Table 7 Evaluation indexes of different feature extraction methods for different fault types.

EI	Method	TN:50	TN:40	TN:30	TN:20	TN:10
Acc	VMD-RCMDE	99.5	100	100	100	100
	VMD-MDE	99	99.38	99.17	100	100
	VMD-MFE	97.5	98.13	98.33	98.75	97.5
	VMD-MPE	82.5	86.88	86.67	91.25	90
Pre	VMD-RCMDE	99.5	100	100	100	100
	VMD-MDE	99.01	99.43	99.26	100	100
	VMD-MFE	97.64	98.03	98.08	98.75	97.5
	VMD-MPE	83.4	89.82	86.37	91.29	89.61
Rec	VMD-RCMDE	99.5	100	100	100	100
	VMD-MDE	98.98	99.42	99.24	100	100
	VMD-MFE	97.51	98.2	98.41	98.68	97.22
	VMD-MPE	82.29	85.6	86.06	90.92	88.89
F1	VMD-RCMDE	99.5	100	100	100	100
	VMD-MDE	98.98	99.42	99.24	100	100
	VMD-MFE	97.48	98.05	98.19	98.68	97.21
	VMD-MPE	82.58	85.59	85.73	90.99	88.75

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