Parameter-Adaptive VMD Method Based on BAS Optimization Algorithm for Incipient Bearing Fault Diagnosis

Table 1

Information of the experimental bearing 6203.

Geometric parameters
Outer race diameter, do	40 mm
Inner race diameter, di	17 mm
Rolling element diameter, d	6.747 mm
Number of the rolling elements, z	8
Pitch diameter, D	29 mm
Contact angle,	0°
Spindle rotational frequency, fs	30 Hz
Fault characteristic frequencies
Inner raceway, fi	148 Hz
Outer raceway, fo	92 Hz
Rolling element, fb	122 Hz