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Shock and Vibration
Volume 11 (2004), Issue 3-4, Pages 365-375

Validation of Two Nonlinear System Identification Techniques Using an Experimental Testbed

V. Lenaerts,1 G. Kerschen,1 J.-C. Golinval,1 M. Ruzzene,2 and E. Giorcelli3

1Vibrations et Identification des Structures, University of Liège, Chemin des Chevreuils 1 (B52), B-4000 Liège, Belgium
2School of Aerospace Engineering, Georgia Institute of Technology, 270 Ferst Dr., Atlanta, GA 30332-0150, USA
3Dipartimento di Meccanica, Politecnico di Torino, Duca Abruzzi 24, 10129, Torino, Italy

Received 24 August 2004; Revised 24 August 2004

Copyright © 2004 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The identification of a nonlinear system is performed using experimental data and two different techniques, i.e. a method based on the Wavelet transform and the Restoring Force Surface method. Both techniques exploit the system free response and result in the estimation of linear and nonlinear physical parameters.