✦ LIBER ✦

IDENTIFICATION OF NARMAX MODELS ON A MODAL BASE

✍ Scribed by F. Thouverez; L. Jezequel

Publisher: Elsevier Science
Year: 1996
Tongue: English
Weight: 720 KB
Volume: 189
Category: Article
ISSN: 0022-460X
DOI: 10.1006/jsvi.1996.0015

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✦ Synopsis

Linear approximations of the behaviour of structures are often flawed due to the presence of non-linearities. These can strongly influence the dynamic response; it is essential to detect and identify them. The purpose of this paper is to develop a method to identify the NARMAX on the modal base. By using the modal co-ordinates to express the NARMAX we will be able to reduce the number of parameters to identify and thus to make possible its use in a multi-dimensional mechanical context. Moreover, the modal co-ordinates allow us to minimize the non-linearities localization problem. A numerical test will be carried out to illustrate the properties and advantages of this procedure.

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