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.