非对称泵控液压系统控制方案及其回路特性仿真分析  

Simulation analysis on control scheme and loop characteristics for asymmetric pump-controlled hydraulic system

作　　者：王海燕 袁荷伟[2] 李峰 张强 Wang Haiyan;Yuan Hewei;Li Feng;Zhang Qiang(Department of Machinery Manufacturing,Hebei Zhuozhou Technician College,Baoding 072750,China;School of Automotive,Henan Vocational and Technical College of Communications,Zhengzhou 450000,China;School of Mechanical Engineering,Hebei University of Science and Technology,Shijiazhuang 050011,China;Henan Ruizhi Hydraulic Equipment Co.,Ltd.,Zhengzhou 450000,China)

机构地区：[1]河北涿州市技师学院机械制造系,河北保定072750 [2]河南交通职业技术学院汽车学院,河南郑州450000 [3]河北科技大学机械工程学院,河北石家庄050011 [4]河南睿智液压设备有限公司,河南郑州450000

出　　处：《锻压技术》2022年第2期162-166,共5页Forging & Stamping Technology

基　　金：河南省高等学校青年骨干教师培养计划项目(2017-GGJS242)。

摘　　要：为了解决闭式泵控系统液压缸流量不匹配问题并提升液压系统的能量效率,设计了一种变排量、变转速的非对称泵控液压系统控制方案。通过综合控制两个自由度来达到调控排量,实现了液压缸伸缩位置与运动速度的控制功能。此时控制转速和控制排量发生叠加,从而获得了更快的系统响应速度。最后,分别从速度开环、闭环控制方案,以及负载特性等方面对非对称泵控液压系统控制方案及其回路特性展开了仿真分析。研究结果表明:速度开环控制回路系统形成了不对称的速度,速度闭环控制回路系统则表现出更稳定的状态,其可以达到更高的位置控制精度,达到平稳运行状态,获得更优位置控制性能;闭环速度可以保持稳定状态,基本不受负载的影响。In order to solve the problem of hydraulic cylinder flow mismatch in closed pump control system and improve the energy efficiency of hydraulic system, a control method of asymmetric pump-controlled hydraulic system with variable displacement and variable rotation speed was designed. Then, through the comprehensive control of two degrees of freedom, the displacement was adjusted, and the control function of telescopic position and movement speed of the hydraulic cylinder was realized. Meanwhile, the control speed and control displacement were overlapped to obtain a faster system response speed. Furthermore, the control scheme and loop characteristics of the asymmetric pump-controlled hydraulic system were simulated and analyzed respectively from the aspects of speed open-loop and closed-loop control schemes and load characteristics. The results show that an asymmetrical speed was formed in the speed open-loop control system, while the speed closed-loop control system exhibits a more stable state to achieve higher position control accuracy and a stable operation state which could obtain better position control performance. The closed-loop speed could keep stable state and is basically not affected by the load.

关 键 词：泵控液压系统 回路特性 液压缸流量 变排量 变转速 

分 类 号：TH137[机械工程—机械制造及自动化]