秒流量控制的研究及其在液压AGC系统中的应用  

Research on second-flow control and its application in hydraulic system AGC

作　　者：杨景明[1,2] 任敬伟 孙杜娟[1] 车海军[1,2] 

机构地区：[1]燕山大学工业计算机控制河北省重点实验室,河北秦皇岛066004 [2]国家冷轧板带装备及工艺工程技术研究中心,河北秦皇岛066004

出　　处：《锻压技术》2016年第1期71-76,共6页Forging & Stamping Technology

基　　金：国家自然科学基金资助项目(61074099);国家自然科学基金委员会与宝钢集团有限公司联合资助项目(U1260203);河北省高等学校创新团队领军人才培育计划资助项目(LJRC013)

摘　　要：由于光电编码器分辨率的限制,造成基于光电编码器的秒流量液压AGC(Automatic Gauge Control)系统在板厚控制过程中的板厚控制精度达不到要求的问题,采用插入高频脉冲的方式,来提高光电编码器的测速精度,计算结果显示插入高频脉冲后光电编码器的测速误差由原来的1.6%下降到0.04%。为实现高频脉冲的插入设计了一款基于FPGA的秒流量计,并将其应用于秒流量液压AGC系统中,经过实际数据统计,秒流量计和测厚仪测量出的轧机出口侧板厚之间的误差小于0.1%,由此证明秒流量计的板厚测量精度可以满足板厚控制系统的要求。将基于秒流量计的秒流量液压AGC系统应用于冷轧现场显示,该系统控制板厚误差在±5μm以内,且系统具有很好的稳定性、鲁棒性和实用性。According to the issue that the thickness control precision is not met the requirements during the thickness control process by second-flow hydraulic automatic gauge control system due to the limitation of photoelectric encoder resolution, the mode of inserting a high- frequency pulse was used to improve the speed accuracy measured by the photoelectric encoder. The calculation results show that the speed measurement error decreases from 1.6% to 0. 04% . A second-flow meter based on FPGA was designed to realize the high frequen- cy pulse inserting, which is used in the second-flow hydraulic AGC system. The real data statistics indicates that the thicknesses error be- tween the second-flow meter and thickness gauge for lateral plate of mill outlet is less than 0. 1%. Therefore, the thickness accuracy measured by the second-flow meter can meet the requirement of the automatic thickness control system. The second-flow hydraulic AGC system based on the second-flow meter was applied in cold rolling, which brings a thickness control error within ±5μm. As a result, the system is of good stability, high robustness and high practical value.

关 键 词：自动板厚控制 秒流量计 现场可编程门阵列 移位寄存器 自适应补偿 

分 类 号：TH814[机械工程—仪器科学与技术] TN762[机械工程—精密仪器及机械]