钢材生产中线材飞剪控制的研究

发布时间：2018-09-14 14:39

【摘要】：飞剪是轧钢生产中的一个重要环节,由于其高速、连续和精准的工作特点,使得飞剪控制系统是轧钢自动化系统中最为复杂的系统之一,对其精度控制要求也相当高。因此,飞剪控制的研究是轧钢技术领域中重要的研究课题之一。本文从以下几个方面对本系统进行论述。首先对飞剪控制的国内外的发展现状进行了简要的比对介绍,同时对飞剪剪刃工作的定位和启停控制进行了分析,并对原有调速系统进行了剖析,在此基础上,对直流调速装置进行了改进设计,给出了多H桥双向功率变换器的驱动方案。通过传统的PID控制方法和模糊-PID控制方法进行了比较研究,设计了模糊-PID的控制器,并在MATLAB的环境下对其进行了仿真研究,结果说明了模糊-PID控制方法在飞剪控制上的优势。另外,鉴于飞剪控制的非线性因素较多、难以建立准确模型的情况,可以将变结构控制应用于线材飞剪控制上,通过在系统中设计变结构控制器予以实现。这样就可克服飞剪非线性因素的影响,充分发挥变结构控制对系统参数及扰动不敏感、响应速度快和鲁棒性强等优点。所以飞剪控制系统电机的控制具有良好的效果。最后对实际的PLC控制系统的软硬件系统进行了总体的设计。通过以上几方面针对轧钢生产中飞剪控制的研究,取得了令人满意的效果。
[Abstract]:Flying shear is an important link in rolling production. Because of its high speed, continuity and precision, flying shear control system is one of the most complex systems in rolling automation system, and its precision control requirement is very high. Therefore, the research of flying shear control is one of the most important research topics in the field of steel rolling technology. This paper discusses the system from the following aspects. Firstly, the development status of flying shear control at home and abroad is briefly compared and introduced. At the same time, the positioning and starting and stopping control of flying shear blade are analyzed, and the original speed regulation system is analyzed. The design of DC speed regulating device is improved, and the drive scheme of multi-H bridge bidirectional power converter is given. By comparing the traditional PID control method with the fuzzy pid control method, the fuzzy pid controller is designed and simulated under the environment of MATLAB. The results show the superiority of the fuzzy pid control method in the flying shear control. In addition, in view of the fact that there are many nonlinear factors in flying shear control, it is difficult to establish an accurate model, so variable structure control can be applied to wire shear control, which can be realized by designing variable structure controller in the system. In this way, the influence of nonlinear factors of flying shear can be overcome, and the advantages of variable structure control being insensitive to system parameters and disturbances, fast response speed and strong robustness can be brought into full play. So the control of the motor in the flying shear control system has a good effect. Finally, the hardware and software system of the actual PLC control system is designed as a whole. Through the research on the control of flying shear in rolling steel production, satisfactory results have been obtained.
【学位授予单位】：青岛理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG334.9;TP273

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