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Identification of CH-53G Bare Airframe Dynamics in Forward Flight

Schönenberg, Thorben (2009) Identification of CH-53G Bare Airframe Dynamics in Forward Flight. ODAS 2009 - 10th ONERA-DLR Aerospace Symposium, 06.-08. Okt. 2009, Berlin, Deutschland.

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Abstract

A six degree of freedom stability and control derivative model of a CH-53G helicopter was identified from flight test data to support flight control design activities using a frequency domain identification method. The model, representing the rigid body dynamics, is applicable in the frequency range of 0.2 to 10 rad/sec. Flight test data consisting of frequency sweeps and multistep inputs were collected in a dedicated test campaign. Data consistency was checked and unmeasured states were reconstructed. Frequency responses for the helicopter rigid body dynamics were calculated. A linear state-space model is fit to the frequency responses. Parameters are iteratively eliminated from the model structure based on robust metrics of parameter insensitivity and correlation. The final minimally parameterized model is driven with the recorded multistep control inputs and the predicted time histories are compared with the corresponding flight data.

Item URL in elib:https://elib.dlr.de/60378/
Document Type:Conference or Workshop Item (Paper)
Title:Identification of CH-53G Bare Airframe Dynamics in Forward Flight
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schönenberg, ThorbenUNSPECIFIEDUNSPECIFIED
Date:6 October 2009
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:CH-53G, system identification, CIFER, frequency response method, linear state-space model
Event Title:ODAS 2009 - 10th ONERA-DLR Aerospace Symposium
Event Location:Berlin, Deutschland
Event Type:international Conference
Event Dates:06.-08. Okt. 2009
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: Schönenberg, Thorben
Deposited On:26 Oct 2009 12:52
Last Modified:26 Oct 2009 12:52

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