| Mold is very important equipment of steel-making techniques in modern iron and steel enterprise, and an oscillation device is needed in order to ensure that continuous casting production runs successfully. The mechanical oscillating instrument driven by the eccentric wheel is no longer satisfied with the rhythm of production and the technology.Computer-controlled electro-hydraulic servo mold oscillation system can facilitate the emergence of various rules, the process of achieving control supervision. The continuous casting process automation is achieved, according to casting speed real-time changes vibration parameters which is also the development direction of mold oscillation.The oscillation of continuous casting mold is an important factor that has effect on casting production. The oscillation of continuous casting mold has experienced four kinds: Synchronism,Negative slide,Sinusoidal and Non-sinusoidal oscillation. Non-sinusoidal oscillation has the characters that the upward time of the continuous casting mold is longer than the downward time.It can reduce the friction between the mold wall and the strand surface,and prevents the strand from leaking and cracking,it can also improve the surface quality of slabs.The aim in this article is to study the hydraulic servo system that drives continuous casting mold. According to a given design units of equipment, hydraulic object model, control rule on the mold oscillation device is designed. It also gives the two hydraulic cylinder synchronization scheme and synchronization control algorithm. In addition, a friction dynamic model and a friction compensate based on this model has established. It is applied in the oscillation system for continuous casting mold.The article also analyses the stability and steady-state error. The dynamiccharacteristic simulation and experimental study in this foundation for the system has been carried on by Dynamic system simulation toolbox SIMULINK which provided through MATLAB. |
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