共查询到20条相似文献,搜索用时 46 毫秒
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通过把轧制力方程和厚度控制方程在小范围内线性化、离散化,用递推最小二乘法辨识出系统的状态空间模型.给出了基于Kalman滤波法的最优信息融合算法,并针对热连轧这个复杂的多变量系统设计了异步信息融合估计算法.将模型用于热连轧机带钢厚度预测中,同时也预测带钢塑性系数Q.最后把实时预测出的带钢出口厚度和带钢塑性系数应用于带钢热连轧厚度控制系统,提高了带钢厚度质量. 相似文献
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提出了用于热连轧分层递阶智能控制中的张力复合最优控制系统,板形板厚协调最优控制和速度设定的温度控制等3个子控制系统的优化设计方案,应用轧制主程和二次型目标函数推出板形板厚协调闭环最优控制、穿带过程辊缝最佳校正、轧辊凸度实时估计,最佳轧辊凸度设定和最佳弯辊力设定等热连轧过程优化策略。 相似文献
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The general cold rolling mill cannot dynamical display and quantitative control the section properties of strip due to lack of profile gaugemeter. To this problem, through a large number of field trials and theoretical studies, taking the general four-roll cold rolling unit as research object, comprehensive considered the equipment and process characteristics in tandem cold rolling process, based on the strip thickness distribution mechanism model of tandem cold rolling, a whole set of design method for the virtual profile gaugemeter and the feedback control technology for section properties was put forward. It make full use of incoming materia??s section configuration data which come from the profile gaugemeter of hot rolling unit, and the real-time rolling process parameters, such as rolling force, tension, roll bending force and roll tilt amount, which come from the level 1 of tandem cold rolling unit. It can not only dynamical display the section configuration of cold rolled product and dynamic forecast the wedge quantity and plate crown, but also feedback control the section properties of strip. The section quality of cold rolled steel strip product was greatly improved. This technology should be used widely. 相似文献
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边缘降前馈控制功能的开发和应用 总被引:1,自引:1,他引:0
结合用户对于电工钢产品在边部厚度精度要求的日益增加,分析了UCMW冷连轧机K-WRS边缘降控制系统中原前馈控制模型存在的问题.通过对测量设备凸度仪的改造,并对边缘降前馈控制模型进行全新的开发和新模型的运用,使UCMW冷连轧机边缘降控制水平和控制能力获得大幅度的提升,并且使电工钢产品边缘降厚度控制的实物水平提高近5%. 相似文献
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武汉钢铁集团公司二热轧1 580 mm热连轧机精轧机活套控制系统采用先进的数学模型,精确计算活套动作的各项控制参数,实现机架间带钢的恒定套量控制和微张力控制.数学模型包括活套套量数学模型和活套张力数学模型.实际应用结果表明,采用该数学模型的活套套量控制器和张力控制器都获得了较好的控制效果,降低了精轧机堆钢和拉钢事故的发生,提高了产品产量和成材率. 相似文献
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板带轧机垂直振动的研究与优化 总被引:7,自引:2,他引:5
针对板带产品板形与板厚的控制,从动力学观点对下列问题进行了研究:1)与板形、板厚直接相关的轧机机座垂直振动的力学模型;2)影响板形、板厚的模态指标;3)以板形、板厚波动为最小的动态优化数学模型。最后,对4200mm厚板轧机进行了分析和优化。 相似文献
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CVC轧机冷轧宽带材板形控制特性的数值模拟 总被引:11,自引:0,他引:11
以六次偶函数拟合宽带材出口横向厚度分布,计算了CVC轧机冷轧宽带材前张应力横向分布,首次以张应力横向分布的形式,模拟了CVC轧机冷轧宽带材板形控制特性,模拟结果证明:CVC轧机冷轧宽带材时具有很强的板形控制能力。 相似文献
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在秒流量方程的基础上,充分考虑厚度偏差和张力波动对速度的影响,推导并建立了1个冷连轧综合速度控制模型,并根据动态结构图配置了控制器.通过对比仿真研究,进一步优化了控制器参数,在某1 550 mm冷连轧生产应用中,将张力、厚度指标作为控制目标.速度参数作为控制对象,使张力波动从调整前的300 kg减小到目前的90 kg,... 相似文献
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Flatness is an important equality indicator of strip rolling and roll sub-sectional cooling is an important method for flatness control, especially for high order flatness component control. It is very hard to build the mathematic model of roll sub-sectional cooling because of its characteristics of nonlinearity, hysteresis quality and strong coupling etc. In order to improve the control effect of roll sub-sectional cooling control model, the roll sub-sectional cooling adaptive fuzzy control model based on fuzzy model inversion is built according to the separation principle of fuzzy form on the basis of the conventional fuzzy control model, where the parameters of the fuzzy controller can be dynamically regulated according to the change of rolling conditions. Simulation experiment results of the model indicate that the proposed roll sub-sectional cooling adaptive fuzzy control model based on fuzzy model inversion has high control precision and rapid response speed with strong self-learning and anti-interference capacity and a new method is provided for high-precision flatness control. 相似文献