PID control of Maglev Guiding System for Linear Elevator

In this paper, two different PID control methods are described to control of Maglev Guiding System for Linear Elevator. The linear elevator driven by permanent magnet linear synchronous motor (PMLSM) use the method to adopt the magnetic guidance system to control the PMLSM gap which changes frequently and can impact the vertical thrust and control the level vibration and noise in the process of start, operation, and stop to make passenger feel comfortable. The first PID control method is based on feedback linearization. In this method, single Maglev guiding systems are controlled to maintain the air gap of linear motor in the reference value independently. To achieve a more practical control method and better operation of maglev guiding system, this method is corrected and a simultaneous control method of two counterpart Maglev systems is proposed. MATLAB modeling of these systems are used in this paper. Simulation results show that the second method has a better performance.