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Active Flutter Suppression of a Highly Flexible Swept Wing through Multiple Flap Control

Waitz, Stefan (2022) Active Flutter Suppression of a Highly Flexible Swept Wing through Multiple Flap Control. In: 19th International Forum on Aeroelasticity and Structural Dynamics, IFASD 2022. International Forum on Aeroelasticity and Structural Dynamics (IFASD) 2022, 13.-17. Juni 2022, Madrid, Spanien. ISBN 978-840942353-8.

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Future commercial aircraft designs tend to light-weight wing structures for energy and cost saving reasons. The slenderness and flexibility of these higher aspect-ratio wings might show susceptibility not only to lower flutter flight speeds. Also, the danger of a larger number and variety (e.g. through sweep induced coupling) of potentially wing-dominated flutter modes is impending. The main objective of the submitted work is to depict a suitable control methodology, and show how dynamic stability of highly flexible wings can be achieved by actively influencing the aeroelastic behaviour of the overall deformed structure. On the prediction side, the design, build-up and analysis of aero-servoelastic simulation models become necessary. The incorporation of active control elements like sensors, actuators and controllers leads to closed-loop models. On simulation side, the strategic goal of this investigation is to reach the capability of completely erasing any kind of flutter occurrence, with no restrictions, neither in composition (e.g. heave, torsion, in-plane sway or flap dominated) nor in number (e.g. up to 4) of eigenmodes. The design of the controller transfer functions turned out to be crucial. In order to have the desired variety of eigenmodes at disposal, here a number of three configurations of the nominal generic wing design (baseline with five deflection-controlled flaps plus two modifications) underwent the analyses. By means of active flutter suppression (AFS), formerly unstable wing configurations could be transferred into aeroelastic stable flight conditions at any point of a potential flight envelope.

Item URL in elib:https://elib.dlr.de/188295/
Document Type:Conference or Workshop Item (Speech)
Title:Active Flutter Suppression of a Highly Flexible Swept Wing through Multiple Flap Control
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Date:June 2022
Journal or Publication Title:19th International Forum on Aeroelasticity and Structural Dynamics, IFASD 2022
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:Aeroelastic stability, active flutter suppression (AFS), aero-servoelasticity (ASE), flap control, slender wings, structural dynamics
Event Title:International Forum on Aeroelasticity and Structural Dynamics (IFASD) 2022
Event Location:Madrid, Spanien
Event Type:international Conference
Event Dates:13.-17. Juni 2022
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Efficient Vehicle
DLR - Research area:Aeronautics
DLR - Program:L EV - Efficient Vehicle
DLR - Research theme (Project):L - Virtual Aircraft and  Validation
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Aeroelastic Simulation
Deposited By: Waitz, Dr.-Ing. Stefan
Deposited On:15 Sep 2022 12:45
Last Modified:18 Aug 2023 11:48

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