Difference between revisions of "Modal ODS and Modal(EMA-OMA) identification"

The BroBand Modal Identification Modula is bases on the algorithm of Polyreference Least Squares Complex Frequency (p-LSCF), developed in 2003. p-LSCF is a frequency MIMO modal identification algorithm which has superior performance compared to most time domain MIMO techniques, such as Polyreference Least Squares Complex Exponential (PRCE or LSCE), Extended Ibrahim Time Domain (EITD), and Eigensystem Realization Algorithm(ERA). EMA BroBand makes use of measured Frequency Response Function (FRF) as source data. OMA BroBand, which shares the same modal identification algorithm, on the other hand uses measured Half Power Spectrum Density (HPSD) as source data. As a result, a signal processing procedure to estimate the HPSD is required before the modal identification.