Device for regulating the thickness of rolling stock

US5761066A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Ulrich Lettau · Erlangen, DE
• Matthias Mueller · Harsefeld, DE
• Siegbert Steidl · Herzogenaurach, DE
• Dietrich Wohld · Rauschenberg, DE

Key dates

• Filing date: Feb 20, 1996
• Grant date: Jun 2, 1998
• Expiry date: Feb 20, 2016

Classification

• Technology area (CPC G): Physics
• CPC primary: G05B13/027
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A device is provided for regulating the thickness of rolling stock in a roller stand. The device includes a control device that controls the roller adjustment of the roller stand as a function of the deviation between a reference thickness value (h*) and an estimated value (h') for the thickness of the rolling stock exiting from the roller stand; a model simulating the rolling process in the roller stand, the model calculating the estimated value (h') on the basis of roller technology parameters and measured values; a thickness measurement device that measures the thickness of the rolling stock after its exit from the roller stand with a measurement delay (T.sub.L) providing a measured thickness value (h.sub.L); a delay device for delaying the estimated value (h') determined by the model by at least approximately the amount of the measurement delay (T.sub.L); a correction device generating a correction value (k) as a function of a deviation (.DELTA.h.sub.L) between the measured thickness value (h.sub.L) and a delayed estimated value (h'.sub.L), the correction value (k) correcting the estimated value (h') provided by the model; a controllable switching device enabling the generation…