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78 Chapter 3. Identification from multi-patch non-stationary operational datathe PoGER method. The latter can be expla<strong>in</strong>ed by the pre-scal<strong>in</strong>g <strong>of</strong> the dataused with the PreGER approach. Due to this operation, a better signal to noiseratio can be obta<strong>in</strong>ed if an average is used <strong>of</strong> the reference signals from all patches.Apart from the experiments conducted <strong>in</strong> this Chapter, the PoGER and PreGERapproach were also applied to the Z24 bridge <strong>system</strong> <strong>identification</strong> benchmarkdescribed <strong>in</strong> Chapter 5.

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