基于3-RPC并联机构的车辆座椅减振装置研究  

Research on vibration damping device of vehicle seat based on 3-RPC parallel mechanism

作　　者：张俊红[1] 徐子喻 李德胜[1] 刘海[1] 

机构地区：[1]天津大学内燃机燃烧学国家重点实验室,天津300072

出　　处：《机械设计》2015年第2期26-31,共6页Journal of Machine Design

基　　金：国家高技术研究发展计划(863计划)资助项目(2012AA1117064)

摘　　要：针对车辆座椅存在的多维振动问题,提出一种采用3-RPC并联机构结合减振耗能元件实现多维减振的方法。首先建立减振装置多体动力学模型与数学分析模型,并应用数学模型位移输入-输出关系验证动力学模型的正确性。以动力学模型为基础,研究人-椅系统三垂直轴向加速度传递特性和冲击响应,仿真结果表明系统三轴向共振频率避开了人体敏感频段和车辆悬架及轮胎共振频率;竖直方向最大传递率为1.43,优于固定式座椅(2.08)和机械减振式座椅(1.87),水平方向减振区涵盖了车载环境激励频段,且受冲击作用时系统上平台各轴向加速度和位移峰值明显低于下平台相应值,说明该减振装置对多维稳态振动和冲击激励均具有良好的衰减性能,可显著改善车辆乘坐舒适性。A 3-RPC parallel mechanism with energy dissipation components was constructed to solve the problem of multidimensional vibration of vehicle seat. Firstly, the multi-body dynamic model and the mathematical model of damping device were built and then the correctness of model was verified by displacement relationship.Then, the transfer characteristics of three axial acceleration and impulse-response of the system were studied. The results shows that resonance frequency of the system avoids the sensitive frequency of body and the frequency between vehicle suspension and tire. The maximum acceleration transmissibility in vertical direction is better than the other two kinds of seat, and the device damps horizontal vibration in the frequency range of excitation inside the vehicle. So, the device can damp multidimensional vibration and impulse and improve ride comfort greatly.

关 键 词：车辆座椅 多维减振 传递特性 多体动力学 

分 类 号：TH122[机械工程—机械设计及理论]