Defesa de Exame de Qualificação – Carla de Souza – 13/8/2019

19/08/2019 14:40
Defesa de Exame de Qualificação
Aluna Carla de Souza
Orientador Prof. Eugênio de Bona Castelan Neto, Dr. – DAS/UFSC
Coorientador Prof. Valter Júnior de Souza Leite, Dr. – UFMG
Data

 

13/8/2019  13h30  (terça-feira)

Sala PPGEAS I (piso superior)

 

Banca

Prof. Rodolfo Cesar Costa Flesch, Dr. – DAS/UFSC (presidente);

Prof. Jeferson Vieira Flores,  Dr. – DEEL/UFRGS;

Prof. Daniel Ferreira Coutinho, Dr. – DAS/UFSC.

Título An Augmented State Lyapunov Approach applied to LPV and Networked Control of Delayed Systems under Constraints
Abstract: In this work, we address the problem of input-to-state stabilization of parameter-varying (LPV) discrete-time systems with delayed states and saturating actuators. It is assumed that the time-varying delay belongs to a known interval and its maximum variation between two consecutive instants has a limited rate. We propose convex conditions for the synthesis of both state-feedback controllers and dynamic output controllers. The approach is based on the Lyapunov theory, on the rewriting of the delayed systems as an augmented delay-free switched system (Hetel et al., 2008) and on the application of the generalized sector condition to deal with the saturating actuators. To illustrate the efficiency of our approaches, we present numerical examples that are compared with other techniques of the literature. Moreover, we propose the extension of these results for the Networked Control Systems (NCS) case. The communication network has been largely used in industrial control systems due to its many advantages over traditional control systems. However, its presence can generate drawbacks that can degrade system performance, or even destabilize it. The search for more effective tools to deal with these problems has become a challenge in recent years. As the use of the approach proposed by (Hetel et al., 2008) in methodologies oriented to the systems with varying parameters and constraints is new, it is believed that its application in networked control problems may result in methodological and tool advances in this field of study.