A Novel Clustering Method Combining ART with Yu’s Norm for Fault Diagnosis of Bearings

Table 2

Statistics of each fault condition of bearing.

Condition	Normal	Inner race fault	Outer race fault	Different severity level of ball fault
Defect diameter (inch)	0	0.014	0.014	0.007	0.014	0.021	0.028
Label	1	2	3	4	5	6	7
Number of data samples	25	25	25	25	25	25	25