It is well known that various control tasks ( optimization of cost functionals, stabilization and etc.) cannot be performed by using continuous feedbacks. But an application of discontinuous feedback immediately poses a question of its robustness with respect to external disturbances, actuator and measurement errors. In this paper we discuss a concept of discontinuous feedback for control syste...

A probability-based robust control design methodology is presented that is applied to the \benchmark system," which is a highdelity model of an active-mass-driver laboratory structure. For the controller design, the objective is to maximize the probability that the uncertain structure/controller system achieves satisfactory performance when subject to uncertain excitation. The controller's robu...

Laminar separation bubbles in a flat-plate boundary layer flow with a velocity drop of 10%, 20%, and 25% applied locally at the free-stream boundary of the integration domain have been investigated by means of direct numerical simulations. Different steady and unsteady boundary layer disturbances were introduced at a disturbance strip upstream of separation and their effects on the separation b...