Structural monitoring by system identification in time domain
Koh, C.G. Liaw, C.Y. Hong, B.
Hong, B.
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Abstract
A system identification (SI) procedure to identify structural parameters is proposed in this paper. Instead of identifying parameters in the physical domain, which involves search in a large-dimensional parameter space, the search is made easier computationally in sub-domains of small-dimensional orders. Modal decomposition technique is employed. The objective function is the minimization of error of modal response history. Physical parameters are then recovered by making use of modal orthogonality properties. The Genetic Algorithm (GA) is employed based on the principle of natural selection whereby better genes survive and propagate and therefore increase the chance of converging to the best parameter set. For numerical study, a 10-story shear building is considered to illustrate the efficiency of the proposed procedure.
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Proceedings of SPIE - The International Society for Optical Engineering
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Date
1999
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Article