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Accueil > Evénements Scientifiques > Conférences et Séminaires > Conférences et Séminaires 2013 > Active control of boundary layer instabilities : the effects of actuator/sensor choice

Active control of boundary layer instabilities : the effects of actuator/sensor choice

22 novembre 2013

Active control of boundary layer instabilities : the effects of
actuator/sensor choice

Séminaire Onofrio Semeraro - post-doc au LadHyX

Vendredi 29 novembre à 15H30 en salle Castex 1er Etage

Résumé :

In this talk, we revise recent results in the active control of boundary layer instabilities.
First, we analyze the role of the sensor placement with respect of the closed-loop dynamics of the system in terms of stability and robustness. Full-order Linear Quadratic Gaussian (LQG) controllers are used in order to assess the best performance achievable ; it is shown that in disturbance feedforward control configuration open-loop model reduction is always able to guarantee the same performance obtained by a full-order LQG. In the remainder of the presentation, the delay of transition to turbulence is achieved by quenching three-dimensional perturbations. A setup consisting of localized actuators in the spanwise direction is used.

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