Séminaire de Chouaib Afri le 15 juin 10h-11h

Chouaib Afri, doctorant en automatique au LAGEP, donnera un séminaire

Date : Lundi 15 juin, 10h-11h
Lieu du séminaire : Ecole Centrale, Bât H9, Salle Aquitaine

Titre : Identification paramétrique en ligne de systèmes linéaires: approche par observateurs de Luenberger non-linéaires

Résumé :

Mes travaux de thèse s’inscrivent dans le thème de l’identification adaptative de systèmes dynamiques. En particulier, ce séminaire portera sur une méthode d’identification développée récemment pour des modèles linéaires MIMO à temps continu. Etant donné une structure de modèle « boite noire » sous forme de représentation d’état, il s’agit d’estimer en ligne à la fois l’état et les paramètres de ce modèle. L’idée de notre solution est de définir un système étendu (non linéaire) dont l’état est formé de toutes les inconnues du problème et ensuite de construire un observateur de Luenberger non linéaire pour en estimer l’état. Nous présenterons le principe de synthèse d’un tel observateur, les conditions de son existence ainsi qu’une méthode de construction effective. Les avantages potentiels de cette approche adaptative sont nombreux: vitesse de convergence réglable, modèle d’état actualisé en ligne par exemple pour faire de la supervision ou de la commande adaptative, capacité à s’adapter aux variations possibles de paramètres.

Certaines propriétés fondamentales de l’estimateur sont encore en cours d’investigation: conditions de garantie de la persistance d’excitation, robustesse aux bruits de mesure, taux de variation de paramètres maximum admissible. Nous discuterons brièvement les pistes de recherche envisagées.

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Prix 2014 de la meilleure thèse en automatique, GDR MACS


The LAGEP is pleased to announce that Humberto Stein Shiromoto won the prize for the best thesis of the GDR Macs, which is a national award and is awarded every two years.

We congratulate Shiromoto Humberto Stein for his work and his sympathy.

Thesis: June 23, 2014
Supervisor: Vincent ANDRIEULe LAGEP a le plaisir de vous annoncer que Humberto Stein SHIROMOTO a obtenu le prix de la meilleure thèse du GDR Macs qui est un prix national et décerné tous les deux ans.

Nous félicitons Humberto Stein SHIROMOTO pour son travail et sa sympathie.

Thèse soutenue le 23 juin 2014
Directeur de thèse : Vincent ANDRIEU

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Séminaire de Miroslav KRSTIC le 30/04/2015 à 08h30

As part of his visit, Professor Miroslav KRSTIC will make a presentation that will be coupled with the intervention of Federico Bribiesca Argomedo as part of a 1/2 day Control @ Lyon.

This is the program of the April 30th 2015, amphi Thémis 8

8h30 Welcome

9h00 Federico Bribiesca Argomedo

Title: Control and Observation of PDEs with Fredholm integrals
Abstract: In this talk an integral transform is presented which allows the construction of boundary control and observation laws for partial differential equations with Fredholm integrals. These systems do not have a strict-feedback structure and thus the standard backstepping approach cannot be applied. The focus of the presentation will be on first-order hyperbolic systems although some results for second-order parabolic systems will also be presented. The main remaining challenge is the extension of the class of coefficients for which the well-posedness of the kernel equations can be guaranteed.

10h00 Coffee
10h30 Miroslav KRSTIC

Title: Stabilization of a Population Dynamics Nonlinear PDE
Abstract: In the past few years, PDE backstepping has supplied tools for achieving stabilization of certain hyperbolic equations with boundary control and with sources of instability occurring away from the boundary. I will discuss a problem of a quite different nature – stabilization of a neutrally stable nonlinear hyperbolic PDE with in-domain actuation, where the control challenges arise from (1) the structure of the plant dynamics in which the full state of the system gets recirculated back from the PDE domain to the inlet boundary condition, (2) the fact that control multiplies the state, and (3) the fact that the state must be kept non-negative. This system models the dynamics of a bioreactor, where the “spatial variable” is not the physical space but the age of the microorganisms being grown in the bioreactor, and where the control input is the harvesting rate. We find a nonlinear infinite-dimensional transformation which reveals that the system’s relative degree is one and that its zero dynamics are autonomous and exponentially stable, which we prove using an ergodic theorem. We take advantage of this structure and achieve stabilization with a static output feedback law.

