Foued Ben Amara

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A regulator design method is presented for switched bimodal linear systems, where it is desired to reject known disturbance signals and/or track known reference inputs. The switching in the bimodal system is defined by a switching surface. The regulator design approach consists of three steps. The first step is based on constructing a switched(More)
Motivated by practical applications such as active vibration control and noise attenuation, this paper presents an adaptive Youla (Q) parameterized regulation approach to reject unknown sinusoidal adaptive system. The proposed regulation approach is applied to a benchmark problem involving unknown vibration attenuation in an active suspension system. Both(More)
Motivated by a class of contact vibration control problems in mechanical systems, this paper considers a regulation problem for discrete-time switched bimodal linear systems where it is desired to achieve output regulation against partially known deterministic and unknown random exogenous signals. First, a set of observer-based Youla parameterized(More)
In this paper, the shape control problem for a magnetic fluid deformable mirror using a discrete-time multivariable PID controller is studied. First, the design of a stabilizing multivariable PID controller for discrete-time systems subject to a pole clustering constraint is proposed based on properly formulated linear matrix inequalities. The design(More)
This brief addresses the problem of adaptive regulation in retinal imaging adaptive optics systems against the unknown and time-varying aberrations present in the eye. The proposed controller design approach relies on two steps. The first step is to construct a -parameterized set of stabilizing controllers for the multi-input multi-output system under(More)
Visual artifacts found in videos compressed at low bitrates may be the results of various decisions made in the encoding process. Although many post-processing techniques are available to detect and reduce such artifacts, they often lead to undesired blurriness and require extensive computations. A better approach is to avoid such artifacts in the first(More)