Rolling Bearing Fault Diagnosis Based on Domain Adaptation and Preferred Feature Selection under Variable Working Conditions

Table 2

The introduction of experimental data.

Fault condition	Fault size (mm)	Number of training samples	Number of testing samples		Class label
		2 hp	2 hp (case 1)	3 hp (case 2)
Normal	0	20	40	40	1
Ball fault	0.007	20	40	40	2
	0.014	20	40	40	3
	0.021	20	40	40	4
	0.028	20	40	40	5
Inner race fault	0.007	20	40	40	6
	0.014	20	40	40	7
	0.021	20	40	40	8
	0.028	20	40	40	9
Outer race fault	0.007	20	40	40	10
	0.014	20	40	40	11
	0.021	20	40	40	12
Number of samples		240	480	480