Multilayer Extreme Learning Convolutional Feature Neural Network Model for the Weak Feature Classification and Status Identification of Planetary Bearing

Table 1

Description of status data sample set.

Planetary bearing damage statuses	No damage	Inner-race fault	Outer-race fault	Ball fault
Number of training samples	400	400	400	400
Number of test samples	70	70	70	70
Label	1	2	3	4