Research On Hydraulic Synchronization Control Of Four-cylinder Systems For Sector Section Of Continuous Casting

With the development of industrialization and modernization,China has become the largest steel producer and consumer in the world. The Enterprises's Steel demand is more larger and quality demand is higher at the same time. This task researched hydraulic synchronization control of four-cylinder systems based on the sector section roll gap of continuous casting which is the key problems in science and technology of one steel compony.Servo system used to improve the position control system accuracy and responsiveness.At the begining of text,it makes a summarize about the development of continuous casting technology. And then by the analysis of fan-shaped structure above, the valve-controlled nonsymmetrical hydraulic cylinder system is adopted. After some assumptions, the valve-controlled nonsymmetrical hydraulic cylinder math model is built and solving parameters of the system. Based on math model, simulation of four-cylinder synchronization without controller is made by MATLAB/Simulink module tool. Then make a expatiation about PID controller and fuzzy controller. Simulation of four-cylinder,s movement which under PID control strategy is made.To overcome the limitation of PID control appeared in the analysis result,a new kind of strategy is designed to control the hydraulic system using fuzzy-PID complex controller method.Simulation results show that Four-cylinder's movement have reached synchronization while synchronization error in the range of allowable values which is 1%.At the same time, when the system by the larger external shocks, four-cylinder can be quickly synchronized to upgrade and protect the hydraulic system from damage,so it reachs the design requirements.