Intelligent Fault Severity Detection of Rotating Machines Based on VMD-WVD and Parameter-Optimized DBN

Table 8

Sample description under five bearing conditions.

Bearing status	Description	Training data	Testing data	Label
Normal	No crack	100	50	1
Ball fault	Crack occurs in the ball	100	50	2
Combination fault	Crack occurs in the both inner and outer ring	100	50	3
Inner fault	Crack occurs in the inner ring	100	50	4
Outer fault	Crack occurs in the outer ring	100	50	5