A practical decoupling control solution for hot strip width and gauge regulation based on active disturbance rejection
热连轧板宽板厚的实用自抗扰解耦控制

To deal with the strong interactions between loops, large time-delay and random uncertainties in the multivariable system of the hot rolling mill, we propose a solution of active disturbance-rejection control (ADRC). In this solution, a time-delay unit is added before the conventional reduced-order extended-state observer. For the fair comparison of the proposed ADRC and the conventional PID controller, parameters of each algorithm are obtained by using the mutative-scale chaotic optimization method. Simulation results show that the optimized ADRC not only has better decoupling performance, but also provides higher robustness and adaptability against the model-parameter uncertainties and external disturbances.