Design And Development Of The Embedded Operation Optimization Simulation Experiment System For Fused Magnesia Furnace

Fused magnesia is a high-grade refractory material with high melting point,strong oxidation resistance and strong slag resistance and.Its main production facility is the electric melting magnesia furnace which is one of the ore smelting electric furnace.It is a typical high energy consuming equipment,reducing the energy consumption per ton of products will directly bring considerable economic benefits to the enterprises in the smelting process.In order to achieve the goal of minimizing the energy consumption per ton of energy under the premise of ensuring the output,the control system of electric melting magnesium furnace needs to be able to achieve current optimization settings,current tracking control and other complex control functions.Due to the integrated complexity of the smelting process with strong coupling and strong nonlinear complex characteristics,there is a great risk with high cost(time cost,manpower cost and equipment cost),long cycle and certain impact on the development of control algorithm if the designed complex control algorithms are directly implemented and researched in the actual production process.To solve the problem of engineering verification of complex control algorithm,it is significant to develop a system platform that can fully simulate the dynamic characteristics of real electric melting furnace,facilitate the development of all kinds of complex control algorithms and verify algorithm based on the dynamic characteristics of fused magnesia furnace.Considering the embedded controller has high integration,the complex algorithm support ability,simple programming and so on,based on the key projects of National Natural Science Foundation "Research and application of knowledge automation system for process industry optimized control and safe operation",relying on the State Key Laboratory of integrated automation of process industry,this paper develops embedded operation optimization simulation experiment system of fused magnesium furnace,the main work is as follows:1.This paper develops embedded operation optimization simulation experiment system of fused magnesium furnace,which is composed of virtual object subsystem,control algorithm development subsystem and embedded control subsystem.The virtual object subsystem is used to fully take into account the actual characteristics of fused magnesia furnaces in simulations.The control algorithm development subsystem is used to develop operation optimization control algorithm,and the embedded control subsystem is used to realize operation optimization control.2.This paper designs and develops the system hardware platform.According to the system requirements,the hardware part of the virtual object subsystem and control algorithm development subsystem adopts the industrial control computer,and the embedded control subsystem hardware is made up of the embedded CPU motherboard based on X86 architecture,the power module and the self-developed embedded chassis.The virtual object subsystem and the embedded control subsystem transmit the data through the serial port,while the control algorithm development subsystem and the embedded control subsystem realize the fast downloading of the control program through the Ethernet.In order to make the related hardware devices work normally,the hardware driver is developed by using the S function program.And the system hardware platform is built.3.This paper designs and develops the system software platform.First,the virtual object subsystem software is designed and developed,including the establishment of current model,the development of model software and the design and development of model monitoring interface.In order to enrich the function of the system and enable the simulation system to do different kinds of modeling experiments,the least square method and the random weight neural network method are used to establish the current model respectively.On the basis of the established model,a virtual object model is established by using MATLAB software platform,and the model monitoring interface which is used to monitor the operation effect of current model,model selection and model parameter setting is developed by using SIEMENS WinCC software.Secondly,control algorithm development subsystem is designed and developed,the researchers developed control algorithm software by this subsystem and make the control algorithm compile into embedded C code automatically by RTW mechanism in MATLAB and downloaded to the embedded controller.Finally,the embedded control system software is designed and developed,including control program and monitoring program.In the Linux real-time operating system environment,this paper uses QT software to develop the monitoring module,and load the control program generated in the control algorithm development subsystem to the QT project to debug and compile,and generate executable files.According to the operation condition,control program can adjust the current setting value,and ensure that the three-phase electrode current can stably track the current setting value,and the monitoring program can optimize the running effect of the algorithm of monitoring,such as the current setting value,three phase current,three phase motor rotating frequency and energy consumption per ton,while the experimental personnel can adjust the controller parameters.4.Experimental verification of the simulation system.A virtual object model simulation experiment is carried out for the established current model.The experimental results show that the established model can simulate the current dynamic characteristics of the fused magnesia furnace.Based on the established current model,the experimental research on the operation optimization algorithm of the electric melting magnesium furnace has been carried out,and the availability of the developed system is verified.