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一、连轧机动态特性 与动态数学模型 1.连轧机的动态特性 图1是机架驱动马达在阶跃给定下的过渡过程曲线,这个过渡过程也称动态过程,需用微分方程或传递函数来描述。再如图2,在辊缝阶跃给定(SR)作用下,压力P随之发生过渡过程,机架出口厚度h在经过小的迟延后(X射线测厚仪与辊缝之间的距离造成的)也发生相应的变化过程。这都是从一个稳态值过渡到另一个稳态值的动态过程。从图2曲线可见,P、h的变化类似于一个二阶系统的过渡过程,它主要取决于压下执行机构的动特性。
First, the rolling mill dynamic characteristics and dynamic mathematical model 1. Dynamic characteristics of continuous rolling mill Figure 1 is a rack-driven motor in the step given under the transition curve, the transition process is also called the dynamic process, the need to use differential equations or transfer function To describe. As shown in Figure 2, under the action of the roll gap (SR), the pressure P is followed by the transition process. After a small delay at the exit of the frame, the distance h between the X-ray thickness gauge and the roll gap Caused by) the corresponding changes have taken place. These are dynamic processes that transition from one steady-state value to another. As can be seen from the graph in Fig. 2, the change of P and h is similar to the transition of a second-order system, which mainly depends on the dynamic characteristics of the actuator.