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Integration of Rigid and Aeroelastic Aircraft Models using the Residualised Model Method

Looye, G. (2005) Integration of Rigid and Aeroelastic Aircraft Models using the Residualised Model Method. IFASD 2005, München, June 28 - July 1, 2005.

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Abstract

This article describes a procedure for development of an integrated model of a flexible aircraft by combining available flight dynamics and aeroelastic models. Both types of models mostly complement each other. However, two overlaps are typically present that should be properly taken care of. In the first place, rigid aircraft flight dynamics models usually already take the deformation of the airframe quasi-statically into account in the aerodynamics computation. Second, aeroelastic models also contain so-called rigid-body modes that correspond with the flight dynamics degrees of freedom. The adopted solution is to leave the flight dynamics model unchanged, and to remove rigid modes and the quasi-static influence on the flight dynamics from the aeroelastic model. This article presents an extension to previously published work, introducing a method for properly handling of so-called unsteady aerodynamic lag states. As a spin-off result, it will be shown how the proposed procedure can be used to correct rigid body dynamics in an aeroelastic state space model.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2005,
Title:Integration of Rigid and Aeroelastic Aircraft Models using the Residualised Model Method
Authors:
AuthorsInstitution or Email of Authors
Looye, G.UNSPECIFIED
Date:2005
Status:Published
Keywords:Flight mechanics, Aeroelasticity, Model integration, Rational Function Approximation, Simulation
Event Title:IFASD 2005, München, June 28 - July 1, 2005
Organizer:CEAS/AIAA/DGLR International Forum on Aeroelasticity and Structural Dynamics 2005
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L ST - Starrflüglertechnologien
DLR - Research theme (Project):UNSPECIFIED
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Robotics and Mechatronics > System Dynamics and Control (former Control Design Engineering)
Deposited By: elib DLR-Beauftragter
Deposited On:16 Sep 2005
Last Modified:12 Mar 2010 14:48

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