| 康路路，罗一平，王兆强，刘妍.三自由度汽车座椅及其振动特性研究[J].轻工机械,2017,35(2):20-25 |
| 三自由度汽车座椅及其振动特性研究 |
| 3-DOF Vehicle Seat and Vibration Characteristics Research |
| |
| DOI：10.3969/j.issn.1005-2895.2017.02.005 |
| 中文关键词: 车辆座椅 多自由度振动 耦合度 共振频率 传递率 |
| 英文关键词:vehicle seat multi degree of freedom vibration coupling degree resonance frequency transfer rate |
| 基金项目:国家自然基金项目资助(51505272) |
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| 中文摘要: |
| 为了解决车辆座椅的多自由度振动和乘坐舒适性等问题，设计了一种三自由度并联机构座椅。利用单开链理
论，计算出减振机构的耦合度为l，并用运动输出矩阵验证了三自由度为三平移运动，采用单位力椭球法对椭球圆度的
分析为振动特性仿真分析提供了理论依据。通过支链不同刚度、负载和阻尼时的振动传递特性仿真分析，结果表明：系
统各轴向共振频段远离乘客不舒适频段4 -7 Hz，且在竖直方向上传递率峰值明显优于传统机械式减振座椅；在水平方
向上，当激励在l Hz以上时，传递率趋于零。研究表明该减振座椅能够达到较高的减振标准。 |
| 英文摘要: |
| ln order to solve the problem of the multi dimension vibration and ride comfort of the vehicle seat, a vehicle
seat based on three degree of freedom(3-DOF) parallel mechanism was designed. The calculation result of coupling
degree of vibration reduction mechanism was I which based on the theory of single opened chain. and three degrees of
freedom were verified as three translational motion by using the motion output matrix. The ellipsoidal roundness was
analyzed by using the unit force ellipsoid method, which provided the theoretical foundation for simulation analysis of
vibration characteristic. Simulation analysis of vibration transfer characteristics under the conditions of different stiffness ,
damping and load mass showed that the axial resonance frequency of the system to avoid the human sensitive frequency
band 4 - 7 Hz. and the peak transfer rate was obviously superior to the traditional mechanical vibration seat in the
vertical direction. The transmission rate was tended to zero when the excitation was above I Hz in the horizontal
direction. The results show that the vibration damping seat system has a good effect of vibration reduction. |
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