A Novel Cuckoo Search Optimized Deep Auto-Encoder Network-Based Fault Diagnosis Method for Rolling Bearing

Table 2

Description of the operation conditions in experiment 2.

Fault types	Fault depth (mm)	Load (kN)	Sizes of training sample	Sizes of testing samples	Label
Inner race fault 1 (IR2-1)	0.4	5	180	20	1
Inner race fault 2 (IR2-2)	0.4	7	180	20	2
Outer race fault 1 (OR2-1)	0.3	5	180	20	3
Outer race fault 2 (OR2-2)	0.3	7	180	20	4
Rolling ball fault 1 (RB2-1)	0.2	5	180	20	5
Rolling ball fault2 (RB2-2)	0.2	7	180	20	6
Normal 1 (NO2-1)	0	5	180	20	7
Normal 2 (NO2-2)	0	7	180	20	8