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Design of Flutter Suppression Controllers for a Wing in Compressible Flow Based on High-Fidelity Aerodynamics

Micheli, Boris und Neumann, Jens und Arnold, Jürgen (2024) Design of Flutter Suppression Controllers for a Wing in Compressible Flow Based on High-Fidelity Aerodynamics. 20th International Forum on Aeroelasticity and Structural Dynamics, 2024-06-17 - 2024-06-21, Den Haag, Niederlande.

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Kurzfassung

Since active flutter suppression technologies could lead to more efficient aircraft, they are acquiring increasingly importance and research activities relying on wind tunnel demonstrators are flourishing to gain experience and knowledge. Aeroelastic models employed for control activities are traditionally based on Generalized Aerodynamic Forces (GAFs) computed through DLM in reduced frequency domain. The main limitation of this approach is that compressible flow exhibits nonlinearities which are not captured by DLM. To overcome this short coming, this paper solves the governing equations of motion in time domain coupling a structural dynamic solver and CFD Euler aerodynamics. The aeroelastic system is excited to identify the CFD GAFs which are coupled with the structural matrices yielding a more accurate state space realization of the aeroelastic system suited for control design activities. The state space realizations are then exploited to design H infinity-based flutter suppression controllers, which are implemented in the fully coupled computational fluid/structural dynamics solver to demonstrate the damping augmentation capabilities of the compensators. The approach is demonstrated on a realistic aeroelastic system and comprehensive nonlinear computations using controllers synthesized based on GAFs either computed via Euler CFD or uncorrected DLM are presented. Differences in the results, even at subsonic Mach numbers, will be explained based on comparative analyses of the different pressure fields, highlighting the benefits of using high-fidelity aerodynamics.

elib-URL des Eintrags:https://elib.dlr.de/204963/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Design of Flutter Suppression Controllers for a Wing in Compressible Flow Based on High-Fidelity Aerodynamics
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Micheli, BorisBoris.Micheli (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Neumann, JensJens.Neumann (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Arnold, JürgenJuergen.Arnold (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:Juni 2024
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:Aeroservoelasticity, Active Flutter Suppression, Compressible Aerodynamics, CFD-CSM Coupling, H-infinity control
Veranstaltungstitel:20th International Forum on Aeroelasticity and Structural Dynamics
Veranstaltungsort:Den Haag, Niederlande
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:17 Juni 2024
Veranstaltungsende:21 Juni 2024
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Effizientes Luftfahrzeug
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L EV - Effizientes Luftfahrzeug
DLR - Teilgebiet (Projekt, Vorhaben):L - Virtuelles Flugzeug und Validierung, L - Flugzeugsysteme, L - Flugzeugtechnologien und Integration
Standort: Göttingen
Institute & Einrichtungen:Institut für Aeroelastik > Aeroelastische Simulation
Hinterlegt von: Micheli, Boris
Hinterlegt am:02 Jul 2024 22:50
Letzte Änderung:02 Jul 2024 22:54

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