Abstract: Aiming at the slow speed response and poor synchronization performance of the upper and lower roll drive motors in the single roll drive system of rolling mill and in iron and steel rolling, DC motors were used as research objects to study the speed response time and synchronization error performance of the upper and lower motors in the single roll drive system of rolling mill, so as to make the ESO and load balance, and the control strategy combining the controller was designed. The estimated angular velocity of upper and lower rolls observed by the ESO was used as input of the load balancing controller, and disturbance compensation was added to the ESO to suppress the dynamic speed drop caused by the external disturbance of rolling load. The single neuron adaptive PID was used as the load balancing controller. The stability, accuracy and rapidity of the algorithm system were improved.The results indicate that the ESO can improve the response time, synchronization error effect and synchronization performance of the motor, and improve the control effect and anti-disturbance ability of the complex main drive system of rolling mill.
Key words: rolling mill single roll transmission; synchronous control; extended state observer(ESO); cross-coupling structure; load balance controller