基于阀控缸电液系统的前馈-反馈联合控制策略研究  

Research on Feedforward-Feedback Joint Control Strategy Based on Valve-Controlled Cylinder Electro-Hydraulic System

作　　者：王大卫 王思民 丁海港[1,3] 弓智强 庞智珍 李亚龙 WANG Dawei;WANG Simin;DING Haigang;GONG Zhiqiang;PANG Zhizhen;LI Yalong(School of Mechanical and Electrical Engineering,China University of Mining and Technology,Xuzhou Jiangsu 221116,China;Shanghai Hunter Hydraulic Control Technology Co.,Ltd.,Shanghai 201612,China;Jiangsu Province and Education Ministry Co-Sponsored Collaborative Innovation Center of Intelligent Mining Equipment,Xuzhou Jiangsu 221116,China)

机构地区：[1]中国矿业大学机电工程学院,江苏徐州221116 [2]上海衡拓液压控制技术有限公司,上海201612 [3]江苏省矿山智能采掘装备协同创新中心(省部共建),江苏徐州221116

出　　处：《机床与液压》2024年第13期7-14,共8页Machine Tool & Hydraulics

基　　金：国家自然科学基金面上项目(52075534);江苏省自然科学基金项目(BK20221544)。

摘　　要：阀控缸电液系统应用广泛,提高其响应速度、控制精度与可靠性具有重要意义。传统闭环控制基于反馈误差调节,控制简单、稳定性好、易用于复杂系统,但存在时滞与稳定性问题;前馈控制作为一种开环控制方式,具有响应快、无时滞的优点,但控制效果依赖模型精度。针对上述问题,提出一种基于阀控缸电液系统的前馈-反馈联合控制策略,建立其数学模型,运用AMESim软件搭建仿真模型并进行可行性分析,通过实验建立伺服阀流量-压差-电压前馈参数表,最后基于Simulink建立变转速恒压油源实验平台并进行实验验证。仿真及实验结果表明:前馈-反馈联合控制可提高阀控缸电液系统的控制精度和响应性,相较于反馈控制方式跟踪精度提高45%,具有良好的综合控制效果。Valve-controlled cylinder electro-hydraulic system is widely used,and it is important to improve the response,control accuracy and reliability of the system.Traditional closed-loop control is based on feedback error control,which is simple to control,has good stability,and easy to use in complex systems,but there are problems of time lag and stability.As an open-loop control method,feedforward control has the advantages of fast response and no time lag,but the control effect depends on the accuracy of the model.In order to solve the above problems,a feedforward-feedback joint control strategy based on the electro-hydraulic system of valve-con-trolled cylinder was proposed,and mathematical model of the system was established,the simulation model of the system was built by using AMESim software and the feasibility analysis was carried out;a parameter table of servo valve flow-differential pressure-voltage feedforward was established by experiments.Finally the experimental platform of variable-speed and constant-pressure oil source was established based on Simulink and verified by experiments.The simulation and experimental results show that the combined feedforward-feedback control can improve the control accuracy and responsiveness of the valve-controlled cylinder electro-hydraulic system,and the tracking accuracy is increased by 45%compared with the feedback control method,which has a good comprehensive control effect.

关 键 词：前馈控制 联合控制 恒压系统 阀控缸 电液系统 

分 类 号：TH137[机械工程—机械制造及自动化]