Intelligent Fault Diagnosis of Bearing Based on Convolutional Neural Network and Bidirectional Long Short-Term Memory

Table 1

CWRU experimental sample.

State	Defect size (inch)	Data length	No. of samples	Load zone	Class (label)
Healthy state	—	1024	118	—	0
Ball fault	0.007	1024	118	—	1
	0.014	1024	118	—	1
	0.021	1024	118	—	1
Inner race fault	0.007	1024	118	—	2
	0.014	1024	118	—	2
	0.021	1024	118	—	2
Outer race fault	0.007	1024	118	6 : 00	3
	0.014	1024	118	6 : 00	3
	0.021	1024	118	6 : 00	3