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SHORT COURSE: Hybrid observer for switched nonlinear systems

Start Date: February 16, 2015 10:00 AM
End Date: February 16, 2015 12:00 PM

Professor Mohamed Djemai

University of Valenciennes et Hainaut-Cambrésis

Abstract: The main topic of this presentation deals with the problem of constructing observers for switched nonlinear systems, which includes, as a specific case, the design of hybrid observers based on high order sliding mode technique. The high order sliding mode is used to overcome the occurring chattering phenomena which induces some irrelevant and undesirable phenomenon for mechanical systems. The proposed approach, based on the Fliess canonical form, allows also to the observers to give and estimation of the discrete location of the system, which indicates the dynamic in evolution. The convergence of the observers is proved and a stick-mass-friction system is used to illustrate the efficiency of the proposed hybrid observers. The second part of the presentation will focus on discrete observer for detection of actif mode for switched systems. Some examples will be presented to illustrates the efficiency of the presented  approach.

Bio: Mohamed DJEMAI,  IEEE Senior member,  is a full professor Professor at the University of Valenciennes, France since 2008. He is with LAMIH–Laboratory of Industrial and Human Automation, Mechanics and Computer Science, CNRS. UMR-8201, He is a member of Automatic Control Department. He received his B.Sc. in electrical engineering from Ecole Nationale Polytechnique d’Alger, Algeria in 1991, M.Sc. (DEA) and Ph. D. in  in automatic control from University de Paris-Sud, Paris, France in 1992 and january 1996. He joined the ENSEA as associate professor. He was Vice director of ECS-Laboratory.  He is member of 2 IFAC Technical Committee : TC. 2.1 control system, and. TC. 1.3 on Discrete Event and Hybrid Systems, and IEEE Control System Society. Prof. Djemaï was visiting professor at Norhumbria university (2010-2013).  His research interests are mainly related to nonlinear control systems, observation, and fault detection theory including hybrid system control, sliding mode, and variable structure systems, with applications to power systems, robot and vehicles. He was a General chair of IEEE-ICSC'2013 Conf., EFEA'2012 (in Newcastle UK) and EFEA'2014 in (Paris, France), Conf. on Environnement Friendly Energies and Application,  and  CEIT'2015 (in Tlemcen, Algeria). He is co-editor of the book : Hybrid Dynamical System : Observation and Control, Springer, 2014.