A consistent-mode indicator for the eigensystem realization algorithmA new method is described for assessing the consistency of structural modal parameters identified with the Eigensystem Realization Algorithm. Identification results show varying consistency in practice due to many sources including high modal density, nonlinearity, and inadequate excitation. Consistency is considered to be a reliable indicator of accuracy. The new method is the culmination of many years of experience in developing a practical implementation of the Eigensystem Realization Algorithm. The effectiveness of the method is illustrated using data from NASA Langley's Controls-Structures-Interaction Evolutionary Model.
Document ID
19920053079
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Pappa, R. S. (NASA Langley Research Center Hampton, VA, United States)
Elliott, K. B. (NASA Langley Research Center Hampton, VA, United States)
Schenk, A. (DLR Goettingen, Federal Republic of Germany, United States)