Dynamic surface control for a voltage-controlled magnetic levitation system

This paper considers the position tracking problem of a magnetic levitation system in the presence of modelling errors due to uncertainties of physical parameters. The recently developed dynamic surface control is modified and applied to the system under study, to overcome the problem of "explosion of terms" associated with the backstepping design pro: procedure. Input-to-state stable property of the control system is analyzed, and experiment results are included to show the excellent position tracking performance.