Jeudi 24 Mai, Jean Auriol et Amaury Hayat vont venir pour présenter leurs travaux de recherche qui concernent (pour parti) le contrôle d’équations hyperboliques.
Sur cette journée du 24 Mai, nous allons en profiter pour faire une journée Control@Lyon autour de cette thématique.
La journée commencera à 11h00 par une présentation d’Alexandre Terrand-Jeanne. Les deux invités donneront alors une présentation dans l’après midi.
Plus d’informations sur Jean et Amaury sur leur page web:
11h00 Alexandre Terrand-Jeanne, (LAGEP, Lyon).
Title : Regulation of linear PDE’s by P-I controller using a Lyapunov approach inspired by forwarding methods. Theory and application to the drilling case
Abstract : Most of the existing results for the regulation of PDE’s are based on semi-group and spectral theory. However, these results impose bounds on the control and the measurement operators. For instance, the boundary regulation by boundary control of hyperbolic PDE can not be addressed. In order to deals with more general systems, we introduce a novel Lyapunov functionnal inspired by nonlinear forwarding technics. Our approach is then illustrated in the case of a drilling system.
13h30 Jean Auriol, ENSMP, Paris
Title : Delay-robust stabilization of first-order linear hyperbolic PDEs.
Abstract: In this talk we solve the problem of delay-robust stabilization for systems composed of two linear first order hyperbolic equations. More precisely, one must go back to the classical trade-off between convergence rate and delay-robustness: we prove that, for systems with strong reflections, canceling the reflection at the actuated boundary will yield zero delay-robustness. The proof is based on the equivalence between the considered class of PDEs and neutral-differential equations with distributed delays. This equivalence is obtained using the backstepping approach as an analysis tool. Finally, some extensions for the robust stabilization in presence of delays, but also uncertainties on the parameters and disturbances are proposed.
14h30 Amaury Hayat, UPMC Paris
Title : Stabilization of 1-D nonlinear hyperbolic systems with boundary controls, and application to Burgers and Saint-Venant equations
Abstract: In this talk, we will review several methods to stabilize such systems with very simple controls at the boundaries, based on a Lyapunov approach. In particular, we will show that the general Saint-Venant system, a well-known model for shallow waters used in practice for the regulation of navigable rivers, has a particular structure that enables the stabilization of any of its regular steady-states by simple boundary controls, whatever the source term is. This remains true even if the source term and the physical data associated (bathymetry, friction, section width, etc.) are unknown. This feat comes from the existence of a remarkable local entropy that we will discuss. We will see how to stabilize a shock steady-state for the Burgers equation and a hydraulic jump modeled by the Saint-Venant equations. Finally, we will talk about the design of Proportional-Integral controllers which are very much used in practice while remaining quite hard to handle mathematically for nonlinear infinite dimensional systems.
Room location: CPE Lyon, 3 rue victor Grignard, 69622 Villeurbanne, Room F101 – Batiment CPE.
Pour rappel, vous pouvez retrouver toutes ces informations sur la page web :
The PEI Hai-Long seminar, professor at South China University of Technology,
will be held on Thursday, April 12 at 14:00, LAGEP J. Bordet room.
Title : Research on Unmanned Aerial Systems at South China University of Technology
Abstract : In recent years, Unmanned Aerial Vehicle (UAV) systems have stimulated tremendous interest in academia and industry in China besides the evidence of enormous UAV production in consuming market, because they can potentially greatly
benefit industry in many modern-day applications. However, numerous technical issues have to be addressed before these applications can be successfully and reliably deployed. At South China University of Technology, we have two major centers devoted to research and development in UAV, namely the Ministry of Education Key Lab of Autonomous Systems and Networked Control, and the Unmanned System Engineering Center of Guangdong Province. To strengthen the connections between academic research and system integration in companies, our laboratory has conducted a broad series of projects for development of theory and algorithms, and building of new hardware platforms for a wide range of uses. This talk will discuss the close connections between education, academic research, and system integration in several of our company projects. New techniques will be presented for multi-vehicle relative navigation, fast and precise sea coastal zone surveying, 3D geospatial mapping for laying oil pipelines, and disaster monitoring. The overall objective of our work is to develop innovative theory, efficient algorithms, and novel vehicle platforms to enable UAVs to possess powers well beyond their existing capabilities.
Jeudi 29 Mars, Sylvain Bertrand, ingénieur de recherche à l’ONERA (Office National de Recherche En Aérospatiale) donnera une présentation au LAGEP sur
Commande et estimation basées optimisation : combinaison avec des méthodes analytiques et applications aérospatiales
Vous trouverez un résumé de sa présentation ICI.
Jérome Bastien, MCU of the Interuniversity Laboratory of Motor Biology (LIBM), Lyon I University, will give a seminar in Bordet Room, Thursday 26/04/2018, 14:00
Title : Friction, Identification in Biomechanics and train circuits.
