Multi-Input Multi-Output Root Loci Analysis of EMS Maglev-Girder Interaction System

A Maglev-girder interaction system experiences a variation of its dynamics as the vehicle’s position varies over the girder’s span at different speeds. This paper investigates this variation using Multi-input Multi-output root locus criteria. Thus, the change of the system’s poles and zeros is visualized with the change of the vehicle’s position, while the speed of the vehicle represents the rate of these changes. These Multi-input Multi-output root locus criteria are used to study and design both centralized and de-centralized controllers for Maglev system.