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Commande Predictive Generalisee Non Lineaire A Temps Continu Des Systemes Complexes
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Book Synopsis Commande prédictive généralisée non linéaire à temps continu des systèmes complexes by : Marcelin Dabo
Download or read book Commande prédictive généralisée non linéaire à temps continu des systèmes complexes written by Marcelin Dabo and published by . This book was released on 2010 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: We address through this thesis asymptotic output tracking based on nonlinear continuous-time generalized predictive control (NCGPC). Some specific assumptions are necessary for the application of this control design method. NCGPC has two parameters that are the relative degree and the prediction horizon time which are, respectively, intrinsic and extrinsic to the nonlinear system. Its control law is derived from the minimization of a quadratic criterion based on the prediction error (up to an order equal to the relative degree) between the chosen output(s) and their corresponding reference signal(s). This control law leads to a linear closedloop system with a guaranteed stability for a relative degree less than or equal to four. Beyond four, instability occurs. To avoid this issue, Chen et al. introduce as a third parameter the order r of the successive derivatives of the control with respect to time, chosen so that its difference in relation to the relative degree must be less than four. We propose, in this work, two approaches verifying the above assumptions, having in common the modification of the criterion while keeping parameter r equal to zero with guaranteed closed-loop stability (for a relative degree greater than four). The first approach consists in adding a linear term with respect to the control to the criterion while the second consists in adding to the prediction matrix of the criterion an "intelligent" matrix of correction (it vanishes when correction is not necessary). Important properties are presented for SISO nonlinear systems of relative degree one or two.
Book Synopsis Commande Prédictive Non Linéaire À Temps Continu de Systèmes Complexes by : COLLECTIF.
Download or read book Commande Prédictive Non Linéaire À Temps Continu de Systèmes Complexes written by COLLECTIF. and published by Omniscriptum. This book was released on 2010-10 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ces travaux portent sur la poursuite asymptotique de trajectoire bas e sur la commande pr dictive g n ralis e non lin aire temps continu (NCGPC). L'application de cette technique de commande requiert la v rification d'assomptions pr cises. La NCGPC est caract ris e par deux param tres: le degr relatif et l'horizon de pr diction, respectivement, intrins que et extrins que au syst me. Sa loi de commande r sulte de la minimisation d'un crit re quadratique bas e sur l'erreur de pr diction entre la(es) sortie(s) choisie(s) et le(es) signal(aux) de r f rence correspondant(s). Elle lin arise le syst me non lin aire en boucle ferm e et lui garantit la stabilit de facto sous certaines conditions. Au-del de quatre, il y a instabilit . Pour r soudre ce probl me, Chen et al. ont introduit un troisi me param tre, qui est l'ordre des d riv es successives de la commande par rapport au temps, choisi de sorte que sa diff rence avec le degr relatif soit inf rieure quatre. Nous proposons dans ce travail, deux approches qui v rifient les m mes assomptions mentionn es ci-dessus et ayant en commun la stabilit du syst me lin aire boucl r sultant.
