Fault Diagnosis Method for Rotating Machinery Based on Hierarchical Amplitude-Aware Permutation Entropy and Pairwise Feature Proximity

Table 2

Detailed information of different working states of bearings.

Label	Bearing state	Abbreviations	Fault diameter (mm)	The number of training samples	The number of testing samples
1	Normal state	Nor		20	30
2		IRF1	0.1778	20	30
3	Inner race fault	IRF2	0.3556	20	30
4		IRF3	0.5334	20	30
5		BF1	0.1778	20	30
6	Ball fault	BF2	0.3556	20	30
7		BF3	0.5334	20	30
8		ORF1	0.1778	20	30
9	Outer race fault	ORF2	0.3556	20	30
10		ORF3	0.5334	20	30