互联式空气悬架动态特性试验研究

Experimental Study on the Dynamic Performance of Pneumatically Interlinked Air Suspension

将传统空气悬架的空气弹簧通过管路互联，使空气弹簧间可以进行气体交换，构成互联式空气悬架。空气弹簧的互联改变了悬架的刚度，通过合理地控制可进一步提高空气悬架的性能。先分析互联式空气悬架的结构与工作机理，然后搭建其半实物模型及其动态特性测试系统。试验结果表明，空气悬架的“侧向互联”可降低簧上质量在中频段（5～9Hz）的垂向加速度、车身侧倾角与质心附近的侧倾角加速度；但使得该频段内的悬架动行程增加。当振幅较小时，互联式空气悬架对车辆性能各项指标的改善变弱。在分析试验结果的基础上，总结了互联式空气悬架在设计过程中需要遵循的规律，得到的相关结论将为互联式空气悬架的设计和应用提供理论参考。

Air springs of traditional air suspension are interlinked, which constructs the structure of interlinked air suspension. Interconnection of air springs changes the stiffness of air suspension and influences its performance, which provides a way for improvement via appropriate control of interlink. The structure and working principle of in- terconnected air suspension is analyzed, and the prototype vehicle with such suspension and its testing system are established. Experimental results reveal that lateral interlink of air suspension significantly reduces the vertical acceleration of sprung mass, body roll angle and roll acceleration in intermediate frequency （5 -9 Hz） , while makes the dynamic suspension deflection larger. And for small road excitation, interlinked air suspension shows less improvement for vehicle performance compared with large road excitation. Through the analysis of testing results, the design principles of Interlinked Air Suspension are summarized, which can be used as foundation of the design and application of Interlinked Air Suspension.