WIT Press

On The Optimal Placement Of Piezoelectric Elements For Active Flutter Suppression

Price

Free (open access)

Paper DOI

10.2495/SM980171

Volume

38

Pages

16

Published

1998

Size

1,187 kb

Author(s)

F. Botta, M. de Benedetti & R. Barboni

Abstract

The optimal placement of PZT elements for the active flutter suppression of a real wing is discussed. The motion equations of wing bending and torsion are considered. The modal shapes are calculated with the Galerkin method, projecting the real wing modal shapes on those of an approximated model with an exponential stiffness and mass distribution similar to the real wing, having a closed form analytical solution. A non-stationary aerodynamic flow has been considered. A closed loop feedback control has been applied on the vibration amplitudes through the minimisation of a quadratic objective function. To this aim, a "tensor-distance" function is defined, in analogy with the distance between two points. It has been demonstrated that the minimisation of the "tensor-distance" bet

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