This paper introduces an adaptive flutter suppression control algorithm which is based on the iterative estimate of the aeroelastic plant and design of the feedback controller. In this algorithm, the dual-Youla parametrization is implemented as an essential part to estimate the open loop aeroelastic model from the closed loop experiment. The advantage of utilizing the dual-Youla parametrization...

In this paper, the classical triple-deck formalism is employed to investigate two instability problems in which an acoustic feedback loop plays an essential role. The first concerns a subsonic boundary layer over a flat plate on which two well-separated roughness elements are present. A spatially amplifying Tollmien-Schlichting (T-S) wave between the roughness elements is scattered by the downs...

In this note suboptimal distributed and boundary control strategies for uid ows governed by the Navier-Stokes equation (NSE) together with aspects of the numerical and practical implementation of the underlying algorithms are presented. The objective of our numerical investigations is the development of practically relevant feedback control laws for ows over the backward facing step. For what f...

This paper describes the ANSYS simulation of an electrostatically-actuated MEMS device, in which the drive voltages are computed using feedback control laws. The device consists of a movable electrode suspended on flexible, elastic structures, and one or more fixed drive electrodes. The feedback control laws are used to determine the level of a variable voltage supply in a drive circuit for eac...

We address the problem of enhancing mixing by means of boundary feedback control in 2D channel *ow. This is done by 6rst designing feedback control strategies for the stabilization of the parabolic equilibrium *ow, then applying this feedback with the sign of the input reversed. The result is enhanced instability of the parabolic equilibrium *ow, which leads rapidly to highly complex *ow patter...