LAMIH Seminar "Numerical control of dynamic systems

Summary

Digital devices are now frequently used in many systems to collect data and ensure proper response for the closed-loop system. The existence of continuous and discrete time signals coexisting in a system results in a hybrid behavior that must be handled properly. In this talk, two approaches to controlling a dynamic system using a digital controller will be presented. The first approach is to consider the original system as a descriptor and then discretize it using a Taylor series expansion, which improves the accuracy as the degree of discretization increases. The other approach explores the framework of sampled-data systems and, instead of discretizing the system, the closed-loop system is described such that both the continuous-time and discrete-time parts are treated simultaneously. Both approaches can appropriately handle uncertain or variable parameter linear systems. In addition, the question of how to sample the system and how to choose an appropriate sampling time is also addressed in the presentation.

Brief Biography

Luciano Frezzatto received his B.Sc. in Computer Engineering, M.Sc. in Mechanical Engineering, and Ph.D. in Electrical Engineering from the University of Campinas - UNICAMP, Brazil, in 2009, 2011, and 2017, respectively. In 2015, he completed a one-year internship at the University of California San Diego as part of his PhD studies. Since 2018, he has been a professor at the Department of Electronic Engineering, Universidade Federal de Minas Gerais - UFMG. His research interests include robust control, LPV stability analysis, fuzzy and sampled data systems, and applications.

Contact: Antoine Dequidt