Automatic Condition Monitoring of Industrial Rolling-Element Bearings Using Motor’s Vibration and Current Analysis

Table 1

Statistical evaluation of vibration measurements.

Scenario	Mean	Variance	MD (%)	VD (%)
50 Hz, Nom	0.3473	0.0846
50 Hz, Inner	0.3478	3.1295	0.14
50 Hz, Outer	0.3482	873.7352	0.26
50 Hz, Lub.	0.3775	0.2715	0.87
40 Hz, Nom	0.3474	0.0597
40 Hz, Inner	0.3484	2.0753	0.29
40 Hz, Outer	0.3483	303.3030	0.26
20 Hz, Nom	0.3487	0.0116
20 Hz, Inner	0.3483	0.3039	−0.11
20 Hz, Outer	0.3488	13.3662	0.01