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

Table 1

Description of the operation conditions in experiment 1.

Fault types	Fault depth	Sizes of training samples	Sizes of testing samples	Label
Inner race fault 1 (IR1-1)	0.3	180	20	1
Inner race fault 2 (IR1-2)	0.4	180	20	2
Outer race fault 1 (OR1-1)	0.2	180	20	3
Outer race fault 2 (OR1-2)	0.3	180	20	4
Rolling ball fault 1 (RB1-1)	0.2	180	20	5
Rolling ball fault 2 (RB1-2)	0.4	180	20	6
Normal (NO1-1)	0	180	20	7