Título: "Event-triggered and time-triggered hybrid controls for switched affine systems: applications to power converters"

impartida por la profesora Carolina Albea,

Universidad de Toulouse. 

Día 28 de enero de 10 a 12 en el aula 009. 

Breve resumen: Switched Affine Systems (SASs) are encountered in many applications including DC-DC power conversion, biochemical networks, aerospace and urban traffic. These systems are characterized by the fact there is not a common equilibrium with the consequence that asymptotic stabilization of a desired functioning point is not possible with finite switching rates (uniform dwell time). 

This seminar will present stabilization methods of such a class of systems via a hybrid dynamical paradigm. The advantages of this framework relies on the possibility to account for the full continuous/discrete nature of SASs. More especially, it allows to represent in a consistent and elegant manner controllers with periodic as well as aperiodic updates, driving to a time-triggered and event-triggered controls. 

 An event-triggered control  strategy under a HDS paradigm is designed for SASs based on a Lyapunov matrix-based min-projection. This innovative and relevant solution is applicable to power converters, which reduces switching, while increasing the life of these systems and reducing the energy dissipated. 

In many occasions, the control law has to be periodically updated in a time-triggered method, as it is generally encountered in electronics applications. A new paradigm different to the Lyapunov matrix-based min-projection control is developed, a free-matrix based control law, providing some advantages compared with other control results. 

Perfil:  Carolina Albea Sánchez completed an international thesis between the University of Seville (Spain) and the University of Grenoble (France), about advanced control laws for power converters. After her PhD defended in 2010, her researches continued with a post-doctoral contract at Alternative Energies and Atomic Energy Commission (CEA) in France, working on developing network controllers for Systems on Chips, being composed of different time dynamics. Then, she joined the University of Toulouse 3-Paul Sabatier (France) in 2011 and the research laboratory, Laboratory of Analysis and Architecture of Systems (LAAS-CNRS), as associated professor. Her main research topics include hybrid control of switched systems, hybrid dynamical systems applications, control of electronic converters and distributed control. Currently, she enjoys of a Sabbatical year in the Dpt. of Engineering of Systems and Automatic at Seville University.