themechanical fault on the test rig. So, the FIHE-based CMtechnique
was applied to the signals. The intermediate FIHE results obtained
when u ¼ 50 Hz and the final CMresults are shown in Fig. 12.
From Fig. 12a, it is clearly seen that the mechanical unbalance
fault worsens the frequency shift of the generator line current
signals. Fig. 12b shows that the criterion