The Fault Diagnosis of Rolling Bearing Based on Variational Mode Decomposition and Iterative Random Forest

Table 1

The importance of eigenvalues under the VMD.

Characteristic variables	Mean decrease accuracy	Mean decrease gini
Mean	36.1008	69.7278
Std	25.8246	53.9403
Median	19.7956	11.3099
Trimmed	23.7853	33.9644
Mad	23.4675	47.0163
Min	20.5300	52.2737
Max	21.9004	46.3639
Range	20.2021	50.0970
Skew	20.9814	20.4321
Kurtosis	40.1319	81.4969
Se	27.2219	55.9879
CV	36.4835	69.7447
CSS	24.2071	51.2260
Volatility index	9.7392	7.0719
Energy entropy	50.6705	115.4719
Information entropy	25.2835	48.0819