The Raising Speed And Simulation Of Hydraulic System Of The3500Mm Medium-Plate Mill Manipulator

The manipulator is an indispensable part of the medium-plate mill, its basic function is to push steel plate to make it in same centerline with rolling mill centerline. Rough mill manipulator makes rolling piece through the mill smoothly, simultaneously it is the rolled-piece width gauge. The manipulator includes push board, transmission device and drive hydraulic cylinder, etc.Tgsteel3500mm medium-plate mill is the1st domestic production and has produced150tons manufacturing production every year. With the accelerating pace of production, push the speed of bed has become the key factor influence rolling cycle, through the technological transformation of the hydraulic system to improve the speed of bed to push, improve product technical content, enhance product market competitiveness is of positive significance.On the basis of the research of development of the Tgsteel3500mm medium-plate mill and its power system, the valve-controlled nonsymmetrical hydraulic cylinder servo system meeting field demand is adopted. The valve-controlled nonsymmetrical hydraulic cylinder math model which differents from the general valve-controlled symmetrical hydraulic servo system model is rebuilt with deducting and solving parameters of the system. Based on the model, the PID control methods and MATLAB/Simulink are introduced. Moreover, the simulation is accomplished. To overcome the limitation of general PID control appeared in the above analysis result. By the simulation results indicated, both two controllers can improve the system’s rapid response and high stability, and the model optimize was also realized. The PID controller based on modified BP neural network is better than the common PID controller.