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Handling the Air Resonance Mode for Flight Control and Handling Qualities Evaluations on the DLR Research Helicopter FHS

Lantzsch, Robin and Hamers, Mario and Wolfram, Jens (2008) Handling the Air Resonance Mode for Flight Control and Handling Qualities Evaluations on the DLR Research Helicopter FHS. Rotorcraft Handling Qualities Conference 2008, 2008-11-04 - 2008-10-07, University of Liverpool, UK.

Full text not available from this repository.

Abstract

The paper presents the research carried out to handle the air resonance mode which occurs on the DLR EC135 FHS (Flying Helicopter Simulator) research helicopter. The air resonance mode on the FHS is excited in particular when roll rate feedback loops in the flight control system are closed. A flight test campaign was conducted to gather data of the air resonance mode for different roll rate feedback gains. A model, determined by system identification, is tuned to optimally match the model response with the flight test data for different roll rate feedback gains. Based on this model, subsequently, an air resonance controller was developed and tested that effectively suppresses the excitation of the air resonance mode resulting from roll rate feedback. The final air resonance controller concept was extensively flight tested to study the influence on the flight control performance and handling qualities.

Item URL in elib:https://elib.dlr.de/55897/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Handling the Air Resonance Mode for Flight Control and Handling Qualities Evaluations on the DLR Research Helicopter FHS
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Lantzsch, RobinUNSPECIFIEDUNSPECIFIED
Hamers, MarioUNSPECIFIEDUNSPECIFIED
Wolfram, JensUNSPECIFIEDUNSPECIFIED
Date:4 November 2008
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Keywords:FHS, control design, air resonance, regressive lag, dipole cancelling controller, DCC
Event Title:Rotorcraft Handling Qualities Conference 2008
Event Location:University of Liverpool, UK
Event Type:international Conference
Event Dates:2008-11-04 - 2008-10-07
Organizer:Royal Aeronautical Society
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:19 Nov 2008
Last Modified:27 Apr 2009 15:24

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