Abstract
The commercial rolling process used in the steel industry to manufacture thin steel sheets tends to cause plate vibrations that lower the quality of the surface finish. This article introduces a noncontact method of active vibration control for reducing the flexural vibrations of a thin steel sheet. The proposed electromagnetic method of control has been implemented in a simple experimental setup where the signal from a motion sensor regulates the attractive force of the magnets that produce a damping force on the steel sheet.
Highlights
Thin steel sheet is widely used in automobile structures, electrical appliances, and so on
Recent market demand for thinner sheets has unveiled the problem of bending vibrations in the rolling process
This study introduces a noncontact method of active vibration control using electromagnets
Summary
Thin steel sheet is widely used in automobile structures, electrical appliances, and so on. Recent market demand for thinner sheets has unveiled the problem of bending vibrations in the rolling process. These plate vibrations deteriorate surface finish quality and should be controlled without introducing surface contacts. The active control technique described is applied to suppress vibrations in the traveling steel sheet. In a real rolling process, a large number of magnetic dampers are required. This does not make the solution economically unacceptable because the high-output plant itself is expensive. It is preferable to reduce the number of required magnetic dampers as much as possible This consideration led the authors to try modal control to design the control system.
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