锻压技术

基于前馈跟踪补偿的电液复合控制方法研究

英文标题：Research on method of electro-hydraulic hybrid control based on feedforward tracking compensation

作者：宋昭许益民

单位：武汉科技大学

分类号：TH137

出版年,卷(期):页码：2015,40(9):87-90

摘要：

为了对金属锻压成形设备中应用广泛的电液位置、压力复合控制过程进行优化，以阀控对顶加载液压缸系统为研究对象，详细分析了电液伺服复合控制系统的工作原理，分别建立了位置控制系统和压力控制系统的数学模型，利用开闭环PID型迭代学习算法不断修正控制输入，并采用一种信号前馈跟踪补偿的控制方法设计了位置-压力复合控制器。仿真结果表明：该方法的运用能有效消除复合控制过程中的冲击电压，实现了执行元件在位置闭环控制与压力闭环控制之间快速、平稳切换，有助于提高主机的控制性能和产品质量。

For the optimization of electro-hydraulic position and pressure hybrid controlling process which are widely used in metal forging equipment, the working principle of electro-hydraulic servo hybrid control system was analyzed and the mathematical models of position & pressure control system were established respectively according to the loaded cylinders system of valve control. The open-closed loop PID iterative learning algorithm was used to correct the control input, and a feedforward tracking compensation method was utilized to design a composite controller. The simulation result shows that the impulse voltage can be eliminated effectively to realize the actuator switching fast and smoothly between position and pressure closed-loop control, which will improve the control performance and quality of the products.

基金项目：

国家自然科学基金资助项目(51275365)

宋昭(1988 - )，男，硕士研究生

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