A Double Feature Extraction Method for Rolling Bearing Fault Diagnosis Based on Slope Entropy and Fuzzy Entropy

Table 2

Recognition rates for ten types of feature combinations.

	IR007 (%)	B007 (%)	OR007 (%)	IR021 (%)	B021 (%)	OR021 (%)	Average (%)
AE&SlE	100	100	80	80	98	100	93
AE&FE	100	44	98	100	72	100	85.7
AE&PE	100	80	100	100	88	100	94.7
AE&SE	100	66	96	92	68	100	87
SlE&FE	100	100	100	96	98	94	98
SlE&PE	46	98	90	100	72	46	75.3
SlE&SE	100	100	44	58	90	78	78.3
FE&PE	92	76	100	100	88	96	92
FE&SE	100	62	98	98	72	94	87.3
PE&SE	100	74	98	98	74	76	86.7