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Increasing Handling Qualities and Flight Control Performance using an Air Resonance Controller

Lantzsch, Robin and Wolfram, Jens and Hamers, Mario (2008) Increasing Handling Qualities and Flight Control Performance using an Air Resonance Controller. In: AHS International Forum 64, Proceedings CD-ROM. American Helicopter Society 64th Annual Forum, 2008-04-29 - 2008-05-01, Montréal, Canada.

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This paper presents the effect of an air resonance controller on handling qualities ratings and flight control performance. The investigations were done by using the research helicopter FHS (Flying Helicopter Simulator) operated at DLR. The air resonance mode occurs when roll rate feedback loops are closed. In order to cancel the oscillatory phenomenon it was decided to develop and investigate an independent air resonance controller. An offline design environment incorporating models which reproduce the air resonance phenomenon was developed. As a result two air resonance controller concepts could be defined. These two controllers were flight tested on the FHS and analyzed towards their reduction of air resonance when closing the roll rate feedback loop. The dipole cancelling controller was selected as the most promising approach and further flight tested with respect to the influence on handling quality ratings, flight control performance and stability.

Item URL in elib:https://elib.dlr.de/55022/
Document Type:Conference or Workshop Item (Paper)
Title:Increasing Handling Qualities and Flight Control Performance using an Air Resonance Controller
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Date:May 2008
Journal or Publication Title:AHS International Forum 64, Proceedings CD-ROM
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
EditorsEmailEditor's ORCID iD
American Helicopter Society (AHS), UNSPECIFIEDUNSPECIFIED
Keywords:FHS, control design, air resonance, regressive lag
Event Title:American Helicopter Society 64th Annual Forum
Event Location:Montréal, Canada
Event Type:international Conference
Event Dates:2008-04-29 - 2008-05-01
Organizer:American Helicopter Society (AHS)
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Rotorcraft (old)
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Smart Rotorcraft (old)
Location: Braunschweig
Institutes and Institutions:Institute of Flight Systems > Rotorcraft
Deposited By: Lantzsch, Robin
Deposited On:26 Aug 2008
Last Modified:27 Apr 2009 15:10

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