Nonlinear disturbance rejection for magnetic levitation systems

Abstract

In this paper, a position regulation contml rtmtegy is developed for (L magnetic levitation system opemting in the presence of a bounded, nonlinear, periodic disturbance. The pmposed contmller utilizes a sotumted control fone input in conjunction k6th D learning based dbturbonce mtimntor to 's$"-totically regulate the target mom to D desimd set point position despite the oetuotor's unidirectional limitation of ezerting only an attmctiw fome on the target moss (i.e., the contml input a n only generate on ottmctiue fone while the earth's gmvitotionol field b utilized to pmdtrce the reptrlsive action). In addition, the contml development on$ re&w the disturbonce input to be bounded and penodic in notum. Simulation results ore included to illustrate the perfomonce of the contml stmtegy.

Disturbance attenuation in a magnetic levitation system with acceleration feedback

“…Both simulation and experiments indicated that the dynamic stiffness of their system was increased. Fang, Feemster and Dawson [2] reported a position regulation control strategy developed for a magnetic levitation system operating in the presence of a bounded, nonlinear, periodic disturbance. They included simulation results, but no experimental data was reported.…”