Lojewski, Reinhard und Keßler, Christoph (2021) Analysis Methods for Ground Resonance in Partial Ground Contact. In: 77th Annual Vertical Flight Society Forum and Technology Display: The Future of Vertical Flight, FORUM 2021, 77th (0050). The Vertical Flight Society. VFS International 77th Annual Forum & Technology Display, 2021-05-10 - 2021-05-14, Online. doi: 10.4050/F-0077-2021-16767. ISBN 978-171383001-6.
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Offizielle URL: https://proceedings.vtol.org/77/html/papers.cfm#Lojewski0050
Kurzfassung
Soft-in-plane rotor systems are susceptible to a self-induced vibration phenomenon called ground resonance. This dynamic instability results from lag motions of the rotor blades coupling with airframe degrees of freedom while the helicopter is in ground contact. As an addition to previous studies of nonlinear landing gear effects, this work presents the Matrix Pencil Method as a useful additional tool for signal analysis of perturbed nonlinear systems. Contrary to simple logarithmic decrements of decaying time-series, the Matrix Pencil Method allows additional insight into the underlying structure. This makes the method interesting for ground resonance. Additionally, the Lyapunov Exponent Method is introduced to highlight and analyze nonlinear effects in helicopter substitute models.
elib-URL des Eintrags: | https://elib.dlr.de/143437/ | ||||||||||||
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Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||||||
Titel: | Analysis Methods for Ground Resonance in Partial Ground Contact | ||||||||||||
Autoren: |
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Datum: | 10 Mai 2021 | ||||||||||||
Erschienen in: | 77th Annual Vertical Flight Society Forum and Technology Display: The Future of Vertical Flight, FORUM 2021 | ||||||||||||
Referierte Publikation: | Nein | ||||||||||||
Open Access: | Ja | ||||||||||||
Gold Open Access: | Nein | ||||||||||||
In SCOPUS: | Ja | ||||||||||||
In ISI Web of Science: | Nein | ||||||||||||
Band: | 77th | ||||||||||||
DOI: | 10.4050/F-0077-2021-16767 | ||||||||||||
Verlag: | The Vertical Flight Society | ||||||||||||
Name der Reihe: | Proceedings of the 77th Annual Forum | ||||||||||||
ISBN: | 978-171383001-6 | ||||||||||||
Status: | veröffentlicht | ||||||||||||
Stichwörter: | Ground Resonance, nonlinear system, stability analysis, nonlinear stability analysis, Bodenresonanz, nichtlineare Systeme, Stabilitätsanalyse, Nichtlineare Stabilitätsanalyse | ||||||||||||
Veranstaltungstitel: | VFS International 77th Annual Forum & Technology Display | ||||||||||||
Veranstaltungsort: | Online | ||||||||||||
Veranstaltungsart: | internationale Konferenz | ||||||||||||
Veranstaltungsbeginn: | 10 Mai 2021 | ||||||||||||
Veranstaltungsende: | 14 Mai 2021 | ||||||||||||
Veranstalter : | Vertical Flight Society | ||||||||||||
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 - Virtueller Hubschrauber und Validierung | ||||||||||||
Standort: | Braunschweig | ||||||||||||
Institute & Einrichtungen: | Institut für Flugsystemtechnik > Hubschrauber Institut für Flugsystemtechnik > Leitungsbereich FT | ||||||||||||
Hinterlegt von: | Lojewski, Reinhard | ||||||||||||
Hinterlegt am: | 01 Feb 2022 14:59 | ||||||||||||
Letzte Änderung: | 24 Apr 2024 20:43 |
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