24 K. Napolitano and M. Schmidt-Landin 104 105 106 103 102 0 500 1000 1500 2000 Traditional Fixed Base Test Fixed Base Correction 2500 3000 Frequency (Hz) Mode Indicator Function Fig. 2.15 CMIF of traditional fixed base test (blue) versus fixed base correction (red) 0 500 1000 1500 2000 2500 3000 Frequency (Hz) Mode Indicator Function 103 102 101 Fig. 2.16 CMIF of FRF associated with rigid body base accelerations as references; note that most modes are well excited
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