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Tuesday, July 9 • 16:50 - 17:10
LPV MODELING FOR FLUTTER BOUNDARY PREDICTION FROM TESTING DATA

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To greatly enhance the reliability of flutter testing, a new framework based on linear parameter varying (LPV) theory is proposed herein for aircraft flutter boundary prediction. The new framework comprises three steps: reduced-order linear time-invariant (LTI) model identification, LPV modeling and flutter boundary prediction. Firstly, a set of LTI models on different test points are obtained by using state space identification method. Then, with the aid of state-space model interpolation of local estimates (SMILE) technique, a set of LTI models is converted into the LPV model with external scheduling parameters, such as dynamic pressure. Finally, robust stability analysis of LPV model enables us to make an accurate flutter boundary prediction. The numerical simulation conducted on a two degree of freedom airfoil demonstrates the efficiency of the proposed approach.

Moderators
avatar for Simon Jones

Simon Jones

Associate Professor, Rose-Hulman Institute of Technology
Professional interests include undergraduate engineering education, finite element modeling, ground-borne vibrations, vibrations of musical instruments, and dynamics of toys.
GM

Guilhem Michon

Professor, ISAE-SUPAERO

Authors

Tuesday July 9, 2019 16:50 - 17:10 EDT
St-Laurent 7
  T07 Struct. dyn. & nonlin. vib., RS03 Struct ac & vibr

Attendees (3)