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基于高次勒让德正交多项式和调控功效函数,提出了降维功效调控模型及两级调控模型。首先,利用连续可导的高次曲线准确描述局部板形信息,同时降低影响系数矩阵的维数和功效函数的计算量,利用传统板形调控手段(倾辊、弯辊、横移)同步消除典型板形缺陷;然后,利用精细分段冷却实施剩余板形偏差的二级调控,改善局部浪形缺陷,提高成批钢卷的生产稳定性和板形质量。实例表明,当阶数为带钢覆盖检测通道数量的一半以上时,拟合曲线已包含所有的局部板形信息;对于相对较典型的板形问题(50 I左右),一级调控后剩余板形偏差在15 I以内,二级调控后剩余板形偏差在8 I以内,综合调控效果比较理想。
Based on the high order Lederhold orthogonal polynomials and the regulation and control efficiency function, a model for the dimensionality reduction and the two-level regulation model are proposed. First of all, the information of local plate shape is accurately described by continuously derivable high-order curves, and the dimension of the coefficient matrix and the calculation of the efficiency function are also reduced. Simultaneously, the traditional plateform control method (roll, bend and traverse) And then the fine secondary cooling is used to implement the secondary control of the remaining plate deviation to improve the local corrugated defects and improve the production stability and the plate quality of the batch coils. The examples show that when the order is more than half of the number of detection channels covered by steel strip, the fitted curve already contains all the local plate-shaped information. For the relatively typical plate-shaped problem (about 50 I), the first- The shape deviation is within 15 I, the remaining shape deviation of the secondary control is within 8 I, and the comprehensive control effect is ideal.