| 摘要 |
PURPOSE:To improve the control accuracy by providing a tension detector and a tension correcting device, and also a rough elongation percentage operator for calculating an elongation percentage by a short sample length and a rough elongation percentage controller which can change the gain, with respect to a steel plate. CONSTITUTION:The titled device is provided with a tension detector 18 for monitoring a tension of a steel plate P, and also a tension correcting device 23 for giving a correction to a speed command value Ve of a bridle roll 2. Also, said device is provided with a rough elongation percentage operator 21 for executing an operation by a short sample length, and a rough elongation percentage controller 22 which can change the gain together with a speed, with respect to a precise elongation percentage operator 19 of a conventional function. The rough elongation percentage operator 21 calculates an elongation percentage by a sample length of 1/N of the operator 19, and also outputs a mean value of N times in the past. The tension correcting device 23 and the rough elongation percentage controller 22 both have a function for changing the gain with respect to a speed, therefore, even in case of a line of a low speed, the accuracy for controlling the elongation percentage can be improved. |
