Practical active disturbance rejection solution for monitoring automatic gauge control system with large time-delay
实用自抗扰控制在大时滞厚度自动监控系统中的应用

A practical active disturbance rejection control (ADRC) solution is proposed for the monitoring automatic gauge control (AGC) system with large time-delay in the hot strip mill. Employing a linear reduced-order model with optimized parameters, the practical ADRC is simple to use, easy to tune and energy-efficient in dealing with the uncertainties and disturbances in plant dynamics. Through the order reduction in both the plant model and the state observer, we develop a first order extended state observer for estimating in real-time the total value of the external and internal disturbances. Simulation results show that the proposed practical ADRC solution compares favorably to the existing solutions, including the standard ADRC, the Smith Predictor and the PID controller, which are all optimized using the mutative scale chaos optimization method to make the comparisons fair. Both the practical and standard ADRCs outperform the Smith Predictor and the PID controller in disturbance-rejection and robustness; however, the practical ADRC has fewer adjustable parameters and significantly smaller energy consumption than the standard ADRC, making it a viable candidate for industrial applications.