This paper presents a systematic study on active flutter suppression of a high aspect-ratio wing with multiple control surfaces distributed throughout the span. The dynamic characterization of the wing structure is done by the finite element method. Doublet lattice method is used to model unsteady aerodynamic loads acting on the lifting surface with leading-edge and trailing-edge control surfaces. The open-loop aeroelastic equations with input delays are established by the modal transformation of the structural equations and the minimum state approximation of the aerodynamic influence coefficient matrix. To suppress flutter of the time-delayed system, a dynamic controller is synthesized in Hinfinite control theory framework. The delay-dependent stability of the closed-loop system is analyzed by tracing the rightmost eigenvalues of the system. Numerical simulations are made to demonstrate the effectiveness of all the above approaches.
Flutter suppression of a high aspect-ratio wing with multiple control surfaces
Flatterunterdrückung eines Flügels mit hohem Seitenverhältnis und mit Mehrfachsteuerflächen
Journal of Sound and Vibration ; 324 , 3-5 ; 490-513
2009
24 Seiten, 15 Bilder, 1 Tabelle, 15 Quellen
Article (Journal)
English
Flutter suppression of a high aspect-ratio wing with multiple control surfaces
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