| 摘要 |
<p>PURPOSE:To automatically suppress the control unstable state, and to remarkably improve the controllability of a looper control system by multiplying a prescribed control gain of the looper control system by a ratio of the sum total of a reference angle deviation and the sum total of an actual result angle deviation, and correcting automatically the prescribed control gain. CONSTITUTION:With regard to each 1ooper 4, the reference angle deviation sum total li (value related to an i-th looper) being the sum total of a fluction portion from a target looper angle thetaoi of a looper angle thetai at the time of normal rolling (stable time of a looper control system) is derived and set in advance. In this case, the reference angle deviation sum total li is the sum total of looper angles detected at every prescribed sampling time t within a certain prescribed time, and the number of pieces of detecting angles is determined by T/ t. Its number of pieces is called the angle deviation sum total N number. In the course of real rolling, the angle of the looper 4 is always detected at every prescribed sampling time by a looper angle detector 7, and inputted to a control gain correcting device 9. In this control gain correcting device 9, from the sampled looper angle, a control gain initial value is corrected and an optimal control gain is calculated, and this control gain is outputted to a controller 8, and used instead of the prescribed control gain.</p> |
