Seminar: Eduardo Schultz, doctorant à l’université RWTH/Aachen

Eduardo Schultz, a PhD student at RWTH/Aachen under the supervision of Pr Alexander Mitsos, is visiting the LAGEP this month, and will give a seminar on Friday 27 October 14h, room Jacques Bordet.

Title: Dynamic optimization with inequality path constraints

Dynamic optimization with inequality path constraints is present in several engineering problems, where the models are usually described by a system of ODEs, DAEs or PDEs. These problems are infinite problems with infinite degrees of freedom and infinite constraints, since the optimization is performed over the independent variables domain. Most of the methods available in the literature to solve dynamic optimization problems do not guarantee the satisfaction of constraints over the entire domain. Two algorithms are presented in order to solve dynamic optimization problems which guarantee satisfaction of path constraints. The first algorithm is applied to systems described by PDEs, based on an adaptavie restriction and relaxation of the path constraint, extending the algorithm developed by Fu et al., 20151. The second one is a new algorithm based on Taylor approximation of the path constraint, that can be applied to ODEs and DAEs. Both algorithms are ilustrated by a case study composed by a PFR reactor where the objective is to maximize the concentration of product leaving the reactor, controlling the temperature in the jacket and without violating the maximum temperature inside the reactor.
1Fu J et al., 2015, Local optimization of dynamic programs with guaranteed satisfaction of path constraints, AUTOMATICA, Vol: 62, Pages: 184-192.

Seminar of Professor A. J. van der Schaft, University of Groningen

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.

Yacine Chitour of the L2S gives a seminar in the Bordet room at the LAGEP at 14:00.

Sorry, this entry is only available in Français.

” From Doctorate to Employment “

The Université de Lyon proposes in the section “Doctorat”, the setting up of a new system initiated by the Department of Doctoral Studies at the University of Lyon, with the expertise of OPE (Objective for Employment), ” From Doctorate to Employment “.

It is presented in the form of a six-month program led by experts, for the support of doctors tailored to the search for a permanent job outside the academic sector. This course is based on a collective dynamic led by professional trainers, and associated with a personalized accompaniment adapted to their profile.

The program of the device, with the contacts to be taken, is

http://www.universite-lyon.fr/doctorat/l-universite-de-lyon-lance-un-nouveau-dispositif-du-doctorat-a-l-emploi–353353.kjsp?RH=PHD

and a Presentation Note ED-OPE 07-2017-1

Seminar : Swann Marx (GIPSA Lab-LAGEP)

On Thursday, September 14, at 2:00 pm in room E302 of the CPE building, Swann Marx (GIPSA Lab-LAGEP) will present his thesis work. He will support his thesis on 20 September in Grenoble. His work focuses on the stabilization of EDPs by saturated control.

This is the summary of his presentation.

ABSTRACT :
This thesis provides contributions in stabilization methods for nonlinear dynamical systems. In particular, it focuses on two main subjects: the analysis of infinite-dimensional systems subject to saturated inputs and the design of output feedback laws for either infinite-dimensional or finite-dimensional systems.

The presentation will focus on the first subject.

In the first part, we will introduce a more general class of saturations than the one known for finite-dimensional systems. When bounding a linear stabilizing feedback law with such nonlinearity, a well-posedness result together with an attractivity result will be stated for systems whose open-loop is defined by operators generating strongly continuous semigroup of contractions. The attractivity result will be proved by using the LaSalle’s Invariance Principle together with some compactness properties.

In the second part, a particular nonlinear partial differential equation is studied, namely the Korteweg-de Vries equation, that models long waves in water of relatively shallow depth. A control actuating on a small part of the channel will be considered. This control will be modified with two different types of saturations. The attractivity result will be proved by using Lyapunov argument and a contradiction argument. Finally, the results will be illustrated with some numerical simulations.

Two professors, Prof. Yao Pengfei and Prof. Guo Baozhu, from the Chinese Academy of Sciences, visits LAGEP

Nous accueillons deux professeurs, Prof. Yao Pengfei et Prof. Guo Baozhu, de l’académie des sciences de Chine, en visite au LAGEP. Nous avons programmé deux conférences données à partir de 13h30 à la salle F001 CPE le jeudi 29 juin 2017.

