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

Table 2

Synthetic cloud model characteristics.

Synthetic 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 + IMF2	−0.0083	0.0029	0.0031	−0.00017	−0.0028
	0.9308	0.2452	0.9891	0.2909	0.8187
	0.0869	0.0485	0.0060	0.0347	0.0042
IMF3 + IMF4	−0.0028	0.0096	−0.000415	−0.0085	−0.00098
	0.3890	0.9018	0.1957	1.9362	0.4094
	0.1087	0.0046	0.0366	—	0.0678