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

fYear

2008

fDate

3-5 Sept. 2008

Firstpage

864

Lastpage

869

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/CACSD.2008.4627373

Filename

4627373