Title :
LFT modelling of the 2-DOF longitudinal nonlinear aircraft behaviour
Author :
Doll, C. ; Berard, Caroline ; Knauf, Andreas ; Biannic, Jean-Marc
Author_Institution :
Dept. of Syst. Control & Flight Dynamics DCSD, ONERA The French Aerosp. Lab., Toulouse
Abstract :
The objective of this paper is to illustrate that the standard form or Linear Fractional Transformation LFT framework is a unique and powerful framework to treat with nonlinear systems during control law synthesis and analysis. It is also shown that the expression linear in the acronym LFT is too restrictive as a nonlinear behaviour can be simulated by using the LFT framework. Within this paper, a precise and as small as possible LFT for a nonlinear 2-DOF aircraft with time varying parameters is derived. This LFT is validated both in a linear and nonlinear framework.
Keywords :
aircraft control; control system analysis; control system synthesis; nonlinear control systems; time-varying systems; 2-DOF longitudinal nonlinear aircraft; control law synthesis and analysis; linear fractional transformation; nonlinear systems; time varying parameters; Aerodynamics; Aerospace control; Aircraft; Control system synthesis; Mathematical model; Nonlinear control systems; Nonlinear dynamical systems; Nonlinear systems; Robust control; Uncertainty;
Conference_Titel :
Computer-Aided Control Systems, 2008. CACSD 2008. IEEE International Conference on
Conference_Location :
San Antonio, TX
Print_ISBN :
978-1-4244-2221-0
DOI :
10.1109/CACSD.2008.4627373
