四通阀控非对称液压缸微分前馈伺服控制方法分析
Analysis of Differential Feedforward Servo Control Method for Four-Way Valve Controlled Asymmetric Hydraulic Cylinder
冯占祥1
作者信息
- 1. 张家口宣化华泰矿冶机械有限公司,张家口 075100
- 折叠
摘要
非对称液压缸的左右两腔有效面积不同,导致其动态特性和控制策略相较于对称液压缸更为复杂,提出四通阀控非对称液压缸微分前馈伺服控制方法.建立四通阀控非对称液压缸的数学模型作为被控对象,设计一个微分前馈控制器应用于伺服系统,根据输入指令和反馈信号实时调整四通阀的开度,实现对非对称液压缸的控制.实验结果表明,设计方法下阀控非对称缸伺服系统跟随响应曲线的滞后时间为 0.024 s,幅值衰减5%,在伺服系统控制要求的允许范围内.
Abstract
Because the effective area of the left and right cavities of the asymmetric hydraulic cylinder is different,the dynamic characteristics and control strategy of the asymmetric hydraulic cylinder are more complicated than that of the symmetrical hydraulic cylinder.The mathematical model of four-way valve controlled asymmetrical hydraulic cylinder is established as the controlled object,and a differential feedforward controller is designed and applied to the servo system.According to the input command and feedback signal,the opening of four-way valve is adjusted in real time to realize the control of asymmetrical hydraulic cylinder.The experimental results show that the hysteresis time of the valve-controlled asymmetric cylinder servo system following the response curve is 0.024 s,and the amplitude attenuation is 5%,which is within the allowable range of the control requirements of the servo system.
关键词
四通阀控液压缸/非对称液压缸/伺服系统/微分前馈控制器Key words
four-way valve controlled hydraulic cylinder/asymmetric hydraulic cylinder/servo system/differential feedforward controller引用本文复制引用
出版年
2024
NETL
NSTL
万方数据