Machine Learning-Based Fault Diagnosis of Self-Aligning Bearings for Rotating Machinery Using Infrared Thermography

Table 7

Confusion matrix of three bearing states at different rpm using KNN.

Decision	Predicted class
	500 rpm			750 rpm			1000 rpm
	HB	IRF	ORF	HB	IRF	ORF	HB	IRF	ORF
True class
No load
HB	6	0	0	6	0	0	6	0	0
IRF	0	5	1	0	5	1	0	6	0
ORF	0	0	6	0	0	6	0	1	5
2 kg load
HB	5	1	0	6	0	0	4	1	1
IRF	1	5	0	0	4	2	0	6	0
ORF	0	0	6	0	1	5	0	2	4
4 kg load
HB	6	0	0	6	0	0	6	0	0
IRF	0	4	2	0	4	2	0	4	2
ORF	0	1	5	0	2	4	0	2	4