基于溢流阀物理模型的电控压力切断控制策略研究  

Electronic Pressure Cut-off Control Strategy Research Based on Physical Modelling of Relief Valve

作　　者：刘彬 赵金光 董兆胜 LIU Bin;ZHAO Jin-guang;DONG Zhao-sheng(Weichai Power Co.,Ltd.,Institute of Advanced Engine Research,Weifang 261061,China)

机构地区：[1]林德液压(中国)有限公司,山东潍坊261061

出　　处：《液压气动与密封》2023年第3期12-16,共5页Hydraulics Pneumatics & Seals

摘　　要：电控压力切断功能可以根据不同的工况模式灵活地改变压力切断的限值,不仅能够有效地保护液压元件,而且能够最大化的起到节能降耗的作用。该文介绍了液压系统当前采用的几种压力切断方法,并在电控挖掘机回转控制中进行了普通PID闭环压力切断控制方法的应用尝试。根据这种控制方法存在的不足,提出了一种基于溢流阀物理模型的压力切断控制策略。在整车上的测试实践证明,基于模型的压力切断控制在保证操控性的前提下,响应更快、节能效果更明显。Electronic pressure cut-off control has the flexibility to change pressure limit value in different working situation,this function can both protect hydraulic components and reduce the fuel consumption of the machine.In this paper,several pressure cut-off methods currently in use are introduced and the common PID close-loop method is used in the control of electronic excavator swing system.On the basis of the shortage of this method,a new control strategy based on physical modelling of relief valve is proposed and it’s advantages is proved during the test on the machine,which are good performance,quicker response and better fuel consumption reduction ability.

关 键 词：电控 压力切断 溢流阀 物理模型 

分 类 号：TH137[机械工程—机械制造及自动化]