A Nonlinear Modal Aeroservoelastic Analysis Framework for Flexible Aircraft

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Title: A Nonlinear Modal Aeroservoelastic Analysis Framework for Flexible Aircraft
Authors: Wang, Y
Wynn, A
Palacios, R
Item Type: Journal Article
Abstract: A nonlinear formulation in modal coordinates of the equations of motion of a flexible aircraft is presented. It relies on the projection of the intrinsic equations of geometrically nonlinear composite beams on the linear normal modes at a reference condition, which are coupled with two-dimensional unsteady aerodynamics. The resulting description is suitable for nonlinear dynamic analysis and control design, whereas the description in modal coordinates links directly to linear aeroservoelastic analysis methods. Results are presented on and compared to cantilever wings and full aircraft configurations previously studied in the literature. Linear H∞H∞ control synthesis and closed-loop nonlinear simulations are finally explored on a highly flexible flying wing under large-amplitude discrete gusts. Results show the ability of the proposed framework to capture the nonlinear dynamics of the aeroelastic system, while providing a seamless integration with linear methods, as well as its strength in identification of the dominant contributors to the nonlinear response.
Issue Date: 3-Jun-2016
Date of Acceptance: 22-Feb-2016
URI: http://hdl.handle.net/10044/1/32442
DOI: https://dx.doi.org/10.2514/1.J054537
ISSN: 1533-385X
Publisher: American Institute of Aeronautics and Astronautics
Start Page: 3075
End Page: 3090
Journal / Book Title: AIAA Journal
Volume: 54
Issue: 10
Copyright Statement: Yinan Wang, Andrew Wynn, and Rafael Palacios. "Nonlinear Modal Aeroservoelastic Analysis Framework for Flexible Aircraft", AIAA Journal, Vol. 54, No. 10 (2016), pp. 3075-3090. http://dx.doi.org/10.2514/1.J054537. Copyright © 2016 by Yinan Wang, Andrew Wynn and Rafael Palacios. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission.
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
Engineering & Physical Science Research Council (EPSRC)
Funder's Grant Number: EP/I014683/1
Keywords: Aerospace & Aeronautics
0901 Aerospace Engineering
0913 Mechanical Engineering
Publication Status: Published
Appears in Collections:Faculty of Engineering

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