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

Table 5

Detailed information of different working states of gearbox.

Label	Gear state	Abbreviations	The number of training samples	The number of testing samples
1	Normal state	Normal	20	30
2	Pinion wear	Wear	20	30
3	Gear wheel pitting	Pitting	20	30
4	Gear wheel broken teeth	Broken teeth	20	30
5	Gear wheel pitting + pinion wear	Pitting + Wear	20	30