非对称轴向柱塞泵变排量控制特性分析
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摘要
非对称轴向柱塞泵直接闭式控制单出杆液压缸系统具有结构紧凑、能效高和噪声低的优势,其排量控制特性直接影响泵控系统运行特性。基于此,提出基于斜盘摆角位移反馈的排量控制方案,根据电液比例排量调节工作原理,考虑弹性负载刚度及外负载力干扰的影响,建立了非对称轴向柱塞泵的变排量控制系统模型。通过MATLAB/Simulink仿真分析了不同活塞直径、负载刚度、斜盘摆角、负载压力对泵的出口流量动态特性的影响。仿真结果表明,减小液压缸活塞直径、增大负载刚度可以加快响应速度;增大负载压力可以提高响应稳定性。通过实验验证了仿真结果正确性,实验表明非对称泵的变排量工作性能稳定可靠。
Asymmetric axial piston pump direct control differential cylinder closed loop system has the advantages of compact structure,high energy efficiency and low noise,and the displacement control characteristics directly affect the pump control system operating characteristics. In view of this situation,an inclined plate pendulum angular displacement feedback control scheme is proposed. According to the working principle of electro-hydraulic proportional displacement adjust,the dynamic parameters of elastic load stiffness and the interference of arbitrary external load,the MATLAB / Simulink is used to simulate and analyze the main factors that influence the dynamic characteristics of the displacement control system,such as different piston diameter,load stiffness,inclined angle and load pressure.The simulation results show that increasing the load damping,decreasing the hydraulic cylinder piston diameter can improve the response speed; increasing the load pressure can improve the response stability. The experimental results show that the asymmetric pump works stable and the performance is reliable.
Asymmetric axial piston pump direct control differential cylinder closed loop system has the advantages of compact structure,high energy efficiency and low noise,and the displacement control characteristics directly affect the pump control system operating characteristics. In view of this situation,an inclined plate pendulum angular displacement feedback control scheme is proposed. According to the working principle of electro-hydraulic proportional displacement adjust,the dynamic parameters of elastic load stiffness and the interference of arbitrary external load,the MATLAB / Simulink is used to simulate and analyze the main factors that influence the dynamic characteristics of the displacement control system,such as different piston diameter,load stiffness,inclined angle and load pressure.The simulation results show that increasing the load damping,decreasing the hydraulic cylinder piston diameter can improve the response speed; increasing the load pressure can improve the response stability. The experimental results show that the asymmetric pump works stable and the performance is reliable.
引文
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[14]王春行.液压控制系统[M].北京:机械工业出版,1999.WANG Chunxing.Hydraulic Control System[M].Beijing:China Machine Press,1999.
[2]LODEWYKS J.Der Differentialzylinder im Geschlossenen Hydrostatischen Kreislauf[D].Dissertation,RWTH Aachen,Germany,1994,42(6):425-440.
[3]FEUSER A,DANTLGRABER J,SPAHN D,et al.Servopumpenantriebe fur Differentialzylinder[J].Olhydraulik und Pneumatik,1995,39(7):540-545.
[4]JORG G,IVANTYSYNOVS M.Model Adaptation for Robust Design of Hydraulic Joint Servo Actuators[C]//The4th International Fluid Power Conference,Wuhan,China,2003,36(11):16-24.
[5]HUANG Jiahai,ZHAO Hu,QUAN Long,et al.Development of an Asymmetric Axial Piston Pump for Displacement Controlled System[J].Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science,2014,228(8):1418-1430.
[6]杨阳,权龙,杨敬.轴向柱塞泵非止点配流窗口过渡区压力脉动特性分析[J].机械工程学报,2011,47(24):128-134.YANG Yang,QUAN Long,YANG Jing.Pressure Pulsation Characteristic Analysis of the Non-dead Spots Transition Zone Between Flow Distribution Windows of Axial Piston Pump[J].Chinese Journal of Mechanical Engineering,2011,47(24):128-134.
[7]赵虎,张红娟,权龙,等.非对称泵控差动缸速度伺服系统特性[J].机械工程学报,2013,49(22):170-176.ZHAO hu,ZHANG Hongjuan,QUAN Long,et al.Characteristics of Asymmetrical Pump Controlled Differential Cylinder Speed Servo System[J].Chinese Journal of Mechanical Engineering,2013,49(22):170-176.
[8]张红娟,权龙,李斌.永磁同步电动机直驱泵控差动缸位置伺服系统性能研究[J].中国电机工程学报,2010,30(24):107-112.ZHANG Hongjuan,QUAN Long,LI Bin.Performance of Differential Cylinder Position Servo System Controlled by Permanent Magnet Synchronous Motor Driven Pump[J].Proceedings of CSEE,2010,30(24):107-112.
[9]柏艳红,陈聪,孙志毅,等.基于AMESim的电液阀控缸系统线性化分析[J].系统仿真学报,2014,26(7):1430-1434.BAI Yanhong,CHEN Cong,SUN Zhiyi,et al.Linear Analysis of Electro-hydraulic Valve-controlled Cylinder System Based on AMESim[J].Journal of System Simulaton,2014,26(7):1430-1434.
[10]左岗永.单活塞杆液压缸动态性能参数影响因素的研究[J].机床与液压,2015,43(4):105-107.ZUO Gangyong.Research on Impacted Factors to Dynamic Performance Parameters of Single Piston Rod Hydraulic Cylinder[J].Machine Tool&Hydraulics,2015,43(4):105-107.
[11]张锐,李长春,杨雪松.阀控液压伺服系统的辨识与优化设计研究[J].液压气动与密封,2014,6(3):19-22.ZHANG Rui,LI Changchun,YANG Xuesong.Research on Identification and Optimal Design of Valve-controlled Hydraulic Servo System[J].Hydraulics Pneumatics&Seals,2014,6(3):19-22.
[12]钱阳辉,陈冰冰.基于电液比例阀控缸位置系统控制策略的研究[J].液压与气动,2012,30(7):103-105.QIAN Yanghui,CHEN Bingbing.Research of Control Strategy Based on the Electro-hydraulic Proportion Position Control System[J].Chinese Hydraulics&Pneumatics,2012,30(7):103-105.
[13]秦彦凯.电液比例变排量轴向柱塞泵控制特性研究[D].太原:太原理工大学,2012.QIN Yankai.Research on the Control Characteristics of Electro-hydraulic Proportional Variable Displacement Axial Piston Pump[D].Taiyuan:Taiyuan University of Technology,2012.
[14]王春行.液压控制系统[M].北京:机械工业出版,1999.WANG Chunxing.Hydraulic Control System[M].Beijing:China Machine Press,1999.