液压混动系统泵排量控制研究  

Research on Pump Displacement Control of Hydraulic Hybrid System

作　　者：曾小华[1] 刘持林 李文远[1] 宋大凤[1] 李立鑫[1] 陈存福 ZENG Xiaohua;LIU Chilin;LI Wenyuan;SONG Dafeng;LI Lixin;CHEN Cunfu、(State Key Laboratory of Automotive Simulation and Control,Jilin University,Changchun 130025,China;FAWJiefang,Automotive Co Ltd,Qingdao 266043,China)

机构地区：[1]吉林大学汽车仿真与控制国家重点实验室,吉林长春130025 [2]一汽解放青岛汽车有限公司,山东青岛266043

出　　处：《湖南大学学报（自然科学版）》2019年第4期25-33,共9页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(51675214;51575221);山东省重点研发计划项目(2017CXGC0510)~~

摘　　要：针对闭式液压回路中变量泵排量控制方法精度较低的问题展开研究,基于泵控系统中伺服阀的脉宽调制(PWM)控制,推导出占空比信号与变量泵排量的线性关系,在AMESim软件平台上搭建了泵控系统仿真模型,并基于试验测试数据对模型进行校核,基于泵控系统模型提出了PID反馈控制、前馈+反馈控制和三步法控制的泵排量控制方法,并进行测试对比分析.仿真结果表明,三步法控制在动态响应及快速稳定方面优于PID反馈控制,相比于前馈+反馈控制,采用三步法控制的泵排量动态响应误差减少了35.5%.This paper studied the problem of low precision for variable pump displacement control method of closed hydraulic circuit.The linear relationship between the duty cycle signal and displacement of pump was derived based on the pulse width modulation(PWM)control of the servo valve for the pump control system.The simulation model of the pump control system was built on the AMESim software platform,and the model was verified by comparing with the test data.Based on the pump control system model,the PID feedback control,feedforward + feedback control,and three-step control of pump displacement were proposed,and an analysis was performed.Simulation result shows that the three-step control is superior to PID feedback control in dynamic response and rapid stability.When compared with the feedforward + feedback control,the dynamic response error of the pump displacement controlled by the three-step method is reduced by 35.5%.

关 键 词：占空比信号 泵控系统 PID控制 前馈+反馈控制 三步法控制 

分 类 号：U469.72[机械工程—车辆工程]