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过去采用的板形控制法,是从检测装置所测得的板形图象信号的全信息中,仅以几点信息作为状态变数进行板形控制的。在这种情况下,可控制的变形范围只局限于以板带中心线为中心而对称分布的简单的形状变化,或只与轧辊弯曲有关的变形,因此,得不到良好的控制性能;另外,在调整对称形状不良上所用的操作量中,采用了调整压下位置,这就使得板形控制与板厚控制发生相互干扰,从而变成了与板厚控制相结合的板形控制,或者由于采取了防止板厚控制干扰措施,而使控制系统变得复杂化了。
In the past, the plate-shaped control method adopted is that the plate-shaped control is carried out using only a few points of information as the state variables in the entire information of the plate-shaped image signal measured by the detecting means. In this case, the controllable deformation range is limited to a simple shape change which is symmetrical about the center line of the strip or only to the deformation of the roll, so that good control performance can not be obtained. In addition, , The adjustment of the press-down position is used in the adjustment of the amount of operation used for the defective shape of the symmetry. This causes the plate-shaped control and the plate thickness control to interfere with each other to become the plate-shaped control combined with the plate thickness control or The control system has been complicated by measures taken to prevent plate thickness control disturbances.