摘要
液压系统与电-机械系统是广泛应用于航空航天、工业、非道路移动机械等领域的两种不同驱动方案。在实际中,两者通常单独使用,电-机械驱动方案能效高,但承载能力弱,液压驱动方案功率密度大、动态响应快,但能量效率低。为此,结合两个驱动方案优点,集成设计电-机械执行器与液压缸,构建一种新型液电混合直线驱动系统,分析系统工作原理及两个非相似驱动子系统耦合特性、力纷争现象及其影响。在此基础上,提出一种电-机械驱动单元运动控制与液压驱动单元力控制的调控方案。研究结果表明,采用所提调控方案可减轻两个非相似驱动子系统耦合作用,在液压阀低压损的同时,可获得良好的位置控制特性。新型液电混合直线驱动系统将为液压系统和电-机械系统的进一步发展提供新思路。
Hydraulic system and electro-mechanical system are widely used in aerospace,industry,non-road mobile machinery and other fields.In practice,the two systems are usually used separately.The electro-mechanical drive scheme has high energy efficiency,but poor carry capacity.The hydraulic drive scheme has high power density and fast dynamic response,but low energy efficiency.Therefore,combining the advantages of the two driving scheme,based on the integration design of the hydraulic cylinder and electro-mechanical actuator,a new type hydraulic-electric hybrid linear drive system is constructed.The working principle of the system is introduced.The coupling characteristics,the force dispute phenomenon and its effects of the two non-similar driving subsystems are analyzed.On this basis,a control scheme that electro-mechanical drive unit controls the system motion and hydraulic drive unit controls force is proposed.The research results show that adopting the proposed control scheme can reduce the coupling effect of two non-similar drive subsystems.By using the proposed control scheme,considerable position control performance can be achieved with low pressure loss.The new hybrid linear drive system will provide new ideas for the further development of hydraulic system and electro-mechanical system.
作者
郝云晓
乔舒斐
夏连鹏
权龙
赵斌
HAO Yunxiao;QIAO Shufei;XIA Lianpeng;QUAN Long;ZHAO Bin(Key Laboratory of Advanced Transducers and Intelligent Control System of Ministry of Education and Shanxi Province,Taiyuan University of Technology,Taiyuan 030024)
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2021年第22期386-394,共9页
Journal of Mechanical Engineering
基金
国家自然科学基金资助项目(51875385,U1910211)
关键词
电液控制系统
电-机械执行器
液电混合驱动
位置控制
electro-hydraulic control system
electro-mechanical actuator
hydraulic-electric hybrid drive
position control
