Paper published in a book (Scientific congresses and symposiums)
Limit Cycle Prediction For Subsonic Aeroelastic Systems Using Nonlinear System Identification
Dimitriadis, Grigorios; Vio, Gareth Arthur; Cooper, Jonathan Edward
2003 • In Ferman, M. A.; Petersson, B. A. T.; Rizzi, S. A.et al. (Eds.) Proceedings of the VIII International Conference on Recent Advances in Structural Dynamics
[en] The prediction of aeroelastic instabilities caused by nonlinear unsteady aerodynamic forces
acting on aircraft has recently become an important area of research. Emphasis is placed on
the capability to predict the occurrence of Limit Cycle Oscillations (LCOs) at both the design
and prototype testing stages. In this paper, the prediction of LCOs is attempted for a simulated
aeroelastic system subjected to nonlinear subsonic unsteady aerodynamic forces, using system
identification. Response data from the simulated system are curve-fitted by means of a series
of polynomial basis functions. This approach yields very accurate identified models of the
actual system at individual flight conditions. These identified models are extrapolated to a
global aeroelastic identified model. Using this model, the flight conditions at which LCOs
occur is accurately predicted but the amplitude of the oscillations is underestimated.
Disciplines :
Aerospace & aeronautics engineering
Author, co-author :
Dimitriadis, Grigorios ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Intéractions fluide structure et aérodynamique expérimentale
Vio, Gareth Arthur; University of Manchester > School of Engineering
Cooper, Jonathan Edward; University of Manchester > School of Engineering
Language :
English
Title :
Limit Cycle Prediction For Subsonic Aeroelastic Systems Using Nonlinear System Identification
Publication date :
July 2003
Event name :
8th International Conference on Recent Advances in Structural Dynamics
Event organizer :
Institute of Sound and Vibration, University of Southampton
Event place :
Southampton, United Kingdom
Event date :
du 14 juillet au 16 juillet 2003
Audience :
International
Main work title :
Proceedings of the VIII International Conference on Recent Advances in Structural Dynamics
Editor :
Ferman, M. A.
Petersson, B. A. T.
Rizzi, S. A.
Wentz, K.
Publisher :
Institute of Sound and Vibration, Southampton, United Kingdom