Valérie DSM et Damien Eberard

For students of the Doctoral School ED EEA, this seminar can be countedfor students whose first registration took place after 2012 (1st and 2nd year).

SiteDans le cadre de sa venue, le professeur Miroslav KRSTIC fera un exposé qui sera couplé avec l’intervention de Fédérico Bribiesca Argomedo, dans le cadre d’une 1/2 journée Control@Lyon.

Voici le programme du 30 avril 2015, amphi Thémis 8

8h30 Accueil

9h00 Federico Bribiesca Argomedo

Title: Control and Observation of PDEs with Fredholm integrals
Abstract: In this talk an integral transform is presented which allows the construction of boundary control and observation laws for partial differential equations with Fredholm integrals. These systems do not have a strict-feedback structure and thus the standard backstepping approach cannot be applied. The focus of the presentation will be on first-order hyperbolic systems although some results for second-order parabolic systems will also be presented. The main remaining challenge is the extension of the class of coefficients for which the well-posedness of the kernel equations can be guaranteed.

10h00 café
10h30 Miroslav KRSTIC

Title: Stabilization of a Population Dynamics Nonlinear PDE
Abstract: In the past few years, PDE backstepping has supplied tools for achieving stabilization of certain hyperbolic equations with boundary control and with sources of instability occurring away from the boundary. I will discuss a problem of a quite different nature – stabilization of a neutrally stable nonlinear hyperbolic PDE with in-domain actuation, where the control challenges arise from (1) the structure of the plant dynamics in which the full state of the system gets recirculated back from the PDE domain to the inlet boundary condition, (2) the fact that control multiplies the state, and (3) the fact that the state must be kept non-negative. This system models the dynamics of a bioreactor, where the “spatial variable” is not the physical space but the age of the microorganisms being grown in the bioreactor, and where the control input is the harvesting rate. We find a nonlinear infinite-dimensional transformation which reveals that the system’s relative degree is one and that its zero dynamics are autonomous and exponentially stable, which we prove using an ergodic theorem. We take advantage of this structure and achieve stabilization with a static output feedback law.

En espérant vous voir nombreux!
Bonne journée à tous
Valérie DSM et Damien Eberard

Pour les étudiants de l’école doctorale ED EEA, ce séminaire peut être décompté comme formation générale pour les étudiants dont la première inscription a eu lieu après 2012 (1ère et 2ème année).

Site

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Prix « Excellence in Drying Pharmaceuticals and Biologicals »

Séverine VESSOT has received the « Excellence in Drying Pharmaceuticals and Biologicals », prize granted by the company SANOFI during the 19th International Drying Symposium ‘IDS2014’ (Lyon Congress Center, France, 24-27 Août 2014). This prize recognizes her outstanding research work on freeze-drying of pharmaceuticals.Séverine VESSOT a reçu le prix « Excellence in Drying Pharmaceuticals and Biologicals », décerné par la société SANOFI à l’occasion du 19th International Drying Symposium ‘IDS2014’ (Centre des Congrès de Lyon, 24-27 Août 2014). Ce prix récompense les travaux de recherche de son équipe sur l’optimisation de la lyophilisation des produits pharmaceutiques.

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Prix 2014 de la meilleure thèse en génie des procédés, région Rhône Alpes

Julian BECKER, former PhD student at Lagep (thesis defended September 23, 2014), has received the 2014 award for the best PhD work in ‘Chemical Engineering’ in the Rhône-Alpes region, granted by the CODEGEPRA committee. The work concerned ‘Coupling of population balance modeling with computational fluid dynamics in turbulent emulsification systems’ and was directed by Dr Nida SHEIBAT-OTHMAN.Julian BECKER, ancien doctorant du LAGEP (thèse UCBL soutenue le 23 septembre 2014), a reçu le prix 2014 de la meilleure thèse en génie des procédés en région Rhône Alpes, attribué par le Comité de développement du génie des procédés en Rhône-Alpes (CODEGEPRA). Sujet: Coupling of population balance modeling with computational fluid dynamics in turbulent emulsification systems. Directeur de thèse: Dr Nida SHEIBAT-OTHMAN.

