Virtual Prototype Simulation And Control System Optimization Of Electrode Slipping Device In Submerged Arc Furnace

In the process of producing ferroalloys in a submerged arc furnace,the depth of the electrode inserted into the reaction pool charge has a great influence on the whole reaction process and production efficiency.The electrode slipping device of the submerged arc furnace is a special equipment for the electrode insert and pull action,which mainly relies on hydraulic cylinders for action.When the electrode slipping device performs the action,because each hydraulic cylinder mainly relies on the experience of workers on site to complete,which leads to the insert and pull of the electrode is not timely and the position error is large,thus affecting the production efficiency and making the enterprise suffer losses.Therefore,in this paper,we simulate the insert and pull process of the electrode slipping device for submerged arc furnace.After verifying that the simulation results are consistent with the actual,the control system is optimized on this basis,a fuzzy PID control algorithm is designed,and a current-position model is used,the system can move the electrode insert and pull according to the current level,and finally the system before and after optimization is compared and analyzed.This dissertation are organized as follows:Firstly,the composition of the submerged arc furnace system is analyzed and the electrical characteristics are studied.By building a two-dimensional and threedimensional model of the submerged arc furnace electrode slipping device,the system composition,working process and principle of the submerged arc furnace electrode slipping device are analyzed to lay the foundation for the virtual prototype modeling of the slipping device later.After simplifying the electrical circuit model from the submerged arc furnace state schematic diagram,the current-position model of the electrode is established by using the least squares method,and the validity of the model is verified by model identification.Then,the mechanical system model and the hydraulic system model of the electrode slipping device of the submerged arc furnace are built respectively.After that,the working pressure of the hydraulic system and the parameters of the hydraulic cylinder are calculated and selected,and the hydraulic system model is built according to the hydraulic schematic diagram using AMESim software to prepare for the joint simulation of the electrode slipping device.Thirdly,the joint simulation of the electrode slipping device of the submerged arc furnace was carried out.The AMESim software was used as the main simulation platform to analyze the motion and force of the hydraulic cylinders of the electrode slipping device of the submerged arc furnace through the joint simulation,and the simulation results were compared with the actual situation on site to verify the reasonableness of the joint simulation results.Finally,the control system of the electrode slipping device of the submerged arc furnace is optimized and the electro-hydraulic joint simulation is carried out.Based on the validation of the correct machine-hydraulic joint simulation,an optimized control scheme is proposed for the current problems of the electrode slipping device of the submerged arc furnace.A fuzzy PID controller is designed and applied to the control system of the electrode slipping device of the submerged arc furnace,and a control system that can be driven to insert and pull the electrode according to the current is designed by introducing the validated current-position model.The effect of the optimized control system is examined by means of a combined electro-hydraulic simulation of the electrode slipping device of the submerged arc furnace,and the optimized system is found to be able to achieve the desired goal after analysis and comparison with the pre-optimized control system.