Operating method for a production line with prediction of the command speed

摘要

Before a first strip point is fed into a production line, an actual energy content at a location in front of the production line and a setpoint energy content at a location behind the production line are received for a first strip point, second strip point, and third strip point. The third strip point, followed by the first strip point, followed by the second strip point, are fed into the production line. A command variable for the first strip point and second strip point(s) is determined prior to feeding in the first strip point. Each command variable is determined based on (a) the actual value and the setpoint value of the strip point currently entering the production line, and (b) the actual value and the setpoint value of at least one strip point having already entered.

主权项

1. An operating method for a production line for rolling a strip, the method comprising:
at a time point before a first strip point of the strip is fed into the production line, a control computer of the production line receiving an actual value and a setpoint value for each of the first strip point, a number of second strip points, and a number of third strip points of the strip, wherein for each first, second, and third strip point, the respective actual value describes energy content of that strip point either by temperature or enthalpy, and the respective setpoint value is a setpoint for the energy content of that strip point, wherein for each first, second, and third strip point, the respective actual value relates to a location in front of the production line and the respective setpoint value relates to a location behind the production line, feeding the third strip points into the production line, followed by the first strip point, followed by the second strip points, prior to feeding the first strip point into the production line, the control computer determining a command variable for each of the first strip point and at least a subset of the second strip points based on a determining rule specific to the respective strip point, wherein each respective command variable is characteristic of a command speed at which the control computer operates the production line at a time when the respective strip point is fed into the production line, and the control computer determining the respective command speed for each respective strip point based on the command variable determined for that strip point, and the control computer operating the production line at the respective command speed at the time when the respective strip point is fed into the production line, wherein the determining rule for determining each respective command variable is determined based at least on (a) the actual value and the setpoint value of the respective strip point currently entering the production line, and (b) the actual value and the setpoint value of at least one strip point that has already entered the production line, wherein for each of at least a subset of the strip points, the control computer:
determines a respective expected value of the temperature or enthalpy of an expected energy content that is expected for the respective strip point, at a location behind the production line to which the currently corresponding setpoint value relates, as a result of the command speeds at which the control computer operates the production line during the entire passage of the respective strip point through the production line,receives, after the passage of the respective strip point through the production line, a measured value of the temperature or enthalpy of an actual energy content of the respective strip point at the location behind the production line to which the corresponding setpoint value relates, andautomatically corrects the command variable determined for the respective strip point based on a comparison between the expected energy content and the actual energy contentwherein based on the comparison, the control computer automatically corrects only those command variables that were determined for the strip points having a minimal distance from the entrance to the production line at the time point of the correction.