Differential Equations and Nonlinear Mechanics
Volume 2009 (2009), Article ID 842656, 26 pages
doi:10.1155/2009/842656
Research Article

Oscillation Susceptibility Analysis of the ADMIRE Aircraft along the Path of Longitudinal Flight Equilibriums in Two Different Mathematical Models

Stefan Balint,1 Agneta Maria Balint,2 and Achim Ionita3

1Faculty of Mathematics and Computer Science, West University of Timisoara, Bulv. V.Parvan 4, 300223 Timisoara, Romania
2Faculty of Physics, West University of Timisoara, Bulv. V.Parvan 4, 300223 Timisoara, Romania
3Institute for Theoretical and Experimental Analysis of Aeronautical Structures, STRAERO, Bd.Iuliu Maniu 220, 061126, Bucharest, Romania

Received 8 March 2009; Revised 3 May 2009; Accepted 28 June 2009

Academic Editor: Nicola Bellomo

Copyright © 2009 Stefan Balint et al. 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.

Abstract

The oscillation susceptibility of the ADMIRE aircraft along the path of longitudinal flight equilibriums is analyzed numerically in the general and in a simplified flight model. More precisely, the longitudinal flight equilibriums, the stability of these equilibriums, and the existence of bifurcations along the path of these equilibriums are researched in both models. Maneuvers and appropriate piloting tasks for the touch-down moment are simulated in both models. The computed results obtained in the models are compared in order to see if the movement concerning the landing phase computed in the simplified model is similar to that computed in the general model. The similarity we find is not a proof of the structural stability of the simplified system, what as far we know never been made, but can increase the confidence that the simplified system correctly describes the real phenomenon.