论文部分内容阅读
本文讨论了两机架冷轧机输出产品厚度的调节问题。当输入材料的厚度发生突变和两机架的轧辊速度发生变化而引起的滚动摩擦系数改变时,所设计的调节器对闭环系统进行调节以对抗上述阶跃干扰,使其工作在额定工作点。系统的数学模型是一个互为影响的含有延时的多变量系统模型。本文通过一组辅助状态变量将系统模型离散化后应用最佳线性二次型控制理论结合数字模拟导出了最佳控制规律,获得了良好的动态性能,同时对稳态误差反应迟缓。
This article discusses the regulation of the output thickness of two-stand cold-rolling mills. When the thickness of the input material is abruptly changed and the rolling friction coefficient caused by the change of the roll speed of the two stands is changed, the designed adjuster adjusts the closed-loop system against the step interference to work at the rated working point. The mathematical model of the system is an interactive multivariable system model with delay. In this paper, a set of auxiliary state variables are used to discretize the system model and the best linear control theory and digital simulation are used to derive the optimal control law. The good dynamic performance is obtained while the steady-state error is slow to respond.