变摩擦力下板带轧机垂扭耦合振动控制技术

Control Technology of Vertical and Torsion Coupling Vibration of Strip Mill under Variable Friction

摘要:

当前对板带轧机垂扭耦合振动的控制过程未考虑变摩擦力的影响，无法对振动特性进行准确分析，导致控制效果不理想。提出一种变摩擦力下基于振动摩擦模型的板带轧机垂扭耦合振动控制技术。将垂扭耦合振动参数作为输入向量，理想状态下变摩擦力作为输出向量，确定垂扭耦合振动参数。采用遗传算法对已确定的最优垂扭耦合振动参数进行辨识，构建振动摩擦模型，完成对垂扭耦合振动特性的准确分析，解决控制过程中的变摩擦力影响问题。利用振动摩擦模型对系统位移响应和频域响应振动特性进行控制，实现板带轧机垂扭耦合振动的控制。与传统控制技术进行对比，得出实验结果，所提控制技术控制精度可达98%，能够减小控制过程的变摩擦影响，可对振动特性进行准确地准确分析，大大提高了控制精度。

Abstract:

At present, the control process of the vertical and reverse coupled vibration of the strip mill does not consider the influence of the variable friction force, and the vibration characteristics cannot be accurately analyzed, resulting in unsatisfactory control effect. A vertical and vibration coupled vibration control technology for strip mill based on vibration friction model is proposed. The vertical-torsional coupled vibration parameter is taken as the input vector, and the frictional force is used as the output vector under ideal conditions to determine the vertical-torsional coupled vibration parameters. The genetic algorithm is used to identify the optimal parameters of the coupled vibration and vibration, and the vibration friction model is constructed to accurately analyze the coupled vibration characteristics of the vertical and torsion, and to solve the problem of variable friction in the control process. The vibration and friction model is used to control the system displacement response and the frequency domain response vibration characteristics to realize the control of the vertical and reverse coupled vibration of the strip mill. Compared with the traditional control technology, the experimental results are obtained. The control precision of the proposed control technology can reach 98%, which can reduce the variable friction effect of the control process. It can accurately and accurately analyze the vibration characteristics and greatly improve the control precision.