Identification du modele d'un avion aeroelastique a l'aide d'une technique d'optimisation non-lineaire.

摘要

This project treats an aspect of the aeroservoelastic interactions, which is the aerodynamic forces approximation from the frequency domain into the time domain. These interactions concern only the Fly-By-Wire airplanes, where exists the necessity of aeroservoelastic multidisciplinary studies or the integration of many disciplines.; In order to obtain a good approximation of aerodynamic forces applied on the airplanes, optimization methods such as the Least Squares LS, Matrix Pade MP and Minimum State MS methods were studied and applied.; The MS method developed by Karpel gives better results with respect to the LS and MP methods, which explains our interest for this method. The theoretical development and the programming of these approximation methods are presented in this project.; The implementation of these methods in MATLAB and MATRIXX will permit us to compare and to decide the choice of one of them depending of the desired type of application.