A Novel Parameter-Adaptive VMD Method Based on Grey Wolf Optimization with Minimum Average Mutual Information for Incipient Fault Detection

Table 1

Technical parameters.

Test bearing (inner race)		Test bearing (outer race)
Parameters	Values	Parameters	Values
Fault size	0.007″	Fault size	0.007″
Sampling frequency fs	12000 Hz	Sampling frequency fs	12000 Hz
Fault characteristic frequency f	162 Hz	Fault characteristic frequency f	107 Hz
Rotational frequency fr	29.95 Hz	Rotational frequency fr	29.95 Hz