| 摘要 |
PURPOSE:To stabilize reel tension and obtain high platethickness-controlling precision, by performing process for avoiding counting noise, and by performing differential arithmetic. CONSTITUTION:In a tension responding arithmetic unit 52, smoothing filters 527, 528, and a subtracter 529 are additionally arranged. By the smoothing filter 527, through the input of the rotational speed omega of a motor M detected by a rotational speed meter 51, counting noise is smoothing-processed, and an arithmetic unit omega' is produced. By the subtractor 529, a difference between this signal omega' and the original rotational speed omega is found, and with a multiplier 520, the difference is multiplied by the inverse number of a time constant, and the differential signal (domega/dt)' of the rotational speed omega is equivalently found. A difference between signal multiplied by the moment of inertia with a multiplier 522, and the signal TM' of generation torque TM smoothing-processed by the smoothing filter 528 is found by a subtracter 523, and the input to a subtractor 524 is provided as load torque TL'. |
