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Robust levitation control for maglev systems with guaranteed bounded airgap.

Jinquan Xu1, Ye-Hwa Chen2, Hong Guo3

  • 1The 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.

ISA Transactions
|November 4, 2015
PubMed
Summary

This study presents a robust control scheme for nonlinear uncertain magnetic levitation (maglev) systems. The proposed method ensures system stability and airgap limitations despite fast time-varying uncertainties.

Keywords:
Magnetic levitationNonlinear systems and controlUncertain systems and robust control

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Area of Science:

  • Control Systems Engineering
  • Nonlinear Dynamics
  • Robotics

Background:

  • Magnetic levitation (maglev) systems require precise control for stable operation.
  • Nonlinear dynamics and time-varying uncertainties pose significant challenges in maglev control design.
  • Existing control methods may not adequately address uncertainties and system constraints.

Purpose of the Study:

  • To develop a robust control strategy for a nonlinear uncertain maglev system.
  • To ensure uniform boundedness and uniform ultimate boundedness of the maglev system states.
  • To guarantee the airgap magnitude limitation, preventing undesirable contact.

Main Methods:

  • A three-step state transformation technique was employed.
  • A novel robust control scheme was designed for the maglev vehicle.
  • The control design addresses systems where the global matching condition is not satisfied.

Main Results:

  • The proposed control scheme guarantees uniform boundedness and uniform ultimate boundedness of the system states.
  • The airgap magnitude limitation is successfully maintained under uncertainty.
  • The control strategy is effective even with fast time-varying uncertainties.

Conclusions:

  • The developed robust control scheme effectively manages nonlinear uncertain maglev systems.
  • The method ensures stable levitation and adherence to operational constraints.
  • This approach enhances the reliability and safety of maglev transportation systems.