铝电磁连续铸轧改进型复合磁场控制系统  

Improved Complex Magnetic Field Control System of Aluminum Electromagnetic Continuous Roll-casting

作　　者：黄燕[1] 凌玉华[1] 杨欣荣[1] 廖力清[1] 

机构地区：[1]中南大学信息科学与工程学院,湖南长沙410083

出　　处：《控制工程》2009年第S1期6-8,共3页Control Engineering of China

基　　金：国家863高技术计划基金资助项目(2001AA337070)

摘　　要：针对现有铝电磁连续铸轧复合磁场控制系统存在的变频范围窄、控制不稳定等问题,通过分析电磁铸轧机理,采用SPWM交-直-交变频的设计方案。同时,由于现有控制系统是一开环系统,电磁铸轧铝板特性参数难以在线检测,提出建立基于标准支持向量机的晶粒度软测量模型的思想,并给出了基于软测量模型的形式化描述、设计原则及设计步骤。实验结果表明,改进后的系统能产生符合工艺要求的复合磁场,电磁场频率的作用范围为10～25Hz,换相周期数为1～5,谐波分量较小;同时生产出的铝板组织均匀,晶粒度达到1级水平。In order to solve the problems of narrow range of frequency conversion and unsteadiness control of the composite magnetic field control system in the existing aluminum electromagnetic continuous roll-casting(ACER) process, the principle of AECR and effects produced by electromagnetic parameter on quality of roll-casting sheet are analyzed. A design scheme of AC-DC-AC frequency inverter based on Sinusoidal Pulse Width Modulation(SPWM) is adopted in the system.A thinking of establishing a grain size soft-sensor model of SVM-based is advanced,also a formal description, a design principle and design steps of the SVM-based soft-sensor model are given,which provides a new approach for the on-line detection on the grain size of roll-casting aluminum sheet.The results show that a composite magnetic field according with technologic requirements can be produced by the ameliorated control system.The action sphere of the electromagnetic field frequency is 10～25 Hz,the number of commutation cycle is 1～5,and harmonic component is small.The aluminum sheet has homogeneous microstructure,of which grain size reaches the first-class level.

关 键 词：电磁铸轧 复合磁场 软测量模型 交-直-交变频 

分 类 号：TP274.4[自动化与计算机技术—检测技术与自动化装置]