✦ LIBER ✦

NON-LINEAR MECHANICAL SYSTEMS IDENTIFICATION USING LINEAR SYSTEMS WITH RANDOM PARAMETERS

✍ Scribed by S. BELLIZZI; M. DEFILIPPI

Publisher: Elsevier Science
Year: 2003
Tongue: English
Weight: 233 KB
Volume: 17
Category: Article
ISSN: 0888-3270
DOI: 10.1006/mssp.2002.1561

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✦ Synopsis

A method to identify the parameters involved in the non-linear terms of randomly excited mechanical systems is presented. It is based on the minimisation of an index function which reflects the difference between an analytical approximation of the powerspectral density function response and the measured one. Using the concept of non-linear modes, an equivalent linear system with random parameters is used to approximate the power-spectral density. The method is applied to the ECL benchmark.

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