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Reduction of nonlinear models for control applications

Reduction of nonlinear models for control applications
Reduction of nonlinear models for control applications
A systematic approach to the model reduction of high-fidelity fluid-structure-flight models and the subsequent flight control design for very flexible aircraft is considered. The test case is for an unmanned aerial vehicle. The full order model involves the geometrically-exact nonlinear beam equations coupled with a linear aerodynamic model. A nonlinear reduced order model is derived to reduce the computational cost and dimension of the full order nonlinear system while retaining the ability to predict nonlinear effects. The approach uses information on the eigenspectrum of the coupled system Jacobian matrix and projects the system through a series expansion onto a small basis of eigenvectors representative of the full order dynamics. The small dimension model is then used to design control laws for applications sush as load alleviation. Results are presented for an aerofoil section and an unmanned aerial vehicle model to illustrate the approach.
978-1-62410-223-3
Da Ronch, A.
a2f36b97-b881-44e9-8a78-dd76fdf82f1a
Tantaroudas, N. D.
12303349-1026-48e8-ba09-8c4d59f65d43
Badcock, K. J.
64c4dc5d-1f2f-4358-af31-f6506c1810ef
Da Ronch, A.
a2f36b97-b881-44e9-8a78-dd76fdf82f1a
Tantaroudas, N. D.
12303349-1026-48e8-ba09-8c4d59f65d43
Badcock, K. J.
64c4dc5d-1f2f-4358-af31-f6506c1810ef

Da Ronch, A., Tantaroudas, N. D. and Badcock, K. J. (2013) Reduction of nonlinear models for control applications. 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Boston, United States. 07 - 10 Apr 2013. 19 pp . (doi:10.2514/6.2013-1491).

Record type: Conference or Workshop Item (Paper)

Abstract

A systematic approach to the model reduction of high-fidelity fluid-structure-flight models and the subsequent flight control design for very flexible aircraft is considered. The test case is for an unmanned aerial vehicle. The full order model involves the geometrically-exact nonlinear beam equations coupled with a linear aerodynamic model. A nonlinear reduced order model is derived to reduce the computational cost and dimension of the full order nonlinear system while retaining the ability to predict nonlinear effects. The approach uses information on the eigenspectrum of the coupled system Jacobian matrix and projects the system through a series expansion onto a small basis of eigenvectors representative of the full order dynamics. The small dimension model is then used to design control laws for applications sush as load alleviation. Results are presented for an aerofoil section and an unmanned aerial vehicle model to illustrate the approach.

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More information

Published date: April 2013
Venue - Dates: 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Boston, United States, 2013-04-07 - 2013-04-10
Organisations: Aerodynamics & Flight Mechanics Group

Identifiers

Local EPrints ID: 351935
URI: http://eprints.soton.ac.uk/id/eprint/351935
ISBN: 978-1-62410-223-3
PURE UUID: 882ee978-c47f-4591-8212-e9e35c07f33a

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Date deposited: 02 May 2013 15:03
Last modified: 25 Nov 2021 23:22

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Contributors

Author: A. Da Ronch
Author: N. D. Tantaroudas
Author: K. J. Badcock

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