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Single-Mode Projection Filters for Modal Parameter Identification for Flexible StructuresSingle-mode projection filters are developed for eigensystem parameter identification from both analytical results and test data. Explicit formulations of these projection filters are derived using the orthogonal matrices of the controllability and observability matrices in the general sense. A global minimum optimization algorithm is applied to update the filter parameters by using the interval analysis method. The updated modal parameters represent the characteristics of the test data. For illustration of this new approach, a numerical simulation for the MAST beam structure is shown by using a one-dimensional global optimization algorithm to identify modal frequencies and damping. Another numerical simulation of a ten-mode structure is also presented by using a two-dimensional global optimization algorithm to illustrate the feasibility of the new method. The projection filters are practical for parallel processing implementation.
Document ID
19880015860
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Huang, Jen-Kuang (Old Dominion Univ. Norfolk, VA, United States)
Chen, Chung-Wen (Old Dominion Univ. Norfolk, VA, United States)
Date Acquired
September 5, 2013
Publication Date
February 1, 1988
Subject Category
Numerical Analysis
Report/Patent Number
NASA-CR-182680
NAS 1.26:182680
Accession Number
88N25244
Funding Number(s)
CONTRACT_GRANT: NAG1-655
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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