Abstract
In the transport system of a thin-steel-plate production line, there is a problem that the quality of the plate surface deteriorates over time because the plate is usually in contact with rollers. To solve this problem, electromagnetic levitation technologies have been studied. However, when a flexible thin steel plate with a thickness of less than 0.3 mm is to be levitated, levitation control becomes difficult because the thin plate undergoes increased flexure. We propose the levitation of an ultrathin steel plate that is bent to an extent that does not induce plastic deformation. It has been confirmed that vibrations are suppressed and levitation performance is improved. In this study, bending levitation experiments were carried out on the basis of the optimal control and sliding mode control theory using thin steel plate with a thickness of 0.24 mm to examine the levitation stability and to compare the levitation performance.
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