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Fin du projet ANR ‘SONONUCLICE’

Le projet ANR ‘SONONUCLICE’ (ANR-09-BLAN-0040-02) coordonné par Roman PECZALSKI (équipe PES) et intitulé ‘Contrôle par ultrasons de la nucléation de la glace pour l’optimisation des procédés de congélation et de lyophilisation’ s’est achevé en septembre 2014. Rapport final disponible sur la page web : http://sononuclice.mines-albi.fr/co/siteWeb.html

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5-ième Workshop LHMNLC 2015 de l’IFAC

The LAGEP organizes and hosts the 5th IFAC Workshop on Lagrangian and Hamiltonian Methods for Nonlinear Control in Lyon, 4-7th July 2015.

The detailed presentation of the event and the submission procedure may be consulted at website
http://www.lhmnlc15.org/

Important dates:

  • Submission of draft papers: January 31, 2015
  • Author notification: March 29, 2015,
  • Final paper due: May 17, 2015
  • Le LAGEP organise et reçoit le 5-ième Workshop de l’IFAC sur Les Méthodes Lagrangiennes et Hamiltoniennes en Automatique Non-Linéaire (LHMNLC 2015) à Lyon les 4-7 Juillet 2015.

    La présentation détaillée de l’évènement se trouve sur le site
    http://www.lhmnlc15.org/

    Dates importantes :

  • Limite de soumission: 31 janvier 2015;
  • Réponse aux auteurs: 29 mars 2015
  • Dépôt du texte final: 17 mai 2015
  • Filed under: actualité

    Seminaire de Delphine Bresch Pietri

    Thursday 20 of november, at 14h00 salle Jacques Bordet, Delphine will present a part of those works:
    Title: Implicit integral equations for modeling systems with a transport delay — Control stakes and open problems

    Abstract: Delays are well-known to be often related to transportation of material, e.g., when sensors and actuators are not co-located. In this talk, we focus on a particular class of such transport delay,
    satisfying an integral equation involving past values of the process flow rate. We illusrate the relevance of this modeling with experimental data from several fluid flow subsystems of thermal
    engines (Exhaust Gas Recirculation, after-treatment devices).

    In particular, we present experimental results carried out on an test-bench at GIPSA-lab, Grenoble, to control the mist inside an elongated tube. This test bench consists of a horizontal column
    equipped with a mist actuator located at the inlet and fans generating an air flow circulating along the tube. The control objective is to stabilize the mist at the output of the tube actuating
    on the wind speed (i.e. the fans velocities). Correspondingly, this set-up involves an integral-type transport delay (between the inlet and the output of the tube) which is also input-dependent.

    Finally, we draw some control perspectives and present related open problems.Jeudi 20 novembre, à 14h00 salle Jacques Bordet, Delphine nous présentera une partie de ses travaux :
    Title: Implicit integral equations for modeling systems with a transport delay — Control stakes and open problems

    Abstract: Delays are well-known to be often related to transportation of material, e.g., when sensors and actuators are not co-located. In this talk, we focus on a particular class of such transport delay,
    satisfying an integral equation involving past values of the process flow rate. We illusrate the relevance of this modeling with experimental data from several fluid flow subsystems of thermal
    engines (Exhaust Gas Recirculation, after-treatment devices).

    In particular, we present experimental results carried out on an test-bench at GIPSA-lab, Grenoble, to control the mist inside an elongated tube. This test bench consists of a horizontal column
    equipped with a mist actuator located at the inlet and fans generating an air flow circulating along the tube. The control objective is to stabilize the mist at the output of the tube actuating
    on the wind speed (i.e. the fans velocities). Correspondingly, this set-up involves an integral-type transport delay (between the inlet and the output of the tube) which is also input-dependent.

    Finally, we draw some control perspectives and present related open problems.

    Filed under: actualité