Noncontact guide system for traveling continuous thin steel plate: fundamental consideration on control performance by positioning control in edge direction

抄録

Currently, thin steel plates are widely used in industrial products, including the automobile industry. In the factory, the continuous thin steel plates are subjected to iron, and steel processes is supported by a series of rollers during processes such as plating and rolling. However, because the rollers contact with the steel plates, the problem of surface quality deterioration arises. To solve this problem, we developed a non-contact guide system for parts of the steel plate at which its traveling direction changes in high-speed traveling by applying an electromagnetic force from the direction of the edge of the thin steel plate, and experimentally examined the effectiveness of the system. In addition, structural analysis was performed by the finite element method, and a permanent magnet was placed in the antinode of the eigenmode. It was experimentally confirmed that vibration can be suppressed by disposing of permanent magnets. In this study, we examined experimentally the tendency of vibration suppression and control performance by changing the feedback gain. From the experimental results, the vibration can be reduced in the active direction by increasing the velocity gain, which is a control parameter. However, vibration increased in the non-controlled direction. From this result, it was found that the control direction and the non-controlled direction showed opposite tendencies.