Ex, En, He)	Type 3 (Ex, En, He)	Type 4 (Ex, En, He)	Type 5 (Ex, En, He)
IMF1	−0.0079	0.0031	−0.0029	0.0099	−0.0088
	0.9095	0.9678	0.7992	0.8819	1.8971
	0.0707	0.0053	0.0036	0.0031	—
IMF2	−0.0016	0.000145	−0.00063	−0.0013	0.0017
	0.4378	0.4501	0.3933	0.4161	0.8557
	0.1680	0.1294	0.0812	0.1069	0.2029
IMF3	0.0017	0.00037	−0.0040	−0.0007732	0.0005829
	0.2791	0.3269	0.4423	0.2785	0.2540
	0.0575	0.0397	0.1109	0.0523	0.0359
IMF4	−0.0014	−0.0016	0.0002721	0.0001742	0.0014
	0.1458	0.2288	0.1364	0.1758	0.2702
	0.0297	0.0270	0.0177	0.0157	0.0426