摘要
针对于被动式减振器无法调和汽车运动性和舒适性之间的矛盾,建立了可用于重载环境的挤压模式磁流变弹性体减振单元,并利用等效模型和两自由度模型对1/4单轮进行动力学特性和振动特性分析。结果表明:在外加电流下,磁场强度在(300~450)mT之间时,位移均方根值可迅速衰减到13mm;磁场强度在(450~600)mT之间时,位移均方根值可迅速衰减到7.5mm,完成一个周期后,加权加速度均方根值衰减到270mm/s^(2);进一步仿真得到不同车速下的均方根值,可知,压缩状态下在(60~100)km/h速度段,电流为1.27A-1.7A时加速度均方根值衰减迅速;伸张状态下在(40~80)km/h速度段,施加电流为1.7A时加速度均方根值衰减迅速。通过仿真得到磁流变弹性体减振单元最优控制参数,这为控制系统设计及减振单元结构布置提供了理论基础。
In view of the contradiction between vehicle mobility and comfort that passive shock absorbers cannot reconcile,an extruded magnetorheological elastomer shock absorbers is established for heavy load condition. The results show that under the applied current,when the magnetic field intensity is between 300 and 450mT,the RMS value of displacement can rapidly decay to13mm. When the magnetic field intensity is between(450~600)mT,the RMS value of displacement can rapidly decay to 7.5mm.After one cycle,the RMSVA is decay to 270mm/s^(2). The RMS values at different speeds is further simulated,and it shows that the RMSVA is decay rapidly when the current is 1.27A-1.7A in the speed section(60~100)km/h under compression state. In the(40~80)km/h speed section under stretch state,when the applied current is 1.7A,the RMSVA is decay rapidly. The optimal control parameters of magnetorheological elastomer damping unit are obtained through simulation,which provides a theoretical basis for the design of control system and structural layout of damping unit.
作者
王磊
李长河
贾东洲
牛绍全
WANG Lei;LI Chang-he;JIA Dong-zhou;NIU Shao-quan(VOSS Automotive Components(Jinan)Co.,Ltd.,Shandong Ji'nan 250000,China;School of Mechanical Engineering,Qingdao University of Technology,Shandong Qingdao 266520,China;School of Mechanical Engineering,Inner Mongolia University for Nationalities,Inner Mongolia Tongliao 028000,China)
出处
《机械设计与制造》
北大核心
2022年第5期138-142,146,共6页
Machinery Design & Manufacture
基金
国家自然科学基金(51575290)
内蒙古民族大学自然科学研究项目(NMDYB18018)。
关键词
减振单元
磁流变弹性体
磁场强度
位移均方根
加速度均方根
控制参数
Damping Element
Magnetorheological Elastomer
Magnetic Field Intensity
RMS
RMSVA
Optimal Control Parameters
