《板带热连轧硬度前馈控制系统的应用研究》-毕业论文设计（学术).doc

板带热连轧硬度前馈控制系统的应用研究 摘要 热连轧带钢厚度精度一直是提高产品质量的主要目标，它主要取决于精轧机组。现代热连轧精轧机组都装备有自动厚度控制系统（AGC），它用来克服带钢工艺参数波动对厚差的影响并对轧机参数的变动给予补偿。AGC系统的主要任务是对带钢全厂进行厚度控制以保证带钢的厚度精度及其百分比。为进一步提高带坯全长厚控制精度及控制品质，针对以反馈为主的“经典”控制策略的不足，通过对带钢温度波动对出口厚度“重发性”影响的分析，提出了硬度前馈自动厚度控制方案。对各机架实施前馈控制后，其作用是减少温度变化对板厚和带钢平直性能的影响。前馈的最大优点是控制上不存在滞后，尤其是对于突发性成分所导致的厚度变化最为有利。对突发性的头部鼓包，本体水印及尾部尖峰，前馈比反馈好。前馈控制对活套的扰动比反馈好。前馈可以对主速度采用提前补偿以克服主传动响应低于压下的问题。 关键词：热连轧带钢；硬度前馈KFF-AGC；计算机控制 Hot strip rolling hardness feedforward control system application Abstract Hot Strip thickness accuracy has been improving product quality is the main objective, which mainly depends on the mill. Modern hot rolling mill is equipped with an automatic thickness control system (AGC), It used to overcome the technical parameters strip thickness fluctuations of the impacts of changes in the parameters of Mill compensation. AGC the main task is to strip the whole factory to ensure control of the thickness of the strip thickness and the percentage accuracy. To further enhance the long strip thickness control precision and control quality, response to feedback of the classic control deficiencies, Through the strip temperature fluctuations in the export thickness re-issued impact analysis the hardness feedforward automatic gauge control program. On the rack before feedforward control, whose role is to reduce the temperature of strip thickness and flatness performance. Feedforward control of the biggest advantages is there is no lag, especially for the unexpected elements lead to changes in the thickness of the most favorable. Sudden right on the head drum kits, bulk watermark and the tail rush, feedforward than good feedback. Feedforward control of the disturbance Looper than good feedback. Feedforward can be used to speed ahead of the main compensation to overcome the main drive below the pressure in response to the problem. Keywords : Hot Strip; Hardness feedforward KFF - AGC; Computer Control 目录 1 绪论………………………………………………………………………………………… 1