Abstract

There are many dynamical systems that can be regarded as hierarchical networked sytems in a variety of fields related to worldwide crucial social problems such as environment, energy, transportation, and health. One of the ideas to treat those systems properly is "Glocal Control," which means that the global purpose is achieved by only local actions of control. The key for realization of glocal control is hierarchical networked dynamical systems with multiple resolutions in time and space depending on the layer. We first explain the background and introduce a unified framework for such a class of systems named LTI system with generalized frequency variable. Then, three different types of stability tests, namely Nyquist, Hurwitz, and Lyapunov, are shown, and the robust stability issue is discussed for treating the heterogeneous case. The second half of the talk is devoted to design methods of hierarchically decentralized control with both local and global objectives, where we show a method based on standard LQR optimal control and a method based on robust control with global/local shared model set. Through the talk we demonstrate applications of electric vehicle control to show the effectiveness of the theoretical results.

Short Bio

Shinji Hara received the B.S., M.S., and Ph.D. degrees in engineering all from Tokyo Institute of Technology, Tokyo, Japan, in 1974, 1976, and 1981, respectively. In 1984, he joined Tokyo Institute of Technology as an Associate Professor and has served as a Full Professor for ten years. Since 2002 he has been a Full Professor of the Department of Information Physics and Computing, The University of Tokyo, and he moved to Chuo University in April, 2017. His current research interests are in robust control, decentralized cooperative control for large-scale networked dynamical systems, system biology, glocal control. Dr. Hara received the George S. Axelby Outstanding Paper Award from the IEEE Control System Society in 2006. He was the President of SICE in 2009 and the Vice-President of the IEEE CSS in 2009-2010, IFAC Council member in 2012-, and Fellow of IFAC, IEEE and SICE.