Applied Adaptive Controller Design for Vibration Suppression in Electromagnetic Systems

摘要

In engineering tests, the vehicle-track coupledvibration is very easy to occur on the elastic supportbeams for a magnetic levitation (maglev) system. Thefundamental waves, higher order harmonics, and othercomponents related to the mode of track vibrations areoften observed in the gap, acceleration and currentsensors. This paper aims to design an adaptive filter tosuppress these vibration components and improve theride comfort for the passengers. Firstly, an adaptive selfturningfilter is designed to filter out wideband signalsand noise from the original signals, and enhance thestrength of the fundamental wave and the harmoniccomponents related to the mode of track vibration.Secondly, a narrow-band bandpass filter is presented toextract these enhanced periodical signals related to thetrack mode, and then the enhanced signals are configuredas the reference inputs of the subsequent adaptive noisecanceller. Thirdly, the adaptive noise canceller filtersout periodical vibration components related to the trackmode. Finally, the designed digital adaptive filter isapplied to a real maglev system and suppresses coupledvibration on the elastic support beams effectively.