热轧带钢负荷分配目标厚度函数法

在分析了传统的解非线性方程组负荷分配方法缺陷的基础上提出目标厚度函数法.该方法首先建立总负荷与目标出口厚度的单调函数关系,而后给定目标厚度并对n个一维非线性方程求根得出各道次压下规程,避免了初始分配率限定问题,同时也对迭代过程中可能出现的轧制道次出口厚度大于入口厚度的异常情况做了处理.使用该方法并采用实际生产数据进行优化计算,结果表明该方法运算精确快捷,可以满足实时在线控制的要求.

Thickness Target Function Method for Load Distribution During Hot Strip Rolling

Analyzing the defects of conventional solution to the set of nonlinear equations of rolling load distribution,a new method named thickness target function is proposed,i.e.,a monotone function is derived between total load and target strip thickness at exit,and then the target thickness is given so as to solve n nonlinear equations to obtain all the pass reductions.Thus,the method can avoid the strict constraint on initial load distribution rate and deal properly with the possible abnormality that in the iterative process a work piece at exit is thicker than at entry when passing a gauge reduction during rolling.An optimization calculation was done by the method in combination with in-situ data,and the results showed that the method is accurate and rapid in operation and meets the requirement of on-line real-time control.