Design and application of active disturbance rejection controller for main drive system of rolling mill
轧机主传动系统自抗扰控制器设计与应用

The output and quality of metal plate and strip are heavily affected by electromechanical vibration in rolling process.To suppress electromechanical vibration,we aim at the characteristics of main drive system of rolling mill with uncertain external load disturbance and unmodelled dynamics.The model of main drive system of rolling mill is established,where uncertain external load disturbance and unmodelled dynamics are regarded as one integrated disturbance.Then,a new observer is proposed to observe and compensate this integrated disturbance,and a robust controller of main drive system of rolling mill is designed based on active disturbance rejection control(ADRC) technology.This controller has very strong robustness not only to external load disturbance,but also to unpredictable plant parameter variations such as inertia of load and coefficient of torque.The electromechanical vibration is effectively suppressed.It is the first time that extended states observer(ESO) is utilized in electromechanical vibration control for main drive system of rolling mill.Its effectiveness is verified by the simulated result.