Enhanced Bearing Fault Detection Using Step-Varying Vibrational Resonance Based on Duffing Oscillator Nonlinear System

Table 2

Acquisition information of the rolling bearing from the bearing data center of CWRU.

Fault types	Size of fault (; inch)	Approximate rotational speed (r/min)	Theoretical fault characteristic frequency (Hz)
Inner race		1797	162.2
Outer race		1730	103.4
Rolling element		1772	139.2