【作者】 刘兆飞；

【导师】 任庆昌；

【作者基本信息】 西安建筑科技大学 ， 控制理论与控制工程， 2007， 硕士

【摘要】 矿热炉是生产铁合金的主要设备，对其控制的好坏直接影响到产品的质量、企业的经济效益。对矿热炉进行控制策略的研究和自动化技术改造，对企业的增产降耗，减轻工人劳动强度，有重大的意义和价值。针对当前采用电流作为控制量的弊端，在分析矿热炉主电路的基础上，提出了采用熔池电阻作为控制量的控制方案，并给出了熔池电阻的计算公式。在研究了硅锰生产工艺流程的基础上，本文针对一台12500KVA的硅锰矿热炉设计了由上位机(PC)和下位机(PLC)构成的控制系统方案。下位机采用具有模块化结构的可编程控制器Siemens S7-300完成数据的采集和对生产工艺的控制。上位机采用组态王软件设计了监控应用程序，提供了友好的人机交互界面和实时数据管理功能。采用T-S模型的模糊辨识方法，建立了矿热炉电阻控制系统的T-S模糊模型；在此基础上，设计了模糊数模型控制器，运用MATLAB仿真软件对该控制系统进行仿真，并与传统控制规律(常规PID)的仿真结果进行比较分析。仿真结果表明，本文提出的控制策略使矿热炉电阻控制系统有较好的抗干扰和较高的调节精度。更多还原

【Abstract】 Submerged arc furnace is the main equipment of ferroalloy producing. The quality of the product and the enterprise’s economic efficiency mainly depend on the controlling of it. There is much significance and value for the studying of the controlling strategy and automation technological reform of it.Point to the defect of current use current as controlled, based on the analysis of the main circuit of the submerged arc furnace, the control strategy using molten bath resistance is introduced and the formula of molten bath resistance calculation is given. On the basis of studying silicon-manganese production technology, an automatic control system which consists of PC and PLC for a 12500kVA silicon-manganese submerged arc furnace was designed. Modularized PLC Siemens S7-300 system is used to collect data and control production technology, and Kingview software is used to design supervisory program which has a friendly human machine interface and can manage real-time data.Using TS fuzzy model identification, TS fuzzy model of submerged arc furnace resistance control system is proposed, and fuzzy number model controller is designed. Matlab software is used to simulate the control system, and the result of it is compared with the traditionally designed PID control. The simulate analysis result show that the proposed control strategy used in submerged arc furnace resistance control system has better anti-jamming and accuracy.更多还原