锻压技术

基于SIMULINK的阀控液压缸运行稳定性建模与仿真分析

英文标题：Modeling and simulation analysis on operation stability of valve controlled hydraulic cylinder based on SIMULINK

作者：韩晨升温少飞赖成

关键词：阀控液压缸液压系统动态特性稳态特性频率特性 MATLAB/SIMULINK

分类号：TP39

出版年,卷(期):页码：2017,42(1):82-85

摘要：

在分析阀控液压缸系统工作原理的基础上，应用流量和力平衡方程，建立了锻压机构工作过程中阀控三位四通单活塞液压缸系统的数学模型，在MATLAB/SIMULINK计算机软件平台上进行了仿真计算，分析系统的稳态特性、动态特性以及频率特性。结果表明：三位四通阀控液压缸在运行过程中出现振荡和超调，并且随着时间的推移系统处于稳定状态，稳态误差为0，系统的响应速度较快，上升时间约为0.4 s，调节时间约为0.55 s，相位裕度约为86.7°，幅值裕度约为29.2 dB，为系统结构参数的优化提供了必要的理论依据；冲击末速度约为6.22 m·s-1，回程最大速度为1.13 m·s-1，增加了阀控液压缸对活塞伸出的助推作用和对回缩的缓冲作用。

Based on the analysis of valve-controlled hydraulic cylinder system, a mathematical model of single piston hydraulic cylinder (three position and four-way) system in the forging was established by flow and force balance equation and simulated by the MATLAB/SIMULINK software platform, and the stability characteristics, dynamic characteristics and frequency characteristics of the system were analyzed accordingly. The results show that the oscillation and overshoot of valve-controlled hydraulic cylinder appear in the running process, and the system is in stable state as time goes on. Therefore, the steady-state error is zero, and the system response speed is faster with the passing time about 0.4 s, adjusting time about 0.55 s, phase margin about 86.7 ° and amplitude margin about 29.2 dB to provide a necessary theoretical basis for the optimization of system structure parameters. Thus, the pushing effect of valve-controlled hydraulic cylinder on piston extension and the cushioning effect on piston retraction are improved by the valve-controlled hydraulic cylinder with the impact end speed at 6.22 m·s-1 and the return maximum speed at 1.13 m·s-1.

基金项目：

山西省自然科学基金资助项目（20140321014-02）

韩晨升(1971-)，男，硕士，讲师 E-mail：wswang222@126.com

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