Title :

On Discretization of Sliding Mode Control

Speaker :

Professor Xinghuo Yu

Director of RMIT Platform Technologies Research Institute

Royal Melbourne Institute of Technology University, Australia

Venue :

Room 215, William M. W. Mong Engineering Building, CUHK

Date :

Jan 21, 2010, Thursday
2:30 PM - 3:30 PM

Abstract :

Sliding mode control (SMC) is a discontinuous control, aiming to create the so-called sliding mode by changing control structures. An infinite switching frequency is usually required to maintain an ideal sliding mode. SMC has been extensively studied over the last sixty years due to its simplicity and robustness. It is well known that when SMC is implemented digitally, phenomena such as chattering and chaos may occur due to limited sampling rate for discretization.

In this talk, we will explore discretization behaviors in SMC systems and evaluate the disrectization effect on SMC. We will show that under certain conditions asymptotical stability of the discretized SMC systems can be guaranteed and upper bounds of the eventually convergent system states can be analytically computed. We will also show various periodic trajectory patterns and their intrinsic properties using the symbolic dynamics approach.

Biography :

Prof. Xinghuo Yu received BSc and MSc degrees from University of Science and Technology of China, Hefei China, in 1982 and 1984, and PhD degree from South-East University, Nanjing China in 1988, respectively. He is now with RMIT University (Royal Melbourne Institute of Technology), Melbourne Australia, where he is the Director of RMIT Platform Technologies Research Institute. Prof. Yu`s research interests include variable structure and nonlinear control, complex and intelligent systems and applications. He has published over 350 refereed papers in technical journals, books and conference proceedings.

Prof. Yu has served as an Associate Editor of IEEE Transactions on Circuits and Systems Part I (2001-2004), IEEE Transactions on Industrial Informatics (2005-2008), IEEE Transactions on Industrial Electronics (2007-Present) and several other scholarly journals. He received the 1995 Central Queensland University (Australia) Vice Chancellor`s Award for Research, and was made Emeritus Professor of Central Queensland University in 2002 for his long term contributions.

Prof. Yu is Vice-President (Planning and Development) of IEEE Industrial Electronics Society and an IEEE Distinguished Lecturer. He is an IEEE Fellow, a Fellow of Institution of Engineers Australia, and a Chang Jiang Scholar Endowed Chair Professor.

    **************************************** ALL ARE WELCOME ****************************************

Enquiries: Ms. Winnie Wong or Prof. Wen J. Li, Department of Mechanical and Automation Engineering, CUHK at 2609 8337. *MAE Series (2009-10) is contained in the World-Wide Web home page at http://www3.mae.cuhk.edu.hk/maeseminars.php#mae.