Abstract
Recently, demand in improving of quality for thin steel plates used in various industrial products is increasing. We have proposed a magnetic levitation control system and confirmed its realization by means of a digital control experiment. However, the use of a limited number of electromagnets cannot suppress static deflection and high-order-mode elastic vibration, which are characteristics of a flexible magnetic material. To solve this problem, we have proposed a hybrid levitation control system for thin steel plate using the magnetic force generated by permanent magnets, which have no operational costs. In this study, we attempt to determine the optimal placement and number of permanent magnets to reduce the deflection of a thin steel plate under considering interacted magnetic field of permanent magnets.
