锻压技术

秒流量控制的研究及其在液压AGC系统中的应用

英文标题：Research on second-flow control and its application in hydraulic system AGC

单位：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

分类号：

出版年,卷(期):页码：2016,41(1):71-76

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±5 μm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 frequency pulse inserting, which is used in the second-flow hydraulic AGC system. The real data statistics indicates that the thicknesses error between 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 ±5 μm. As a result, the system is of good stability, high robustness and high practical value.

基金项目：

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)

杨景明（1957-），男，博士，教授

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