Automated Bearing Fault Diagnosis Using 2D Analysis of Vibration Acceleration Signals under Variable Speed Conditions

Table 4

Diagnostic performance of the proposed scheme under different scenarios.

Training dataset; (, number of training samples)	Testing datasets; (number of test samples)	Classification accuracy (%)				Average classification accuracy (%); (sensitivity, specificity)
		Normal	Inner race fault (IRF)	Ball fault (BF)	Outer race fault (ORF)
Dataset 1; (6, 144)	Datasets 2, 3, 4; (432)	90.28	86.81	86.81	97.92	90.45; (0.90, 1.00)
Dataset 2; (6, 144)	Datasets 1, 3, 4; (432)	88.19	88.19	96.53	94.44	91.84; (0.88, 1.00)
Dataset 3; (6, 144)	Datasets 1, 2, 4; (432)	99.31	89.52	98.61	95.83	95.83; (0.99, 1.00)
Dataset 4; (6, 144)	Datasets 1, 2, 3; (432)	93.75	85.42	100.0	97.22	94.10; (0.94, 1.00)
Dataset 1; (9, 96)	Datasets 2, 3, 4; (288)	100.0	91.67	100.0	97.92	97.40; (0.93, 1.00)
Dataset 2; (9, 96)	Datasets 1, 3, 4; (288)	93.75	94.79	100.0	98.96	96.88; (0.94, 1.00)
Dataset 3; (9, 96)	Datasets 1, 2, 4; (288)	100.0	91.67	100.0	97.92	97.40; (1.00, 1.00)
Dataset 4; (9, 96)	Datasets 1, 2, 3; (288)	98.96	94.79	98.96	98.96	97.92; (0.99, 1.00)
Dataset 1; (12, 72)	Datasets 2, 3, 4; (216)	94.44	95.83	98.61	97.22	96.53; (0.94, 1.00)
Dataset 2; (12, 72)	Datasets 1, 3, 4; (216)	100.0	98.61	98.61	95.83	98.26; (1.00, 1.00)
Dataset 3; (12, 72)	Datasets 1, 2, 4; (216)	100.0	100.0	100.0	98.61	99.65; (1.00, 1.00)
Dataset 4; (12, 72)	Datasets 1, 2, 3; (216)	100.0	97.22	100.0	100.0	99.31; (1.00, 1.00)
Dataset 1; (15, 57)	Datasets 2, 3, 4; (171)	91.23	98.25	98.25	100.0	96.93; (0.91, 1.00)
Dataset 2; (15, 57)	Datasets 1, 3, 4; (171)	98.25	100.0	100.0	100.0	99.56; (0.98, 1.00)
Dataset 3; (15, 57)	Datasets 1, 2, 4; (171)	100.0	98.25	100.0	96.49	98.68; (1.00, 1.00)
Dataset 4; (15, 57)	Datasets 1, 2, 3; (171)	100.0	98.25	100.0	100.0	99.56; (1.00, 1.00)
Dataset 1; (18, 48)	Datasets 2, 3, 4; (144)	97.92	100.0	100.0	100.0	99.48; (1.00, 1.00)
Dataset 2; (18, 48)	Datasets 1, 3, 4; (144)	100.0	100.0	100.0	100.0	100.0; (1.00, 1.00)
Dataset 3; (18, 48)	Datasets 1, 2, 4; (144)	100.0	100.0	100.0	100.0	100.0; (1.00, 1.00)
Dataset 4; (18, 48)	Datasets 1, 2, 3; (144)	100.0	97.92	100.0	100.0	99.48; (1.00, 1.00)