AGC系统高精度厚度计公式的工程研究

以某中厚板轧钢厂四辊精轧机液压AGC系统为背景，系统地研究了AGC系统核心数学模型－－高精度厚度计公式在工程实际中的实现，主要包括：轧机自动清零、轧机自动刚度测试、轧机刚度宽度补偿、油膜厚度测量、轧辊偏心补偿。     

冷连轧过程控制中轧制力和前滑模型的综合自适应

为了提高冷连轧过程控制系统中轧制力模型的设定精度,提出了一种轧制力和前滑模型的综合自适应算法.通过建立综合自适应目标函数,以变形抗力和摩擦系数模型中的自适应系数作为寻优参数,并采用Rosenbrock算法求解目标函数,可以同时得到满足轧制力模型和前滑模型计算精度的自适应系数.该模型自适应算法可成功应用于某1 450 mm冷连轧机组.结果表明,采用该模型的综合自适应算法后,轧制力设定精度显著提高,且满足在线控制要求.     

Algorithm design and application of novel GM-AGC based on mill stretch characteristic curve简

As the spring equation is limited to the accuracy of mill stiffness and the linearity of the mill spring curve, the traditional gaugemeter automatic gauge control （GM-AGC） system based on spring equation cannot meet the requirements of practical production. In allusion to this problem, a kind of novel GM-AGC system based on mill stretch characteristic curve was proposed. The error existing in calculating strip thickness by spring equation were analyzed first. And then the mill stretch characteristic curve which could effectively eliminate the influence of mill stiffness was described. The novel GM-AGC system has been applied successfully in a hot strip mill, the application results show that the thickness control precision is improved significantly, with the novel GM-AGC system, over 98.6% of the strip thickness deviation of 3.0 mm class can be controlled within the target tolerances of ±20 μm.     

热轧厚规格窄带钢厚度控制策略优化

针对某450 mm窄带钢生产线生产6.00 mm以上厚规格产品时带钢扭转导致测厚仪产生厚度测量偏差，严重影响厚度自动控制系统的正常投用，对产品厚度控制精度产生影响的问题，通过对轧件扭转前后轧件厚度的比较，实现了6.00 mm以上厚规格产品的厚度测量补偿，以此为基础实现了厚度的精确控制。现场实际生产应用表明，6.00 mm以上厚度规格96%以上达到了±50 μm的厚度控制精度，有效地保证了产品质量。     

Advanced run-out table cooling technology based on ultra fast cooling and laminar cooling in hot strip mill

In order to meet the severe requirements of market and reduce production costs of high quality steels, advanced run-out table cooling based on ultra fast cooling (UFC) and laminar cooling (LC) was proposed and applied to industrial production. Cooling mechanism of UFC and LC was introduced first, and then the control system and control models were described. By using UFC and LC, low-cost Q345B strips had been produced in a large scale, and industrial trials of producing low-cost dual phase strips were completed successfully. Application results show that the ultra fast cooling is uniform along the strip width and length, and does not affect the flatness of strips. The run-out table cooling system runs stably with a high precision, and makes it possible for the user to develop more high quality steels with low costs.     

基于流量预估的直拉式冷轧机液压张力控制策略

根据带钢性能和工艺开发的要求,开发了机架前后配置张力液压缸的直拉式冷轧实验机.通过设置张力控制器直接对实际张力进行闭环控制的方式,无法实现张力液压缸速度与轧制速度的匹配,也无法满足动态下高精度且稳定的张力控制要求.针对此问题,通过对张力液压缸流量方程的研究,提出了基于流量预估的液压张力控制策略.流量预估控制精确计算出同时满足张力液压缸移动速度和设定张力的伺服阀控制电流,同时对控制因子进行在线修正以获得最优预估控制效果.动态张力补偿控制补偿预估控制后剩余的张力偏差.现场应用效果表明,该策略取得了良好的控制效果,动态下张力控制误差小于±3%.     

凌源毛家店矿区金矿成矿规律与找矿方向探讨

毛家店金矿床位于凌源——喜峰口金成矿带的北东部，受区域构造控制，为与燕山期二长花岗岩和八道河群变质杂岩有密切成因联系的含金石英脉型金矿床。通过对矿床地质特征的分析，进一步总结该区金矿成矿规律，初步认为区内的隐伏矿床具有良好的找矿前景。     

攀钢1450mm热连轧机层流冷却控制系统的开发及应用

阐述了攀钢1 450 mm热连轧机层流冷却控制新系统的开发与应用。该系统采用α机过程控制系统,通过预设定、在线前馈和自适应三大功能,对层流冷却模式、冷却速率和最终卷取温度进行控制,卷取温度控制精度较原系统有较大提高,±20℃的命中率由原来的88.6%提高到现在的96.4%。     

新控制方法在攀钢层流冷却基础自动化系统中的应用

介绍液位控制、目标卷取温度的前馈控制和带有Smith预估器反馈控制在攀钢热轧厂层流冷却基础自动化系统中的应用 ,这些方法具有很好的控制效果 ,可以广泛用于这类系统     

BP神经网络PID控制对液压伺服控制的改进

 热力模拟实验机的液压系统既要求工作在大流量区域,又要求工作在微小流量区域,需要在极宽的工作范围内精确地控制锤头的位移。基于热力模拟实验机液压伺服系统的低阻尼、时变性、非线性等特点,应用传统的PID控制器不能达到理想的控制效果。结合BP神经网络的PID控制理论根据锤头在不同位置的实际值、设定值及误差在线整定参数Kp、Ki、Kd,通过测试矩形波实际曲线与设定曲线的对比得出,基于BP神经网络的PID控制方法对液压伺服的控制有了很大改进。