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首先建立非对称三位四通阀控制非对称液压缸动态数学模型,然后用MATLAB中Simulink构建了某热连轧机液压压下系统的仿真模型并对其动力学特性进行了仿真研究;通过改变轧制不同带钢厚度变化时获得液压缸位移输出曲线。最后对比现场实测位移曲线,可以看出仿真结果与现场实测基本吻合,说明动态数学模型基本正确,同时表明计算机仿真是研究液压压下动态特性的有效途径。
First of all, the asymmetric three-position four-way valve was established to control the dynamic mathematical model of asymmetric hydraulic cylinder. Then, the simulation model of the hydraulic system of a hot strip mill was established by Simulink in MATLAB and its dynamic characteristics were simulated. System of different strip thickness obtained when the hydraulic cylinder displacement output curve. Finally, compared with the field measured displacement curve, it can be seen that the simulation results are in good agreement with the field measurements, indicating that the dynamic mathematical model is basically correct. Simultaneously, it is shown that computer simulation is an effective way to study the dynamic characteristics of hydraulic depressurization.