铝合金厚板轧制设备电液位置伺服系统建模与分析

Modeling and Analysis of the Electro-hydraulic Position Servo System for Rolling Facilities of Aluminum Alloy Thick Plate

为了提高铝合金厚板轧制设备的轧制动力和轧制精度,设计了采用三通阀控非对称液压缸的动力机构,建立了电液位置伺服系统数学模型。分析了常规PID整定系统阶跃响应,及在给定阶跃输入时正向运动下线性和非线性模型阶跃响应及其模型误差。仿真分析表明,所设计的三通阀控非对称液压缸能有效提高轧制设备的轧制动力和轧制精度。

To improve the rolling power and precision of the rolling facilities for aluminium alloy thick plate, the asymmetric three-way valve controlled hydraulic cylinder power mechanism has been designed, and the mathematical model of the electro-hydraulic position servo system is established. The step response of conventional PID tunning system; the step response of linear model and nonlinear model under positive movement upon a given step input, and model errors are analyzed. The simulation analysis shows that the asymmetric three-way valve controlled hydraulic cylinder designed effectively improves the rolling power and precision of the rolling facilities.