Modeling, analysis and experimental evaluation of boundary threshold limits for Maglev system

Magnetic Levitation system is an unstable and sensitive system. High precision force balance condition is required to levitate an object in the air. Accurate mathematical modeling, transfer function derivation, linearization and appropriate choice of the controller parameters play an instrumental role in the successful levitation of the object. Selection of the boundary limits for parameter variation of a controller is difficult as linearization conditions impose limitations on the upper and lower bounds. Pole Placement technique has been found to be effective in calculating the parameters of the controller as it takes the closed loop system dynamics into account. In this paper, the poles have been placed at a number of different locations to experimentally analyze the responses to find the threshold limits for successful levitation of the ball in the real time environment.