Nonlinearity Characterization for Nonlinear Dynamic System Identification Using an Expert Approach

Dimitriadis, Grigorios; Vio, Gareth Arthur

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Nonlinearity Characterization for Nonlinear Dynamic System Identification Using an Expert Approach

Dimitriadis, Grigorios; Vio, Gareth Arthur

2006 • In Proceedings of the 2006 International Conference on Noise and Vibration Engineering

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Keywords :

non-linear system identification; nonlinearity detection; cubic stiffness; piece-wise linear functions; friction; hysteresis; quadratic damping

Abstract :

[en] The identification of nonlinear dynamic systems can be rendered significantly more parsimonious if the nonlinearity present in the system is known. While there are many successful non-parametric nonlinear system identification methods, the resulting models do not describe the nonlinearity in physical terms and are difficult to obtain due to the large number of candidate terms that must be examined. In this paper an expert approach towards the characterization of nonlinearities in a dynamic system is presented. The methodology is based on simulations of dynamic systems with a variety of commonly occurring nonlinear functions. The responses of such systems to various types of excitation are analysed and rules are developed as to what nonlinearity is likely to be present in a system given the dynamic characteristics of measured responses.

Disciplines :

Mechanical engineering
Aerospace & aeronautics engineering

Author, co-author :

Dimitriadis, Grigorios ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Interactions Fluide-Structure - Aérodynamique expérimentale

Vio, Gareth Arthur; University of Manchester > School of Mechanical Aerospace and Civil Engineering

Language :

English

Title :

Nonlinearity Characterization for Nonlinear Dynamic System Identification Using an Expert Approach

Publication date :

September 2006

Event name :

2006 International Conference on Noise and Vibration Engineering

Event organizer :

Katholieke Universiteit Leuven

Event place :

Leuven, Belgium

Event date :

du 18 septembre au 20 septembre 2006

Audience :

International

Main work title :

Proceedings of the 2006 International Conference on Noise and Vibration Engineering

Publisher :

KTH, Heverlee, Belgium

ISBN/EAN :

90-73802-83-0

Pages :

2705-2721

Available on ORBi :

since 30 September 2009

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