Self-Sensing Active Suppression of Vibration of Flexible Steel Sheet

[+] Author and Article Information
Ken-ichi Matsuda, Masahiro Yoshihashi, Yohji Okada

School of Engineering, Ibaraki University, 4-12-1, Nakanarusawa, Hitachi, Japan 316

Andy C. C. Tan

School of Mechanical and Manufacturing Engineering, Queensland University of Technology, Gardens Point, 2 George St., GPO Box 2343, Brisbane Q4001, Australia

J. Vib. Acoust 118(3), 469-473 (Jul 01, 1996) (5 pages) doi:10.1115/1.2888207 History: Received February 01, 1995; Revised April 01, 1995; Online February 26, 2008


In rolling processes, flexible steel sheet is supported by rollers and is bound to produce structural vibration. This vibration can cause severe problems to surface finish and affect the quality of the product. To overcome these problems, active vibration control has been proposed. This usually requires both sensors and actuators. The location of sensors and actuators plays a very important role in active vibration control. Moreover, a reliable sensor can be very expensive. This paper proposes a self-sensing vibration control using a push-pull type electromagnet to control the transverse vibration of the steel plate. The construction of the electromagnet has two types of coils, namely the bias coil and the control coil. Vibration displacement is estimated by using the mutual inductance change between the bias and the control coils. The estimated signal is proportional to the gap displacement. The proportional and derivative signals are fed back to the control coil to reduce the transverse vibration of the steel sheet. The proposed method is applied to a simple test rig to confirm the capability of the device. The results obtained are showing high possibility for reducing steel sheet vibration.

Copyright © 1996 by The American Society of Mechanical Engineers
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