Acoustic Fault Diagnosis of Rotor Bearing System

Table 1

Recognition result of acoustic signals of rotor-bearing system with the 1/3 frequency multiplication method and the K-nearest neighboring classifier.

Type of acoustic signals	EF (%)
	Number of K	1	3	5
Normal		100	100	100
Faulty inner ring		90	100	93.5
Faulty outer ring		100	100	100
Faulty rolling element		90	100	93.5
Rubbing		97	100	98.5