Wavelet Packet Transform-Assisted Least Squares Support Vector Machine for Gear Wear Degree Diagnosis

Table 2

Gear health status description.

Gear category	Depth of wear	Gear category	Crack depth (mm)
Mild wear	The public law line shortens by 0.05	Mild crack	Crack depth 0.35
Moderate wear	Public law line shortening <0.1	Moderate crack	Crack depth 0.68
Heavy wear	Public law line is shortened by 0.1–0.2	Heavy crack	Crack depth 1.23