Optimal Statistical Feature Subset Selection for Bearing Fault Detection and Severity Estimation

Table 2

Pearson’s correlation coefficient between a raw vibration signal and each of its IMFs

	IMF1	IMF2	IMF3	IMF4	IMF5	IMF6	IMF7	IMF8	IMF9	IMF10	IMF11	IMF12
	0.7732	0.6790	0.5711	0.6099	0.6174	0.6927	0.7220	0.6656	0.6563	0.6770	0.5092	0.2464
	0.8925	0.6375	0.5286	0.5046	0.6102	0.6432	0.5587	0.5329	0.5329	0.3920	0.2470	0.1647

Note: and belong to IR 007 and BB 021, respectively.