连铸结晶器振动计算机控制系统设计及漏钢预报研究

发布时间：2018-02-28 21:12

本文关键词： 连铸结晶器正弦/非正弦振动计算机控制漏钢预报支持向量机　出处：《燕山大学》2016年硕士论文　论文类型：学位论文

【摘要】：连铸是钢铁生产的主要手段,而结晶器的合理振动对连铸工艺和铸坯质量有直接的影响,是保证连铸顺利进行的关键环节。实践表明采用非正弦(或正弦)振动规律可以获得良好的连铸效果。本文以电液伺服驱动的连铸结晶器振动平台为研究对象,设计了连铸结晶器振动计算机控制系统,并对结晶器振动过程中可能产生的漏钢事故进行了理论研究。主要工作如下:首先,针对实验室现有的电液伺服驱动的连铸结晶器振动平台,详细介绍了该振动系统的工作原理、总体组成及振动方式。其次,提出了连铸结晶器振动计算机控制系统的总体设计方案。根据设计方案,通过对Windows环境下Visual C++可视化编程语言的学习和对数据采集卡的应用研究,设计并开发了连铸结晶器振动系统计算机控制系统,编写了友好的上位机监控界面,实现了对结晶器振动情况的实时监测与控制的功能。再次,详细介绍了漏钢事故的种类,针对发生概率较高的漏钢事故,从发生机理上对其进行深入分析,提出了一种基于GA-SVM分类器的漏钢预报算法。根据某钢厂提供的结晶器热电偶实测的温度数据进行实验仿真,结果表明本文所提算法的漏钢预报准确度可达97.7%。最后,对所开发的计算机控制系统进行了实验室实验研究。分别对结晶器的七种振动方式(正弦振动波形和六种非正弦振动波形)进行实验,结果表明所设计计算机控制系统能够实现在线修改、位移跟踪和波形随拉速的平滑切换等重要功能。
[Abstract]:Continuous casting is the main means of iron and steel production, and the reasonable vibration of mould has a direct effect on the continuous casting process and the quality of the billet. The practice shows that the non-sinusoidal (or sinusoidal) vibration law can obtain a good continuous casting effect. In this paper, the electro-hydraulic servo driven continuous casting mould vibration platform is taken as the research object. A computer control system for continuous casting mould vibration is designed, and the possible breakout accidents during mold vibration are studied theoretically. The main work is as follows: first, Aiming at the existing electro-hydraulic servo drive continuous casting mould vibration platform in laboratory, the working principle, overall composition and vibration mode of the vibration system are introduced in detail. The overall design scheme of computer control system for continuous casting mould vibration is put forward. According to the design scheme, the study of Visual C visual programming language and the application of data acquisition card in Windows environment are carried out. The computer control system of continuous casting mould vibration system is designed and developed, and a friendly monitoring interface of upper computer is compiled. The function of real-time monitoring and control of mould vibration is realized. Thirdly, the types of breakout accidents are introduced in detail. Aiming at the breakout accident with high probability, this paper analyzes the mechanism of breakout, and puts forward a breakout prediction algorithm based on GA-SVM classifier. The experimental simulation is carried out according to the measured temperature data of mould thermocouple provided by a steel mill. The results show that the prediction accuracy of the method proposed in this paper can reach 97.77.Finally, The computer control system has been studied in laboratory. Seven kinds of vibration modes (sinusoidal vibration waveform and six non-sinusoidal vibration waveform) of the crystallizer have been tested. The results show that the computer control system can realize some important functions, such as on-line modification, displacement tracking and smooth switching of waveform with pull speed.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TF341.6;TP273

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