Abstract
The objective of this paper is to present a synthesis method of reduced-order active flutter suppression (AFS) systems. AFS systems of a two-dimensional airfoil (2D-AFS) are first designed by mixed sensitivity reduction problem in H∞ control theory (H∞-mix). Secondary to reduce the order of the H∞ controller, the coprime factorization (weighted) controller reduction method (CFW) is then extended lo apply the controllers that are designed by using other than the LQG control theory. It is shown in the numerical example that H∞-mix controllers give more increase of the flutter velocity than the LQG and H2-mix ones, and the extended CFW method is useful to reduce the order of Hie H∞-mix controllers
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