Abstract
H ∞ control is an effective approach to handle model uncertainties. However, when modeling mismatch is large, it tends to be challenging to meet the desired requirements of both stability and performance by only using a single H ∞ controller. This study presents a switching method to enhance the robust stability and performance of H ∞ control by dividing the range of dynamics into multiple uncertain models. The candidate robust controllers are designed by solving a set of linear matrix inequalities for each uncertain model. A structural scheduling logic that selects the most proper controller into closed-loop is proposed. The selected controller can ensure bounded exponentially weighted H ∞ norm of the closed-loop switching systems. This work analyses their robust stability and disturbance attenuation performance via a linear fractional transformation by using the small gain theorem. The effectiveness of this method is validated with a fist-order inertial system with pure time delay.
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Recommended by Associate Editor Jiuxiang Dong under the direction of Editor Yoshito Ohta. This work was supported by the State Key Lab of Automotive Safety and Energy under grant KF16192, the National key research and development project under grant 2016YFB0101104 and 2016YFB0100900.
Feng Gao received his M.S. degree in vehicle engineering and Ph.D. degree in mechanical engineering in Tsinghua University, in 2003 and 2007, respectively. From February 2007 to February 2013, he worked as a senior engineer in Changan Auto Global R&D Centre, where he has led several key industrial projects involving electromagnetic compatibility, durability test of electronic modules, ADAS and engine control. From February 2013, he has been working as a professor in Chongqing University. His current research interests include robust control, optimization and multiple model approach with application to vehicle systems.
Dongfang Dang received his B.S. degree in Electrical Engineering from Henan Polytechnic University in 2013, and is currently pursuing a Ph.D. degrees in the College of Electric Engineering, Chongqing University. His research interests include driving assistance systems, vehicle active safety, and robust control.
Shengbo Eben Li received his M.S. and Ph.D. degrees from Tsinghua University, in 2006 and 2009. He worked at Stanford University in 2007, University of Michigan from 2009 to 2011, and University of California, Berkeley, in 2015. He is currently an associate professor in Department of Automotive Engineering at Tsinghua University. His active research interests include autonomous vehicle control, driver behavior and assistance, battery control for EVs/HEVs, optimal control and multi-agent control, etc.
Mengchu Zhou received his M.S. degree from Beijing Institute of Technology in 1986 and his Ph.D. degree from American Rensselaer Institute of Technology. He has been working in the Department of Electrical and Computer Engineering of New Jersey Institute of Technology from 1990. Now he is also a professor of the Yangtze River.
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Gao, F., Dang, D., Li, S.E. et al. Control of large model mismatch systems using multiple models. Int. J. Control Autom. Syst. 15, 1494–1506 (2017). https://doi.org/10.1007/s12555-016-0093-8
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DOI: https://doi.org/10.1007/s12555-016-0093-8