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Unveiling modal parameters with forced response using SVD and QR during flutter flight testing
Barros Rodriguez, José; Fernandez Fructuoso, José Miguel; Flores Le Roux, Roberto Maurice; Sanchez Prieto, Sebastián; Rodríguez Polo, Oscar
Universitat Politècnica de Catalunya. Departament de Física; Universitat Politècnica de Catalunya. GMNE - Grup de Mètodes Numèrics en Enginyeria
This article presents an algorithm for the identification of modal parameters during flutter flight testing when forced excitation is employed and the aircraft possesses several sensors for structural response acquisition. The main novelty of the method, when compared with other classical modal analysis methods, is that the analysis is carried out in intervals of time instead of in the whole duration of the excitation. It means that, even when the response signal is only partially available, some modal parameters may be still identified. Application to analytic signals as well as structural response of modern fighter aircraft using frequency-swept excitation is provided in order to demonstrate the effectiveness, robustness and noise immunity of the proposed method.
Peer Reviewed
Àrees temàtiques de la UPC::Aeronàutica i espai::Aerodinàmica
Àrees temàtiques de la UPC::Enginyeria mecànica
Aeroelasticity
Flutter (Aerodynamics)
Damping (Mechanics)
Flight flutter
Damping
Modal parameters identification
SVD
QR factorization
Aeroelasticitat
Amortiment (Mecànica)
info:eu-repo/semantics/submittedVersion
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