基于目标函数的冷连轧轧制力模型参数自适应

为提高轧制力模型的预报精度，提出了一种基于目标函数的轧制力模型参数寻优方法该方法通过建立轧制力模型参数自适应目标函数，以变形抗力和摩擦系数模型中的自适应系数作为寻优参数，采用Nelder-Mead单纯形算法对目标函数进行求解，从而获得满足轧制力精度的模型自适应系数本文提出的轧制力模型参数自适应方法已应用于某1700mm五机架冷连轧机组.现场应用表明:采用轧制力模型参数自适应后，轧制力模型计算值与实测值的均方差由不采用自适应的129%降至32%，证明该参数自适应方法能显著提高轧制力模型预报精度，满足在线控制要求.

Parameters Adaptation of the Rolling Force Model Based on the Objective Function in Tandem Cold Rolling

In order to improve the prediction precision of the rolling force model， a method for optimizing parameters of the rolling force model based on the objective function was put forward. Through establishing the model of rolling force parameter adaptive target function， the adaption coefficients of the deformation resistance and friction coefficient models were taken as the parameters to be optimized， and the Nelder Mead simplex algorithm was used to search the optimal solution of the objective function so that the adaptation coefficients were obtained which fulfilled the accuracy of the rolling force. The proposed parameter adaptation method of the rolling force modeling was applied to a 1700mm 5 stand tandem cold mill. Application results showed that the mean square deviation between the calculated rolling force and measured one was reduced from 129% to 32% after using the proposed parameter adaptation method， which showed that the method proposed obviously improved the accuracy of the rolling force model and met the requirement of online process control.