中文摘要：

为防止轧辊偏心引起GM—AGC（Gauge Meter Automatic Gauge Control）系统误动作导致厚差精度恶化，某铝厂引进的热精轧机组GM—AGC系统中采用了轧辊偏心动态死区法。给出动态死区法的设计思想及其构成；结合轧辊偏心信号的特点，分析动态死区的工作原理：根据GM—AGC系统的调节过程，推导引起GM-AGC系统误动作的厚度偏差与实际轧制力变化量的关系，从而解释动态死区设置的转换系数。实际应用效果表明，动态死区的死区宽度随着合成轧辊偏心信号的状态而变化，有效抑制了GM—AGC系统的误动作，阻止了厚差精度恶化，且能够适应轧制速度发生变化的情况。

英文摘要：

To avoid deteriorating the accuracy of thickness deviation induced by GM-AGC system of the misoperation caused by roll eccentricity, the dynamic deadband is used in the GM-AGC system of hot finishing mill group introduced by an aluminum plant. The design idea and the constitution of dynamic deadband method are given in this paper. The mode of operation of dynamic deadband is analyzed combining with the characteristic of roll eccentricity signal. Furthermore, the conversion factor is explained through deriving the relationship between the thickness deviation inducing misoperation of GM-AGC system and the change of actual total rolling force based on the adjustment process of GM-AGC system. The actual application effect shows that the deadband width of dynamic deadband can vary with the situation of synthetic roll eccentricity signal and the deterioration of the accuracy of thickness deviation is prevented through inhibiting the misoperation of GM-AGC system. Moreover, the variation of deadband width in dynamic deadband method is able to fit the change of rolling speed.