Abstract
AbstractA nonlinear model of the rolling mill automatic position control system is derived based on analyzing the friction between roll and metal plate, the flexibility and the roll eccentricity force. The nonlinear characteristic of the automatic position control (APC) system is analysed. The result shows the APC system has chaotic characteristics. Aim at the characteristics of the APC system,such as nonlinear and variable parameter,a robust controller of the APC system is designed based on active disturbance rejection control(ADRC) technology. The simulation results show that the ADRC controller has very strong robustness to the system chaos and the large load disturbance, and rapid and smooth control process and high steady precise performances can be implemented.KeywordsAutomatic Position Control(APC)ChaosActive Disturbance Rejection Controller(ADRC)Robustness
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