Summary : I worked on the modeling of friction laws on dynamic systems with finite number of degrees (theoretical results of existences and uniqueness and convergence of numerical schemes). These models have, among other things, been used to model real systems (engine belt tensioner or rolling vehicles). For about ten years, I am interested in the modeling of the movement within the CRIS, become LIBM. From experimental data, procedures for identifying biomechanical parameters have been developed in the case of some simple movements.
Recently, the complete analytical description of the plane workspace (the area of the plane that can reach the distal end of the upper limb of a human for example) has been proposed, in a purely geometric way, without any symbolic calculation, such as is usually done.
At the same time, a patent was filed in 2012 on miniature train tracks. In addition to theoretical enumeration results, oddly resembling the notion of self-avoiding polygons, a didactic and geometric use by this game is being exploited for high school students.
I will expose all of this work from the presentation, simplified and updated, of my HDR (2013), available on http://utbmjb.chez-alice.fr/recherche/articles_provisoires/HDRtranspa_Jbastien.zip
On Thursday 05/04/2018, 14:00 LAGEP, Bordet Room, Romain Postoyan, CR-CNRS from Cran de Nancy will present his work.
Title: Hybrid Control.
On Thursday 29/03/2018 at 14:00, LAGEP, Salle Bordet, Sylvain Bertrand from ONERA will present his works.
Title: Optimization-Based Command and Estimation: Predictive Command and Sliding Horizon Observers and Aeronautical Applications (UAV control for MPC – with some experiments – and space debris trajectory estimation for the MHE ).
MY PARTNERSHIP RESEARCH in 180s enables researchers from the Carnot Engineering@Lyon Institute to present
their partnership research experience with an SME that has led to an innovative object.
1st prize : a value of 50 000 € is the financing of a postdoc for one year
Closing : January 16, 2018
INFORMATION AND CANDIDACY TO SEND TO: firstname.lastname@example.org
04 72 29 15 69
Pedro soutiendra sa thèse le vendredi 15 décembre 2017 à 14h00
Salle et lieu : Amphi C223, CPE
Le titre en français et en anglais :
- Etude du procédé d’hydroconversion des résidus pétroliers en phase slurry en mode recyclage
- Study of the slurry-phase hydroconversion of petroleum residues in recycling mode
Le résumé de sa thèse en français est ICI.
La soutenance est confidentielle. Les personnes qui assistent doivent signer un accord de confidentialité. Name: Pedro ALVAREZ
Directors: Melaz Tayakout
Beginning of the thesis: 05/01/2015
Expected end of the thesis: 04/01/2018
Funding: TOTAL CIFRE Raffinage-Chimie
The seminar presented by Arbi Moses-Badlyan (Technical University of Berlin) will take place on Thursday 7 December at 14:00 in room J. Bordet on the following subject:
Title: Open State Space Formulation of Reactive Mixtures
Complex physical systems have been successfully modelled as metriplectic systems, which are state space formulations that have become famous under the acronym GENERIC (General Equation for the Non-Equilibrium Reversible Irreversible Coupling). GENERIC is typically formulated for isolated systems and consist of two main parts, a Hamiltonian part represented by a Poisson bracket and an entropic part represented by a so called dissipation bracket.
In this talk I present results of a joint work were we have been able to set up an operator based open state space formulation that encodes the weak-formulation of the partial-differential field equations describing the dynamics of a reactive mixture of viscous heat-conducting Newtonian fluids. Our operator based open state space formulation via duality pairing induces a bracket formulation that has the properties of a metriplectic system such that the first and in particular the second law of thermodynamics are satisfied.
Arbi Moses Badlyan – PhD Student
Supervisors: Prof. Christopher Beattie (Virginia-Tech) and Prof. Volker Mehrmann (TU-Berlin)
In joint work with:
Christoph Zimmer – PhD Student
Supervisors: Prof. Christopher Beattie (Virginia-Tech) and Prof. Volker Mehrmann (TU-Berlin)
A seminar will be given by Professor A. J. van der Schaft of the University of Groningen, visiting professor at LAGEP on Thursday 19 October 2017 at 14:00 in room G111.
The title and summary of this seminar are:
Title: Stabilization of optimal supply-demand values for power networks
Abstract: Key constraint in the control of power networks is supply-demand matching, where the total consumed power is equal to the total generated power. Optimization of the so-called social welfare function under the constraint of supply-demand matching leads to an optimal set-point for the operation of the power network. Continuous-time implementation of the primal-dual gradient algorithm converging to this optimal set-point defines a distributed dynamical controller for the physical power network. It will be shown that the optimal set-point is an asymptotically stable equilibrium of the resulting closed-loop system. Main idea in the proof is the port-Hamiltonian modeling of the physical network, as well as of the primal-dual gradient controller, leading to an insightful Lyapunov function.