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Time and frequency-domain identification and verification of BO-105 dynamic modelsMathematical models for the dynamics of the DLR BO 105 helicopter are extracted from flight test data using two different approaches: frequency-domain and time-domain identification. Both approaches are reviewed. Results from an extensive data consistency analysis are given. Identifications for 6 degrees of freedom (DOF) rigid body models are presented and compared in detail. The extracted models compare favorably and their prediction capability is demonstrated in verification results. Approaches to extend the 6 DOF models are addressed and first results are presented. System identification is broadly defined as the deduction of system characteristics from measured data. It provides the only possibility to extract both non-parametric (e.g., frequency responses) and parametric (e.g., state space matrices) aircraft models from flight test data and therefore gives a reliable characterization of the dynamics of the actually existing aircraft. Main applications of system identification are seen in areas where higher accuracies of the mathematical models are required: Simulation validation, control system design (in particular model-following control system design for in-flight simulation), and handling qualities.
Document ID
19900009073
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kaletka, Juergen
(Deutsche Forschungs- und Versuchsanstalt fuer Luft- und Raumfahrt Brunswick (Germany, F.R.)., United States)
Gruenhagen, Wolfgang V.
(Deutsche Forschungs- und Versuchsanstalt fuer Luft- und Raumfahrt, Brunswick, Germany F.R. , United States)
Tischler, Mark B.
(NASA Ames Research Center Moffett Field, CA., United States)
Fletcher, Jay W.
(Army Aviation Research and Development Command Moffett Field, CA, United States)
Date Acquired
August 14, 2013
Publication Date
September 15, 1989
Subject Category
Aircraft Design, Testing And Performance
Report/Patent Number
AD-A216828
Meeting Information
Meeting: European Rotorcraft Forum
Location: Amsterdam
Country: Netherlands
Start Date: September 12, 1989
End Date: September 15, 1989
Accession Number
90N18389
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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