Improvement of Active Magnetic Bearing system using Jerk Feedback Controller for an Elastic Rotor

This paper presents an integrated control system performing levitation and vibration suppression for a magnetic bearing (AMB) supporting elastic rotor. Stable levitation of the elastic rotor is achieved by using PD controller. However, there is a problem with the 2nd mode of the elastic rotor appeared notably. We are aiming to introduce jerk feedback control term for this problem. In previous studies, jerk feedback controller is applied that posses difficulty in tuning. In this study, location of AMBs and the shape of the rotor are modified to solve problem as controllability and observability. Moreover, we introduce acceleration feedback controller coupling to PD controller and phase lead compensator in series. The effect of presented controller is verified by experiment.