Intelligent Diagnosis Method for Centrifugal Pump System Using Vibration Signal and Support Vector Machine

Table 4

DI values of new SSPs in the same abnormal degree from the estimated signals.

Two states	In mild step	In medium step	In severe step
Normal state and abnormal state	1.28	1.57	1.72
Cavitation and impeller unbalance	1.09	1.26	1.54
Cavitation and shaft misalignment	0.98	1.29	1.47
Impeller unbalance and shaft misalignment	1.17	1.38	1.56