A Novel Hierarchical Algorithm for Bearing Fault Diagnosis Based on Stacked LSTM

Table 1

Experiment samples.

Condition	Label	Sample length	Sample number
Normal	0	256	300
IF—7 inch	1	256	300
BF—7 inch	2	256	300
OF@6—7 inch	3	256	300
OF@3—7 inch	4	256	300
OF@12—7 inch	5	256	300
IF—14 inch	6	256	300
BF—14 inch	7	256	300
OF@6—14 inch	8	256	300
IF—21 inch	9	256	300
OF@6—21 inch	10	256	300
OF@3—21 inch	11	256	300
OF@12—21 inch	12	256	300

Note. IF, OF, and BF mean inner, outer, and ball faults, respectively. 7 inch means the diameter of faults, and so on. @6 means the location of faults in outer fault, and so on.