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System Identification of Flexible Aircraft in Time Domain

de Oliveira Silva, Bruno Giordano and Mönnich, Wulf (2012) System Identification of Flexible Aircraft in Time Domain. AIAA Atmospheric Flight Mechanics Conference, 13. - 16. Aug. 2012, Minneapolis, Minnesota, USA.

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The paper proposes and demonstrates the applicability of the system identification methodology in time domain to include the effects of structural motion on the flight dynamics of an aircraft treated as an elastic body. For this end, flight tests using a high-performance sailplane equipped with special flight test instrumentation were performed. The structural motion is represented in terms of those normal modes which influence and are influenced by the rigid-body response. The coupling between rigid-body and structural motion is obtained through aerodynamic forces in terms of generalized stability and control derivatives, which are estimated using the output error method in the time domain. The conventional rigid-body stability and control derivatives as well as the deflections of the normal modes at the measurement points are estimated. The model dynamics incorporate two anti-symmetric and three symmetric normal modes. A validation analysis shows the improvements obtained by using the integrated model when compared to the traditional rigid-body approach.

Item URL in elib:https://elib.dlr.de/77990/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:System Identification of Flexible Aircraft in Time Domain
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
de Oliveira Silva, Bruno GiordanoUNSPECIFIEDUNSPECIFIED
Mönnich, Wulfwulf.moennich (at) dlr.deUNSPECIFIED
Date:August 2012
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:System Identification, Flight Test, Flexible Aircraft
Event Title:AIAA Atmospheric Flight Mechanics Conference
Event Location:Minneapolis, Minnesota, USA
Event Type:international Conference
Event Dates:13. - 16. Aug. 2012
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignment
DLR - Research theme (Project):L - no assignment (old)
Location: Braunschweig
Institutes and Institutions:Institute of Flight Systems > Flight Dynamics and Simulation
Deposited By: Mönnich, Wulf
Deposited On:13 Feb 2013 14:57
Last Modified:13 Feb 2013 14:57

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