新热轧带钢卷取机踏步式电液伺服系统动态特性研究

Simulation and Research on Hot Strip Mill Coiler's Electro-hydraulic Servo System with Step-mode

针对带钢热连轧卷取机踏步控制电液伺服系统的工作原理、组成及动作过程进行阐述,为使系统满足卷取过程中动态响应要求,提出压力—位移双闭环控制方式,建立压力—位移双闭环控制电液伺服系统仿真模型,并进行数字仿真,准确计算出了助卷辊踏步轨迹及液压缸压力变化规律。为设计、制造卷取机助卷辊电液伺服系统及其现场调试提供依据,为进一步研究发展卷取机助卷辊踏步控制技术奠定了一定的理论基础。

The working principle, constitute and motion process of hot strip mill coiler＇s electro-hydraulic servo system with step control was explained in this paper. In order to make the system meet the requirement of the dynamic response in the process of coiling, the double closed-loop control method of pressure-displacement is put forward; the simulation model of electro-hydraulic servo system with double closed-loop control is built and data simulation is progressed, then the jumping trace of wrapper rolls and the changing law of the pressure in hydraulic cylinder are accurately worked out. The research in the thesis provided the foundation for designing and making the servo system of coiling roll and the experiment and adjusting on the spot. Meanwhile, it also established the theory foundation for the further study of the step control of coiling roll.