针对辊缝型监控AGC控制时的滞后特点,采用新型Smith预估策略对监控AGC系统进行纯滞后补偿。根据监控AGC各个主要控制环节的传递函数,推导纯滞后补偿控制器的理论预估模型。采用最优降阶算法对理论模型降阶,给出了基于最优降阶模型下纯滞后补偿控制器的离散化算法及设计步骤。现场实际应用效果表明:带有最优Smith预估算法的辊缝型监控AGC具有稳定性强、动态特性好及稳态精度高的优点。 Aimed at the lag characteristic of roll gap monitoring AGC control, a new type of Smith estimation strategy is adopted to compensate the delay of the monitoring AGC system. According to the transfer function of monitoring the main control links of AGC, the theoretical prediction model of pure hysteresis compensation controller is deduced. Using the optimal reduction algorithm to reduce the theoretical model, the discretization algorithm and design steps of the pure delay compensation controller based on the optimal reduced order model are given. The practical application results show that the AGC with the optimal Smith estimation algorithm has the advantages of strong stability, good dynamic characteristics and high steady-state accuracy.