The Study On Motion Device’s Modeling And Control Simulation Of Reheating Furnace

Reheating furnace is an important part of iron and steel metallurgical industry, whose main feature is heating the billets on the rolling line according to our process heating requirements. It is very significant and valuable for forecast and research of billets production to establish a practical model of reheating furnace’s motion device. The motion control system of walking-beam furnace which this thesis built simulates the entire production process of reheating furnace. Compared to the traditional reheating furnace experimental system, the system of this thesis is more systematic. So it can simulate reheating furnace production process better and the experiment results possess more validity.Based on the walking beam reheating furnace system, the paper makes a study on modeling, control and simulation of reheating furnace motion device. First of all, power mechanism of reheating furnace is analysised. The mathematical models of hydraulic equipment and electrical motor device are established, which lay a foundation to establish motion device’s model of reheating furnace.Secondly, the paper introduces process engineering of reheating furnace, figures out the main structure of reheating furnace motion device. Mathematical models of hydraulic equipment and electrical motor device are used for establishing the models of charge roll, charge door, charge machine, walking beam, discharge machine, discharge door and discharge roll. Considering different control requirements of each part, pertinent controllers are designed. Then MATLAB simulation is used to verify the accuracy of the models and the effectiveness of the controllers.Finally, simulation research platform of reheating furnace is established. S7-200PLC is used as model carrier. Human-computer interaction is completed through smart700. Parameters that can be modified are set in order to meet different reheating furnace models’ need. The device parameters can be checked and modified on HMI. Simulation run of reheating furnace’s motion device is realized. After IO messages are defined, the simulation platform can be controlled by general PLC. Simulation of reheating furnace’s motion control system can be realized. The research platform for the further study on motion control technology of reheating furnace is provided.