基于运动学橡胶衬套对独立后悬架性能影响

Performance Influence of Rubber Bushings on Rear Independent Suspension Based on Kinematics

利用空间机构运动学和数值计算方法建立刚性连接的H臂型独立后悬架系统,分析不考虑衬套特性的悬架性能参数;简化衬套为线弹性模型,建立含衬套特性的悬架数学模型,并改变衬套刚度,利用MATLAB计算,对比分析悬架参数变化。理论计算表明,衬套刚度对悬架的操纵稳定性有一定影响,可通过适当的增加衬套的刚度,从而增加悬架的操纵稳定性。利用ADAMS/CAR建立仿真虚拟样机,仿真结果验证了数学模型的准确性。研究结果为悬架衬套的优化设计提供了参考。

The H-arm-independent-rear suspension system of rigid connection is made using space agency kinematics and numerical calculation method,and the suspension’s performance parameters without the characteristics of bushings is analysed.The mathematical model of the suspension with the linear elastic bushings is established,and the variation of the suspension’s parameter is analysed by the MATLAB when the stiffness of bushings is changed.The theoretical results show that the stiffness of bushings has a certain influence on the stability of the suspension,which can be improved by properly increasing the stiffness of the bushings.The virtual prototype is built by ADAMS/CAR,and the simulated results verify the accuracy of the mathematical model.The investigation provides an important reference for the bushings’design.