Optimal Input Location for Modal Identification

A method is discussed to find optimal input locations for experimental modal analysis by maximizing the T-norm of the associated Fisher Information Matrix. Through numerical simulations, it is shown that these input locations may be different for different modes. It is further shown that modal param...

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Bibliographic Details
Published inProcedia engineering Vol. 199; pp. 990 - 995
Main Authors Jana, Debasish, Prajapat, Kanta, Mukhopadhyay, Suparno, Ray Chaudhuri, Samit
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 2017
Subjects
Damage detection
Damage locating vector
Experimental modal analysis
Fisher Information Matrix
Optimal input location
Fisher Information Matrix
Damage detection
Experimental modal analysis
Optimal input location
Damage locating vector
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Summary:A method is discussed to find optimal input locations for experimental modal analysis by maximizing the T-norm of the associated Fisher Information Matrix. Through numerical simulations, it is shown that these input locations may be different for different modes. It is further shown that modal parameters estimated from experiments with non-optimally located inputs may lead to erroneous damage localization. The method is also applied to experiments on a laboratory scale truss model.
ISSN:1877-7058
1877-7058
DOI:10.1016/j.proeng.2017.09.228