title: Robust levitation control for maglev systems with guaranteed bounded airgap.
abstract: The robust control design problem for the levitation control of a nonlinear uncertain maglev system is considered. The uncertainty is (possibly) fast time-varying. The system has magnitude limitation on the airgap between the suspended chassis and the guideway in order to prevent undesirable contact. Furthermore, the (global) matching condition is not satisfied. After a three-step state transformation, a robust control scheme for the maglev vehicle is proposed, which is able to guarantee the uniform boundedness and uniform ultimate boundedness of the system, regardless of the uncertainty. The magnitude limitation of the airgap is guaranteed, regardless of the uncertainty.
authors.affiliation: The School of Automation Science and Electrical Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China; The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA. Electronic address: xujinquan@buaa.edu.cn.
authors.forename: Jinquan
authors.initials: J
authors.lastname: Xu
authors.affiliation: The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA. Electronic address: yehwa.chen@me.gatech.edu.
authors.forename: Ye-Hwa
authors.initials: YH
authors.lastname: Chen
authors.affiliation: The School of Automation Science and Electrical Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China. Electronic address: guohong@buaa.edu.cn.
authors.forename: Hong
authors.initials: H
authors.lastname: Guo
keywords: Magnetic levitation; Nonlinear systems and control; Uncertain systems and robust control