摘要
受限于成本原因,电控液压制动系统中多使用高速开关阀,但在液压阀开关控制中电磁阀的敲击噪声、液压冲击噪声和压力波动造成制动控制品质和精度劣化,因此通过脉冲宽度调制控制实现高速开关阀线性化调控性能是此类高速开关阀的设计关键。高速开关阀动态运动特性受瞬态液动力、非线性电磁力与机械惯性、弹簧力综合作用,电磁阀动力学特性决定其线性调控工作范围窄,需要系统设计电磁阀系列结构力学参数,才能实现电磁阀阀口一定开度范围内的多种非线性力的线性化变化。为此,建立高速开关阀与液压控制单元的动力学模型与联合仿真模型,通过仿真与试验验证,分析出阀座锥角、节流孔径、气隙大小等结构参数对电磁阀线性特性的影响。从而设计出合理的电磁阀结构参数,并应用于一款液压控制回路中,实现线性工作范围的拓宽,满足汽车制动安全控制的要求。
Limited by the cost,high-speed on-off valves are often used in the electro-hydraulic braking system.However,the knocking noise of the solenoid valve,hydraulic impact noise and pressure fluctuation in the switch control of the hydraulic valve lead to the quality and precision of brake control to deteriorate.Therefore,the key to the design of the high-speed on-off valve is to realize the linearization by pulse width modulation(PWM)control.The dynamic characteristics of high-speed on-off valve are affected by transient flow force,nonlinear electromagnetic force,mechanical inertia and spring force.Therefore,the dynamic model and joint simulation model of high-speed on-off valve and hydraulic control unit(HCU)are established.Through simulation and experimental verification,the influence of structural parameters such as poppet angle,orifice diameter,air gap size on the linear characteristics of solenoid valve is analyzed.The reasonable structure parameters of the solenoid valve are designed and applied to a hydraulic control circuit to widen the linear working range and meet the requirements of automobile braking safety control.
作者
穆洪远
程硕
李凯
李亮
潘盼
赵洵
MU Hongyuan;CHENG Shuo;LI Kai;LI Liang;PAN Pan;ZHAO Xun(State Key Laboratory of Automotive Safety and Energy,Tsinghua University,Beijing 100084;Beijing Electric Vehicle Co.,Ltd.,Beijing 100176)
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2021年第22期247-254,共8页
Journal of Mechanical Engineering
基金
国家自然科学基金(52002213)
山东省重点研发(2019TSLH701)
安徽省新能源汽车暨智能网联汽车产业技术创新工程(JAC2019022505)资助项目
关键词
高速开关阀
脉冲宽度调制
占空比
线性调节
high-speed on-off valve
pulse width modulation
duty cycle
linear regulation
