连铸机结晶器振动缸动态分析

Dynamic analysis on mould oscillation cylinder of continuous casting machine

结晶器是连铸机的核心设备,结晶器的振动可以防止结晶器壁发生黏结。对1套将伺服阀内置于步进缸的振动油缸系统进行了动态特性分析,运用传递函数法对整个振动油缸系统建模,计算了系统的传递函数,建立系统传递函数方框图;根据振动油缸的数学模型,搭建基于MATLAB/Simulink软件的非线性数值仿真模型;根据建立的仿真模型对系统进行仿真分析,分析了系统的阶跃响应以及跟踪响应。运用PID控制器对振动油缸系统进行了控制调节,使得系统响应时间从0.60 s减少到0.25 s。

Mould is the core equipment of a continuous casting machine, and mould oscillation can prevent adhesion on its wall. This paper analyzed the dynamic characteristics of the oscillation cylinder system that puts servo valves inside the step cylinder. A model of the oscillation oil cylinder was built by means of the transfer function method, the system transfer function was calculated, and a block diagram of the transfer function was thus established. According to the mathematical model of the oscillation cylinder, a nonlinear numerical simulation model was built by means of MATLAB/ Simulink software, and based on the simulation model, simulation analysis was conducted to analyze the step response and tracking response of the system. A PID controller was used to control and adjust the oscillation oil cylinder system, and as a result, the system response time was reduced from 0.60 sto0.25 s.