Research And Development Of Semi-physical Simulation Software For Operation Optimization Control Of Electric Fused Magnesium Furnace

The fused magnesia has the characteristics of oxidation resistance,high melting point and strong insulation,and is widely used in metallurgy,aerospace,chemical and other fields.The equipment used to smelt fused magnesia is a three-phase alternating current fused magnesia furnace,which is a typical high-energy-consuming equipment.The smelting process requires complex operational optimization control algorithms to determine the optimal current setting.The value and control of the three-phase electrode current to stably track the optimal set value,so as to achieve the product output,the single-ton energy consumption can be within the target value range and the control target as small as possible.Based on the smelting characteristics and control objectives of fused magnesium furnace,this paper designs and develops a semiphysical simulation software for the operation optimization control of fused magnesium furnace,which provides a simulation verification platform for the algorithm proposed by algorithm researchers.At the same time,the simulation software can also be used in the teaching process of students,which helps students to intuitively grasp the practical application of running optimization control algorithms in industrial environments.Based on the above reasons,this paper researches and develops a semi-physical simulation software for the operation optimization control of fused magnesium furnace under the support of the Natural Science Foundation "Study on the intelligent closed-loop setting control method for fused magnesium furnace for energy saving and consumption reduction".The software can simulate the dynamic characteristics of the fused magnesium furnace industrial site and realize the verification of the optimal control algorithm for the smelting process of the fused magnesium furnace.The specific work of this paper is as follows:1.The semi-physical simulation software for the operation optimization control of fused magnesium furnace consisting of controlled object module,operation optimization control algorithm development module and simulation effect monitoring module is designed.The controlled object module is used to simulate the dynamic characteristics of the actual fused magnesium furnace smelting process;the operation optimization control algorithm development module is used to design,develop and debug the control algorithm;the simulation effect monitoring module is used to control the developed control algorithm.The effect is monitored in real time.2.The semi-physical simulation software for the operation optimization control of fused magnesium furnace was realized.The three parts of the controlled object module,the operation optimization control algorithm development module and the simulation effect monitoring module were developed separately.(1)The controlled object module is composed of the controlled object model sub-module,the model correction sub-module,and the cloud data reading sub-module.The controlled object model sub-module is developed by Matlab software platform to simulate the dynamic characteristics of the fused magnesium furnace smelting process;in order to improve the model accuracy,the model correction sub-module reads the fused magnesium stored in the cloud through the cloud data reading sub-module.The actual process data of the furnace is used,and the actual process data obtained is used to perform offline/online correction of the controlled object model to ensure the accuracy of the model.The model-corrected human-computer interaction function is realized through a monitoring interface developed based on Wince configuration software.(2)The operation optimization control algorithm development module adopts the modelbased design(MBD)idea,which can realize the current loop control,current setting control,self-optimization correction and other algorithms of the melting process and the development of user-defined algorithms,and will be based on the RTW mechanism in Matlab.The developed algorithm model is automatically compiled into an embedded code file,and the file is automatically downloaded to the embedded controller through SFTP to realize the development process of the complex algorithm.(3)The simulation effect monitoring module is based on the Linux real-time operating system environment,and the simulation effect monitoring software is developed by using the Qt software platform,which can perform real-time monitoring of the simulation experiment process.The experimental results can be evaluated by different evaluation indicators.When the experimental results are not good,the algorithm parameters can be adjusted through the humancomputer interaction interface to improve the performance of the algorithm.3.Experimental verification of simulation software.The real-time simulation verification of the controlled object model is carried out for the established three-phase current model.The experimental results show that the established current model can simulate the current dynamic characteristics of the actual fused magnesia furnace;based on the three-phase current model and the single-ton energy model,Experimental studies of current loop control,current setting control,self-optimization correction and other algorithms verify the availability of the developed software.