Table 3 Comparison of different feature extraction methods.

From: A fault diagnosis method for building electrical systems based on the combination of variational modal decomposition and new mutual dimensionless

Kind of experiment

Experimental method

Average testing time (s)

Average test accuracy (\(\%\))

1

Proposed method

18

91.67

2

EMD+MDI+ QGA-SVM

25

82.73

3

LMD+MDI+ QGA-SVM

28

61.12

4

VMD+SVD+ QGA-SVM

22

85

5

EMD+SVD+ QGA-SVM

19

81.8

6

LMD+SVD+ QGA-SVM

21

55.56

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