Magnetic levitation control of thin steel plate with reduced number of gap sensors using real-time finite element vibration analysis

Contact-less magnetic levitation system is required for the transportation of the thin steel plate. When the thin steel plate is levitated by the plural electromagnets, there are interactions of supporting forces as the action points and the consideration of the dynamic vibration is therefore necessary. This paper proposes the magnetic levitation control of thin steel plates using the real-time finite element analysis of the vibration. This system aims at the stable levitation by presuming the vibration of the plate and observing the force of the electromagnet. At the time of the levitation control the thin steel plate by the plural electromagnets, it is necessary to combine the gap sensor and the electromagnet. The proposal system presumes the displacement of the other point. Therefore, this system can omit the gap sensor on other point.