International Federation of Automatic Control
3rd IFAC SYMPOSIUM on SYSTEM, STRUCTURE and CONTROL

Foz do Iguassu, Brazil October 17th - 19th, 2007

Wednesday Morning

Plenary Lecture on Applications of Differential Algebra


Chair: Alexandre Bazanella - Brazil
Room: Pacifico
2007-10-17
From 08:30 to 09:30
Some Applications of Differential Algebra in Systems Identification
Hebertt Sira-Ramírez
Contact: Hebertt Sira-Ramírez - Mexico
Abstract:
On-line closed loop system parameter identification for linear systems may be approached from an algebraic viewpoint based on non-commutative ring theory, module theory, and operational calculus. The approach can be made also robust with respect to a large class of system perturbation inputs and measurement noises. In this tutorial introduction to the algebraic approach for system identification and fast adaptive control, we illustrate, by means of simple examples, the use of the technique and some of its possible extensions. Copyright © 2007 IFAC.
H. Sira-Ramírez was born in San Cristóbal (Venezuela). He obtained the Electrical Engineer's degree from the Universidad de Los Andes in Mérida (Venezuela) in 1970. He later obtained the MSc in EE and the Electrical Engineer degree, in 1974, and the PhD degree, also in EE, in 1977, all from the Massachusetts Institute of Technology (Cambridge, USA). Over the years, he has been a Visiting Professor at several universities and research institutions in the United States, England, France, Argentina and Spain. Dr. Sira-Ramírez worked for 28 years at the Universidad de Los Andes where he held the positions of: Head of the Control Systems Department, Head of the Graduate Studies in Control Engineering and Vice-president of the University. Since 1998, he became an Emeritus Professor of that University. Currently, he is a Titular Researcher in the Centro de Investigación y Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-IPN) in México City (México), where he has held the positions of Academic Coordinator and Head of the Mechatronics Section. Dr Sira-Ramírez is a Senior Member of the Institute of Electrical and Electronics Engineers (IEEE), a Distinguished Lecturer from the same Institute and a Member of the IEEE International Committee. He has also been a member of the Society for Industrial and Applied Mathematics (SIAM), of the International Federation of Automatic Control (IFAC) and of the American Mathematical Society (AMS). He has published over 330 technical articles; over 120 of them in credited journals and the rest in refereed international conferences. Dr. Sira-Ramírez has authored over twenty chapters in contributed books and he is a coauthor of the books, Passivity Based Control of Euler-Lagrange Systems published by Springer-Verlag, in 1998, Algebraic Methods in Flatness, Signal Processing and State Estimation, Lagares 2003, Differentially Flat Systems, Marcel Dekker 2004, Control de Sistemas No Lineales Pearson-Prentice Hall 2006, Control Design Techniques in Power Electronics Devices, Springer-Verlag, 2006. He is the recipient of several regional and national scientific awards from his native country of Venezuela. He has been a member of the Academia de Mérida (Venezuela), where he served as Second and First Vice-president for several years. He is a level III member of the Sistema Nacional de Investigadores (Conacyt, México) and a level IV member of the Programa de Promoción del Investigador (Fonacyt, Venezuela). Dr. Sira-Ramírez is interested in the theoretical and practical aspects of feedback regulation of nonlinear dynamic systems with special emphasis in Variable Structure feedback control techniques and its applications in Power Electronics. He has also contributed in the area of Algebraic methods in Control, Estimation and Identification problems.