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Aeroelastic control and estimation with a minimal nonlinear modal description

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Title: Aeroelastic control and estimation with a minimal nonlinear modal description
Authors: Artola, M
Goizueta, N
Wynn, A
Palacios, R
Item Type: Journal Article
Abstract: Modal-based, nonlinear Moving Horizon Estimation (MHE) and Model Predictive Control(MPC) strategies for very flexible aeroelastic systems are presented. They are underpinned by an aeroelastic model built from a 1D intrinsic (based on strains and velocities) description of geometrically-nonlinear beams and an unsteady Vortex Lattice aerodynamic model. Construction of a nonlinear, modal-based, reduced order model of the aeroelastic system, employing a state-space realisation of the linearised aerodynamics around an arbitrary reference point, allows us to capture the main nonlinear geometrical couplings at a very low computational cost. Embedding this model in both MHE and MPC strategies, which solve the system continuous-time adjoints efficiently to compute sensitivities, lays the foundations for real-time estimation and control of highly flexible aeroelastic systems. Finally, the performance and versatility of the framework operating in the nonlinear regime is demonstrated on two very flexible wing models, with notably different dynamics, and on two different control setups: a gust-load alleviation problem on a very high aspect ratio wing with slower dynamics, which involves substantial deflections; and flutter suppression on a flexible wing with significantly faster dynamics, where an unconventional nonlinear stabilisation mechanism is unveiled.
Issue Date: 16-Apr-2021
Date of Acceptance: 21-Dec-2020
URI: http://hdl.handle.net/10044/1/86809
DOI: 10.2514/1.J060018
ISSN: 0001-1452
Publisher: American Institute of Aeronautics and Astronautics
Start Page: 2697
End Page: 2713
Journal / Book Title: AIAA Journal: devoted to aerospace research and development
Volume: 59
Issue: 7
Copyright Statement: © 2021 by M. Artola, N. Goizueta, A. Wynn, and R. Palacios. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission. All requests for copying and permission to reprint should be submitted to CCC at www.copyright.com; employ the eISSN 1533-385X to initiate your request. See also AIAA Rights and Permissions www.aiaa.org/randp.
Sponsor/Funder: Commission of the European Communities
Engineering and Physical Sciences Research Council
Funder's Grant Number: 765579
Marie Sklodowska-Curie grant agreement No 765579
2297076
Keywords: Aerospace & Aeronautics
0901 Aerospace Engineering
0905 Civil Engineering
0913 Mechanical Engineering
Publication Status: Published
Online Publication Date: 2021-04-16
Appears in Collections:Aeronautics
Faculty of Engineering