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ON THE USE OF THE GAUSS FILTER IN MODAL PARAMETER ESTIMATION

โœ Scribed by A. AGNENI

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
165 KB
Volume
14
Category
Article
ISSN
0888-3270

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โœฆ Synopsis

The paper deals with the modal parameter estimation from the instantaneous envelope and phase*achievable by the Hilbert transform*of a single mode "ltered from a frequency response function by the Gauss "lter. It is possible, modulating the Gauss function, to put its maximum on the desired frequency, for instance on the peak of the mode of interest. Then a suitable choice of the parameter, which determines the sharpness of the Gauss function, permits to face the problem of modes with di!erent damping, also in the highest frequencies of the band. This last point has been the major drawback of similar estimation methods based on the Gauss}Morlet wavelet. The results presented have been obtained both from numerical simulations and from experimental tests: the "rst ones achieved from synthesised impulse response functions of single and multiple lumped degree of freedom systems, and the second ones carried out on a simple structure (clamped aluminium plate).

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