基于虚拟轧制的冷带轧机压下电液伺服系统建模与仿真

Modeling and Simulation on Screw-down Electric-hydraulic Servo System of Cold Rolling Mill Based on Virtual Rolling

研究成本小、风险低并能全面揭示冷带轧机轧制过程特性的虚拟轧制技术具有重要的现实意义。压下电液伺服系统是液压AGC系统的重要组成部分,以300 mm冷带轧机为研究对象,分析冷带轧机压下电液伺服系统的数学模型,建立一种三自由度轧机负载的压下电液伺服系统模型,包括轧机液压负载系统模型和动力机构模型。该模型可为虚拟轧机轧制设备级仿真提供压下电液伺服系统的仿真模型,模拟液压AGC系统的动态调节过程,并能为过程控制级提供虚拟的轧制力实测值和缸位移量。仿真结果表明:该模型的阶跃响应曲线与实际响应基本相同,模型精度较高。

It is important to study virtual rolling technique,which is less-cost,low-danger and can be used to reveal characteristics of rolling process.Screw-down electric-hydraulic servo system is the important part of hydraulic AGC system.300 mm cold rolling mill was studied and mathematical model of screw-down electric-hydraulic servo system was analyzed.A three-DOF mathematical model of hydraulic screw-down system was built,including hydraulic load model and power mechanism model.The model can provide simulation model of screw-down electric-hydraulic servo system for rolling equipment level of virtual rolling mill,to simulate dynamic adjusting process of hydraulic AGC system and to provide virtual rolling force value and cylinder position value.Simulation results indicate that the step response of the model is similar with practical response,and the model precision is high.