Voici les titres et les résumés des conférences :

13h30

Title : Why we need Riemannian Geometry for the Control of the Wave Equation with Variable Coefficient,
Pengfei YAO, Academy of Mathematics and Systems Science, Academia Sinica.

Abstract: I will present a brief comparison between several methods which have been used in the literature to show why Riemannian geometry is necessary for control of the wave equation with variable coefficients. The classical multipliers are generalized to a version of the Riemannian geometry setting with help of the Bochner technique to find out verifiable geometric assumptions for control of the wave equation with variable coefficients in space. Thus controllability/stabilization of the wave equation with variable coefficients comes down to an escape vector field for the Riemannian metric, given by the variable coefficients.

14h45
Title : A Nonlinear Extended Stated Observer Based on Switching Functions,
Bao-Zhu GUO, Academy of Mathematics and Systems Science, Academia Sinica.

Abstract: In the last two decades, there is a new emerging control technology called active disturbance rejection control (ADRC) proposed by Jingqing Han of the Chinese Academy of Sciences, which has been widely used in engineering control in many countries. Progress from a theoretical perspective was made only in last few years. In this talk, I will briefly introduce ADRC and focus on some recent results on extended state observers for nonlinear systems, a key part of ADRC. Numerical results are also presented to compare with other control methods.

Nous vous souhaitons nombreux à la demie journée thématique.

Control@Lyon Day

At the Lyonnaise automatic community and others!!

On 6 and 7 July, the “Workshop on incremental methods in control” is organized by Control @ Lyon.

You can find information about this event on:
https://sites.google.com/view/woimc/accueil

A form is required to attend!
https://docs.google.com/forms/d/e/1FAIpQLSdQfkUjvoW9AhZDb40xklGd8t_vgU8eKHlWQmsiRh5om5Dr9A/viewform

Guests:
Fulvio Forni
Paolo Forni
Vincent Fromion
Ian Manchester
Laurent Praly
Björn Rüffer
Giovanni Russo
Ricardo Sanfelice
Cyrus Mostajeran
Nathan Van de Wouw

Venue and Local information:

The workshop will take place in CPE Lyon, 3 rue Victor Grignard, 69622 Villeurbanne.

Journées du LAGEP : June 22nd and 23rd, 2017

These scientific days are an unmissible annual meeting for the laboratory. They are an excellent opportunity for the PhD students to present their angoing research (oral presentations and poster sessions) to the laboratory staff and partners. They will take place on June 22nd and 23rd, 2017 at Petit-Amphi of CPE Lyon. Event not to be missed !

Scientific program HERE

Contacts :

    Isabelle Pitault (pitault@lagep.univ-lyon1.fr)
    Noureddine Lebaz (noureddine.lebaz@univ-lyon1.fr)

LAGEP is member of Carnot institut since 2011.

(Français) Concours Logo LAGEP

Hello everyone,

Last month we proposed to our PhD students and post-doctoral students to remaster the LAGEP logo.
Oceane makes the following proposition:

So if you like, vote for!

21st of June: Conference of Prof Ana Grenha from the University of Algarve (Portugal).

Prof Ana Grenha from the University of Algarve (Portugal) will present a lecture.

The title is
: “Inhalable dry powders for pulmonar tuberculosis therapy”

The conference will take place at Salle Bordet the 21st of June from 9h30 to 10h30.

Attached a short biography of Prof Ana Grenha

Ana Grenha has graduated in Pharmacy at Instituto Politécnico do Porto in 2001 and concluded her PhD in Pharmaceutical Technology in 2007, at the University of Santiago de Compostela, developing a Thesis on Nanomedicines applied to systemic pulmonary administration.

Ana Grenha is currently Assistant Professor of Pharmaceutical Technology at the Department of Chemistry and Pharmacy of the University of Algarve, since 2007. Being member of both the Centre for Biomedical Research (CBMR) and the Centre for Marine Sciences (CCMar), both of the University of Algarve, she is the Group Leader of the Drug Delivery Laboratory, which mainly develops research in the area of lung delivery. Ana Grenha has authored more than 40 papers/book chapters and 1 international patent, also having experience as Section Editor and Guest Editor in International Journals. In addition, she has supervised 9 Master Students and is the supervisor of 4 PhD students.