Design Of The Mold Level Control System Of Continuous Casting Machine

Mold level control system involves many realms which include sensor technique, information processing technique, computer control technique and so on. This article discourses upon the mold level control system of R10-4-4 profiled billet continuous casting machine of Shanxi Changzhi steel and iron group joint-stock limited liability company.Firstly, the paper determines to use the eddy current detection technology and the advanced servo electric cylinder technology to realize the closed loop automatic control of mold molten steel level, on the basis of comparing mode and characteristic of each constituent part of the mold level control system. For the hardware design, it completes choice of each constituent part of mold level control system, and uses the bus bridge technology to solve communication problem of different network between SIEMENS PLC and the third party instrument. For the software design of rock-bottom machine, it uses 10 point smoothness average filter algorithm to filter periodic jamming of the Crystallizer form molten steel level signal, the degree of smoothness is high, and this way also avoids large undulation of molten steel level; It realizes communication of different network through the GSD file compilation , configuration , programming of bus bridge, it uses the mature PI control algorithm to realize mold level closed-loop control; for the software design of top machine, it completes the WinCC software design, and extends special functions of top machine by using C script for facilitating the management and operation.In this paper, it also establishes mathematical model of each constituent part according to the mechanism of mold level control system, carries on the simulation experiment for conventional PI, partitioned PI and fuzzy control algorithm by using the Simulink tool, the comparison and analysis of simulation results lays the foundation on improvement of the mold level control algorithm.Finally, it carries on the demarcation experiment of eddy current sensor and response performance experiment of electrical cylinder. Under the laboratory condition, the control system response performance is normal.