Improvement of Adaptive GAs and Back Propagation ANNs Performance in Condition Diagnosis of Multiple Bearing System Using Grey Relational Analysis

Table 5

The GRG and sequence of features extracted.

Number	GRG = 0.3	GRG = 0.5	GRG = 0.6	GRG = 1	Features
1	0.912	0.945	0.954	0.972	Root mean sq. value
2	0.912	0.945	0.953	0.971	Standard deviation
3	0.909	0.943	0.952	0.970	Abs. mean value
4	0.868	0.916	0.929	0.956	Skewness
5	0.864	0.910	0.923	0.951	Max peak value
6	0.761	0.833	0.855	0.907	Shape factor
7	0.746	0.830	0.854	0.904	Kurtosis
8	0.480	0.604	0.646	0.752	Crest factor
9	0.412	0.536	0.580	0.695	Impulse factor
10	0.367	0.488	0.532	0.652	Clearance factor