Electromagnetic vibration suppression device and electromagnetic vibration suppression program

Patent metadata

Field	Value
Publication number	US-9371884-B2
Application number	US-201214009010-A
Country	US
Kind code	B2
Filing date	Mar 27, 2012
Priority date	Mar 30, 2011
Publication date	Jun 21, 2016
Grant date	Jun 21, 2016

Abstract

The electromagnetic vibration suppression device includes a plurality of electromagnet pairs arranged in the width direction of a steel plate and which suppresses vibration of the steel plate running between electromagnets in each electromagnet pair using a control unit. The pseudo displacement calculation means calculates a pseudo displacement amount for the steel plate on the basis of the switching between ON and OFF of a sensor attached to the electromagnet pairs. The pseudo edge position calculation means calculates a pseudo edge position for the steel plate on the basis of the pseudo displacement amount. The current amount control means individually controls the amount of current that flows to the electromagnets on the basis of the pseudo edge position.

First claim

The invention claimed is:

1. An electromagnetic vibration suppression device for suppressing vibration of a running steel plate, comprising:
a plurality of electromagnet pairs arranged in a width direction of the steel plate, each electromagnet pair including a combination of electromagnet oppositely arranged to each other in a thickness direction of the steel plate running in predetermined direction; and
a control unit configured to control electric currents fed to the respective electromagnets, the control unit suppressing vibration of the steel plate running between the electromagnets of the respective electromagnet pairs, wherein
a plurality of sensor pairs, each sensor pair detecting presence of the steel plate between the electromagnet pair, and each sensor arranged on each of electromagnets to face the steel plate excluding the electromagnet arranged in the width direction center position or near, and each sensor pair arranged to an opposing location interpose the steel plate between two sensors in pair, and
the control unit includes pseudo displacement amount calculation means, pseudo edge position calculation means, and current amount control means,
the pseudo displacement calculation means calculating a pseudo displacement amount α′ of the steel plate, wherein the value α′ is calculated as a difference between a provisional meandering width and a value of ½ W, in which W is a width dimension of the steel plate, wherein the provisional meandering width is a distance from a steel plate center position, which is a width direction center position of the steel plate in a regular state in which the steel plate does not meander in the width direction, to a switched sensor reference position based on at least one of a position of a sensor closest to the width direction center portion of the electromagnet pair region among sensors switched from an ON state in which presence of the steel plate is detected between the electromagnets of the electromagnet pairs to an OFF state in which the presence of the steel plate is not detected between the electromagnets of the electromagnet pairs and a position of a sensor most distant from the width direction center portion of the electromagnet pair region among sensors switched from the OFF state to the ON state,
the pseudo edge position calculation means calculating a pseudo edge position of the steel plate by using a formula of ½ W±α′, wherein the pseudo edge position is an approximative position of an actual edge position of the steel plate, and
the current amount control means individually controlling amounts of electric currents fed to the electromagnets on the basis of the pseudo edge position of the steel plate calculated by the pseudo edge position calculation means,
among said plurality of electromagnet pairs, the current amount control means detects an edge-position detecting electromagnet pair in which the pseudo edge position is disposed therebetween, the pseudo edge position obtained by the formula above in the pseudo edge position calculation means, and then, a driving condition is made on the electromagnets making up the electromagnet pairs located at a side closer to a widthwise center than the edge-position detecting electromagnet pair, while a non-driving condition is made on other electromagnets located at a side closer to the widthwise end than the edge-position detecting electromagnet pair.

2. The electromagnetic vibration suppression device according to claim 1 , wherein the current amount control means outputs a current control signal for switching the respective electromagnets to an excited state or an unexcited state.

3. The electromagnetic vibration suppression device according to claim 2 , wherein the current amount control means outputs a current control signal for switching, among the respective electromagnets, the electromagnet present further on a width direction center side of the steel plate than the pseudo edge position of the steel plate calculated by the pseudo edge position calculation means to the excited state and switching the other electromagnets to the unexcited state.

4. The electromagnetic vibration suppression device according to claim 3 , wherein the current control means specifies the electromagnet pair in which the pseudo edge position of the steel plate calculated by the pseudo edge position calculation means is present between the electromagnets and, in the specified electromagnet pair, when it is discriminated that the pseudo edge position is present further on a width direction end side of the electromagnet pair region where the plurality of electromagnet pairs are arranged than a predetermined value, which is set with a center in a width direction center of the electromagnets configuring the electromagnet pairs, switching the electromagnets configuring the specified electromagnet pair to the excited state and, when it is discriminated that the pseudo edge position is present further on the width direction center side of the electromagnet pair region than the predetermined value, switching the electromagnets configuring the specified electromagnet pair to the unexcited state.

5. A non-transitory computer readable medium storing computer program to be applied to the electromagnetic vibration suppression device according to claim 1 , the program comprising:
a pseudo displacement amount calculating step, a pseudo edge position calculating step, and a current amount control step, wherein
the pseudo displacement amount calculating step calculating, a pseudo displacement amount α′ of a steel plate, wherein the value α′ is calculated as a difference between a provisional meandering width and a value of ½ W, in which W is a width dimension of the steel plate, wherein the provisional meandering width is a distance from a steel plate center position, which is a width direction center position of the steel plate in a regular state in which the steel plate does not meander in the width direction, to a switched sensor reference position based on at least one of a position of a sensor closest to a width direction center portion of an electromagnet pair region among sensors switched from an ON state to an OFF state and a position of a sensor most distant from the width direction center portion of the electromagnet pair region among sensors switched from the OFF state to the ON state,
the pseudo edge position calculating step calculating a pseudo edge position of the steel plate by using a formula of ½ W±α′, wherein the pseudo edge position is an approximative position of an actual edge position of the steel plate, and
the current amount controlling step of individually controlling amounts of electric currents fed to the electromagnets on the basis of the pseudo edge position of the steel plate calculated in the pseudo edge position calculating step,
among said plurality of electromagnet pairs, the current amount control means detects an edge-position detecting electromagnet pair in which the pseudo edge position is disposed therebetween, the pseudo edge position obtained by the formula above in the pseudo edge position calculation means, and then, a driving condition is made on the electromagnets making up the electromagnet pairs located at a side closer to a widthwise center than the edge-position detecting electromagnet pair, while a non-driving condition is made on other electromagnets located at a side closer to the widthwise end than the edge-position detecting electromagnet pair.

6. An electromagnetic vibration suppression device for suppressing vibration of a running steel plate, comprising:
a plurality of electromagnet pairs arranged in a width direction of the steel plate, each electromagnet pair including a combination of electromagnet oppositely arranged to each other in a thickness direction of the steel plate running

Assignees

• Ohara Hisanori
• Matsuda Kazuhisa
• Sinfonia Technology Co Ltd

Inventors

• Ohara Hisanori
• Matsuda Kazuhisa

Classifications

• F16F15/03 Primary

  using {magnetic or} electromagnetic means (F16F9/53, {F16F15/005} take precedence) · CPC title

• G05D19/02

  characterised by the use of electric means · CPC title

• C23C2/40 Primary

  Plates; Strips · CPC title

• C23C2/003

  Apparatus · CPC title

• C23C2/5245

  for reducing vibrations of the substrate · CPC title