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Fig. 9 Contribution plots. a Outer raceway fault located at 3 of
'
clock of drive end bearing. b Outer
raceway fault located at 6 of
'
clock of drive end bearing. c Outer raceway fault located at 12 of
'
clock
of drive end bearing
This points out that the contribution plots can be used to identify the sensors affected
by the faults. Particularly, the fault isolation is performed by computing for each
scale the average value: the sensor affected by the fault is that one with the highest
average value. As shown in Figs.
8
and
9
the sensor most affected by the faults is the
accelerometer placed at the drive end. The fault diagnosis is performed using the
contribution plots because they are the signatures of the electric motor conditions
and are features for each fault as shown in Figs.
8
and
9
. Outer raceway fault located
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