液电混合高能效直线驱动系统控制及仿真分析  

Control and Simulation Analysis of an Energy Efficient Hydraulic-electric Hybrid Linear Driving System

作　　者：郝云晓 夏连鹏 葛磊[1] 李泽鹏 赵斌[1] 权龙[1] HAO Yun-xiao;XIA Lian-peng;GE Lei;LI Ze-peng;ZHAO Bin;QUAN Long(Key Lab of Advanced Transducers and Intelligent Control System of Ministry of Education, Taiyuan University of Technology, Taiyuan, Shanxi 030024)

机构地区：[1]太原理工大学新型传感器与智能控制教育部/山西省重点实验室,山西太原030024

出　　处：《液压与气动》2020年第7期49-54,共6页Chinese Hydraulics & Pneumatics

基　　金：国家自然科学基金(51875385)。

摘　　要：现有电液控制系统为控制液压缸位置,采用比例阀或伺服阀,造成了非常大的节流损失。为改善能效,提出了一种采用电-机械执行器和液压缸的新型液-电混合驱动系统,电-机械执行器用于控制负载运行速度和位置,主要克服惯性力;液压缸主要克服外负载力。为了抑制二者之间的耦合影响,电-机械执行器采用位置闭环控制,并在转矩环补偿干扰力。控制阀主要起液压缸换向作用,节流损失很小,以设定的电-机械直线执行器输出力阈值为基础,通过调节泵压力(液压缸进油压力)或阀开口(液压缸回油压力)控制液压缸输出力。研究结果表明,所提系统具有与阀控缸系统相同高的控制精度,并可大幅减小节流损失。与阀控缸系统相比,液电混合驱动系统能效提升了43.1%。The existing electro-hydraulic system uses proportional valve or servo valve to control the position of hydraulic cylinder;resulting in very large throttling loss.In order to improve energy efficiency;a novel hydraulic-electric hybrid drive system using electro-mechanical linear actuator and hydraulic cylinder is proposed.The electro-mechanical linear actuator is used to control the operation speed and position of the load;and mainly overcome inertia force.The hydraulic cylinder is mainly used to overcome external load force.To suppress the coupling effect between the electro-mechanical linear actuator and hydraulic cylinder;the electro-mechanical actuator adopts a position closed-loop control method and compensates the interference force in the torque loop.The control valve is mainly used for changing the operation direction of the hydraulic cylinder with small throttling loss.Based on the set output force threshold of the electro-mechanical linear actuator;the output force of the hydraulic cylinder is controlled by adjusting the pump pressure(hydraulic cylinder inlet pressure)or the valve opening(hydraulic cylinder back pressure).The simulation results show that the proposed system has the same high control accuracy as that of the valve controlled system;and can greatly reduce the throttling loss.Compared with the valve controlled system;the proposed system's energy efficiency can be improved by 43.1%.

关 键 词：电液控制系统 液电混合驱动 阀控缸系统 节能 

分 类 号：TH137[机械工程—机械制造及自动化]