电子限滑差速器电液控制系统特性研究  

Characteristics Research of Electro-hydraulic Control System for Electronic Limited Slip Differential

作　　者：赵彦斌 肖峻[1] 刘志柱 宗书宇 ZHAO Yan-bin;XIAO Jun;LIU Zhi-zhu;ZONG Shu-yu(Mechanical and Electrical Engineering,Wuhan University of Technology,Wuhan,Hubei 430070;Dongfeng Motor Group Co.,Ltd.,Wuhan,Hubei 420100)

机构地区：[1]武汉理工大学机电工程学院,湖北武汉430070 [2]东风汽车集团股份有限公司,湖北武汉420100

出　　处：《液压与气动》2019年第8期63-69,共7页Chinese Hydraulics & Pneumatics

基　　金：湖北省科学技术研究与开发基金(201397289)

摘　　要：以某电子限滑差速器(ELSD)中的电液控制系统为研究对象,分析其电液回路的控制原理及响应特性。根据回路各部件间的机、电、液联动关系,建立系统的数学模型。并运用AMESim/Simulink建模仿真平台,搭建ELSD的液压仿真模型。基于该模型,分析ELSD活塞输出压力与脉宽调制(PWM)信号控制的高速开关阀之间的动态响应关系。研究PWM信号频率、占空比、车轮间转速差及差速器、高速开关阀设计因素对输出油压的影响。通过分析仿真实验结果,提出提高该系统响应速度及控制精度的方法。Taking an electro-hydraulic control system of an electronic limited slip differential(ELSD)as the research object,we analyze control principle and response characteristics of its electro-hydraulic circuit.We establish a mathematical model of the system based on the mechanical,electrical,and hydraulic linkage relationship among various components of the circuit.A hydraulic simulation model of ELSD is built by the AMESim/Simulink platform.Based on the model,the dynamic response relationship between ELSD piston s output pressure and high-speed on-off valve controlled by pulse width modulation(PWM)signal is analyzed.The effects of PWM signal frequency,duty cycle,speed difference of wheels,design factors for differential and high-speed on-off valve on output oil pressure are studied.After analyzing the experimental results,we propose methods to improve response speed and control accuracy of the system.

关 键 词：电液控制系统 高速开关阀 脉宽调制 仿真 精度 

分 类 号：TH137[机械工程—机械制造及自动化] TP271[自动化与计算机技术—检测技术与自动化装置]