Bending Magnetic-Levitation Control for Flexible Steel Plate (Fundamental Consideration on Disturbance Cancellation Control under Disturbance Conditions)

In a steel plate factory, conveyance is performed while the steel plate is in contact with a roller, and the quality deterioration of the steel plate surface is a problem. Therefore, to perform noncontact conveyance of a thin steel plate using the attraction force of electromagnets, research was conducted on the levitation stability of thin steel plates. Previously, a bending magnetic-levitation system capable of levitating using a bending thin steel plate was proposed. It was confirmed that the levitating stability is improved by bending levitation. In this report, a bending magnetic-levitation system was constructed that can input disturbances to simulate an actual usage environment, and magnetic-levitation experiments on a thin steel plate were conducted using disturbance cancellation control. The levitation target was a rectangular galvanized steel sheet (SS400) with a length of 800 mm, a width of 600 mm, and a thickness of 0.19 mm.