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Disturbance Observer-Based Control to Suppress Air Resonance for the EC135 ACT/FHS Research Helicopter

Greiser, Steffen (2015) Disturbance Observer-Based Control to Suppress Air Resonance for the EC135 ACT/FHS Research Helicopter. AIAA SciTech 2015, 2015-01-05 - 2015-01-09, Kissimmee, FL.

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Kurzfassung

Increased safety and reduced workload are two main goals for helicopter pilot assistance systems. Feedback control is one possible mean to get towards these goals. In conjunction with hinge- and bearingless main rotor concepts further improvement of the handling qualities are expected. But this rotor concept suffers from air resonance: a self-excited oscillation caused by the coupling of the rotor blades' (regressive) lead-lag especially with body roll motion. Excellent handling quality ratings may require aggressive maneuvering with high agility that is often realized using relatively large feedback gains. Especially the roll rate feedback gain was found to excite air resonance. This paper shows a possible solution consisting in suppressing air resonance by means of a disturbance observer-based control. That allows high-agility maneuvering flight with excellent handling qualities. Three major topics are discussed: The state-space model derived by system identification, the design of the disturbance observer and compensation, and the testing with a highly modified research helicopter that is called ACT/FHS (Active Control Technology / Flying Helicopter Simulator). The results are compared to previously derived and flight-tested filters.

elib-URL des Eintrags:https://elib.dlr.de/96492/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Disturbance Observer-Based Control to Suppress Air Resonance for the EC135 ACT/FHS Research Helicopter
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Greiser, Steffensteffen.greiser (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:5 Januar 2015
Referierte Publikation:Nein
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:helicopter, air resonance, ACT/FHS, control, feedback
Veranstaltungstitel:AIAA SciTech 2015
Veranstaltungsort:Kissimmee, FL
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:5 Januar 2015
Veranstaltungsende:9 Januar 2015
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Hubschrauber
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L RR - Rotorcraft Research
DLR - Teilgebiet (Projekt, Vorhaben):L - Der intelligente Drehflügler (alt)
Standort: Braunschweig
Institute & Einrichtungen:Institut für Flugsystemtechnik > Hubschrauber
Hinterlegt von: Greiser, Steffen
Hinterlegt am:06 Okt 2015 14:22
Letzte Änderung:24 Apr 2024 20:02

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