车辆并联机构座椅三维减振研究

摘要

针对车辆座椅的三维振动,提出采用三平移并联机构作为其主体机构,运动学分析表明在垂直方向具有较大的工作空间,且机构的Jacobian矩阵与垂直位移无关,适合作为车辆三维减振座椅.机构的模态分析结果表明,系统的3个固有频率避开了人体的敏感频率,可以使人体具有较好的乘坐舒适度.最后对系统进行了动态灵敏度分析,确定了系统设计参数对座椅固有频率的影响情况,更好地满足了车辆对座椅动态特性的要求.%A 3-D parallel mechanism was designed to solve the problem of 3-D vibration isolation of vehicle seat. The kinematic analysis of the platform indicated that there was big workspace in vertical direction. The Jacobian matrix was not relative to the vertical displacement, so the parallel mechanism met the need of 3-D vibration isolation of vehicle seat. The results of mode analysis showed that three natural frequency of the 3 -D vibration isolation system could avoid the sensitive frequency of body, and the dynamic sensitivity analysis for the 3-D vibration isolation system discovered the influences of the design parameter to the natural frequency.