The application discloses a tension system optimization method for suppressing vibration of a cold tandem rolling mill. The method aims to suppress vibration occurring in a high-speed rolling process of a cold tandem rolling mill, and provides a rolling machine vibration determination index coefficient for effectively determining whether vibration occurs in a rolling machine. The method employs a target optimization function F(X) such that a mean square error between an optimal value ψ.sub.0i of the rolling machine vibration determination index and a vibration determination index ψ.sub.i of each machine frame acquired in an actual rolling process is at a minimum, and such that a maximum value of the rolling machine vibration determination index coefficient of each individual machine frame is also at a minimum, employs a constraint in which an upper threshold ψ.sub.i.sup.+ of the vibration determination index is acquired during a rolling process in an over-lubricated state in which a neutral angle γ.sub.i coincides with a bite angle α.sub.i and a constraint in which a lower threshold ψ.sub.i.sup.− of the vibration determination index is acquired during a rolling process in an under-lubricated state in which the neutral angle γ.sub.i is half the bite angle α.sub.i, thereby ultimately optimizing a tension system of a rolling process of a cold tandem rolling mill.

The application discloses a tension system optimization method for suppressing vibration of a cold tandem rolling mill. The method aims to suppress vibration occurring in a high-speed rolling process of a cold tandem rolling mill, and provides a rolling machine vibration determination index coefficient for effectively determining whether vibration occurs in a rolling machine. The method employs a target optimization function F(X) such that a mean square error between an optimal value ψ.sub.0i of the rolling machine vibration determination index and a vibration determination index ψ.sub.i of each machine frame acquired in an actual rolling process is at a minimum, and such that a maximum value of the rolling machine vibration determination index coefficient of each individual machine frame is also at a minimum, employs a constraint in which an upper threshold ψ.sub.i.sup.+ of the vibration determination index is acquired during a rolling process in an over-lubricated state in which a neutral angle γ.sub.i coincides with a bite angle α.sub.i and a constraint in which a lower threshold ψ.sub.i.sup.− of the vibration determination index is acquired during a rolling process in an under-lubricated state in which the neutral angle γ.sub.i is half the bite angle α.sub.i, thereby ultimately optimizing a tension system of a rolling process of a cold tandem rolling mill.

Before the rolling of a metal strip on a finishing train, the actual width and actual temperature of portions of the metal strip are respectively detected. The portions of the metal strip are tracked while they run through the finishing train. The rolling stands are respectively assigned width controlling devices which determine the setpoint width and the actual width after the rolling in the assigned rolling stand, and a downstream additional setpoint value, by which the desired tension downstream of the assigned rolling stand is corrected in order to bring the actual width closer to the setpoint width. The downstream additional setpoint value is both taken into account in the determination of the actual width and fed to a tension controller, which sets an actual tension, in the metal strip downstream of the assigned rolling stand, in accordance with the corrected setpoint tension. Determining the downstream additional setpoint value by the difference between the setpoint width and the actual width of a portion of the metal strip.

A rolling controller executes speed and tension control, and roll gap and plate thickness control when rolling speed is less than a boundary value, while executing roll gap and plate tension control, and speed and plate thickness control when the rolling speed is equal to or greater than the boundary value. If the rolling speed rises across the boundary value, the rolling controller sets the rolling speed to zero such that a speed correction amount in the speed and tension control before the transboundary is not reflected to a calculation executed in the speed control amount of the rolling speed after the transboundary.

The application discloses a tension system optimization method for suppressing vibration of a cold tandem rolling mill. The method aims to suppress vibration occurring in a high-speed rolling process of a cold tandem rolling mill, and provides a rolling machine vibration determination index coefficient for effectively determining whether vibration occurs in a rolling machine. The method employs a target optimization function F(X) such that a mean square error between an optimal value ψ.sub.0i of the rolling machine vibration determination index and a vibration determination index ψ.sub.i of each machine frame acquired in an actual rolling process is at a minimum, and such that a maximum value of the rolling machine vibration determination index coefficient of each individual machine frame is also at a minimum, employs a constraint in which an upper threshold ψ.sub.i.sup.+ of the vibration determination index is acquired during a rolling process in an over-lubricated state in which a neutral angle γ.sub.i coincides with a bite angle α.sub.i and a constraint in which a lower threshold ψ.sub.i.sup.− of the vibration determination index is acquired during a rolling process in an under-lubricated state in which the neutral angle γ.sub.i is half the bite angle α.sub.i, thereby ultimately optimizing a tension system of a rolling process of a cold tandem rolling mill.

The application discloses a tension system optimization method for suppressing vibration of a cold tandem rolling mill. The method aims to suppress vibration occurring in a high-speed rolling process of a cold tandem rolling mill, and provides a rolling machine vibration determination index coefficient for effectively determining whether vibration occurs in a rolling machine. The method employs a target optimization function F(X) such that a mean square error between an optimal value ψ.sub.0i of the rolling machine vibration determination index and a vibration determination index ψ.sub.i of each machine frame acquired in an actual rolling process is at a minimum, and such that a maximum value of the rolling machine vibration determination index coefficient of each individual machine frame is also at a minimum, employs a constraint in which an upper threshold ψ.sub.i.sup.+ of the vibration determination index is acquired during a rolling process in an over-lubricated state in which a neutral angle γ.sub.i coincides with a bite angle α.sub.i and a constraint in which a lower threshold ψ.sub.i.sup.− of the vibration determination index is acquired during a rolling process in an under-lubricated state in which the neutral angle γ.sub.i is half the bite angle α.sub.i, thereby ultimately optimizing a tension system of a rolling process of a cold tandem rolling mill.

A rolling control device (10) updates a preset load value P.sub.set based on operation actual results at timings t.sub.a to t.sub.b. The rolling control device (10) derives a plasticity coefficient Q.sub.chk based on operation actual results at timings t.sub.b to t.sub.c. When the determining that it is necessary to re-update the updated preset load value P.sub.set based on the plasticity coefficient Q.sub.chk, the rolling control device (10) updates the preset load value P.sub.set again based on the operation actual results at the timings t.sub.b to t.sub.c.

A rolling control device (10) updates a preset load value P.sub.set based on operation actual results at timings t.sub.a to t.sub.b. The rolling control device (10) derives a plasticity coefficient Q.sub.chk based on operation actual results at timings t.sub.b to t.sub.c. When the determining that it is necessary to re-update the updated preset load value P.sub.set based on the plasticity coefficient Q.sub.chk, the rolling control device (10) updates the preset load value P.sub.set again based on the operation actual results at the timings t.sub.b to t.sub.c.

An object of the invention is to provide an abnormality detection device that can detect a processing abnormality of various types of software. The abnormality detection device according to the invention divides an output data series which is output by software into one or more clusters, determines that the output data included in any cluster is normal, and determines that the output data not included in any cluster is abnormal.

An object of the invention is to provide an abnormality detection device that can detect a processing abnormality of various types of software. The abnormality detection device according to the invention divides an output data series which is output by software into one or more clusters, determines that the output data included in any cluster is normal, and determines that the output data not included in any cluster is abnormal.