【作者】 王珺；

【导师】 吴晓明；

【作者基本信息】 燕山大学 ， 机械电子工程， 2007， 硕士

【摘要】 在现代钢铁企业中,结晶器是炼钢工艺的关键设备,同时为了保证连铸生产的顺利进行,需要通过一个振动装置使结晶器按一定的规律振动。原来由偏心轮驱动四连杆机构的机械振动装置已经无法满足生产节奏和工艺的要求。由计算机控制的电液伺服结晶器振动系统,可以方便的产生各种规律,实现控制过程监督,并根据拉坯速度实时修改振动参数,从而实现连铸过程的自动化,是结晶器振动系统的发展方向。连铸结晶器的振动是影响连铸生产的重要因素,它主要分为四种方式:同步式振动、负滑动式振动,正弦振动和非正弦振动。其中非正弦振动具有上升运动时间比下降运动时间长的特点,能减小结晶器与坯壳之间的摩擦力,防止坯壳的拉漏和拉裂,改善钢坯的表面质量。本文旨在研究驱动结晶器振动的液压伺服控制系统。首先根据某设计单位给出的设备,液压控制系统的对象模型,对该结晶器振动装置的控制律进行了设计。并且给出了两个液压缸的同步方案和同步控制算法。此外还建立了一个摩擦动态模型和基于此模型的摩擦的补偿方案,并将其应用在连铸结晶器振动系统中。本文还通过数学模型对系统的稳定性和稳态误差进行了详细的分析。通过MATLAB所提供的动态系统仿真工具箱SIMULINK对系统进行了动态特性仿真和实验研究。更多还原

【Abstract】 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.更多还原