Fayssal Arichi

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In this paper we address both problem of discrete state and firing sequences estimation for Discrete Event Systems (DES) modeled by Petri nets(PN). We present a new and simple method to construct an Unknown Input observer for DES modeled by PN by using traditional methods for descriptor systems. The proposed observer is designed in order to estimate both(More)
In this paper, we will present a new and a simple method based on an Unknown Input observer to estimate the discrete state of the hybrid Photovoltaic systems (PV hybrid systems) where the evolution of the discrete part is governed by a Petri net. The discrete part is presented by the operating mode of the PV hybrid system and the continuous part is related(More)
In this paper, we focus on the synthesis of a hybrid observer for a class of nonlinear switched systems where the evolution of the discrete state is governed by a Petri Net. The switched systems, herein, considered are characterized by switching laws that can depend on both the continuous states and external events. A new observer composed of a continuous(More)
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