A Fault Diagnosis Method of Rolling Mill Bearing at Low Frequency and Overload Condition Based on Integration of EEMD and GA-DBN

Table 2

Characteristic frequency of bearing fault.

Fault types	The 5.04 r/min group	The 3.96 r/min group
Inner ring fault (Hz)	1.065	0.839
Outer ring fault (Hz)	0.862	0.673
Roller fault (Hz)	0.388	0.306
Cage failure (Hz)	0.037	0.029