Abstract: In order to study the outstanding advantages of air spring in semi-active suspension, as well as the optimization strategy of air spring, this paper based on the vehicle dynamics model of a mature vehicle, firstly, establishes the damper control algorithm of skyhook damping control strategy, then establishes the corresponding air spring model. Secondly, according to the characteristics of the air spring, the reference stiffness of the air spring under different load conditions is designed, and comprehensively considered the suspension isolation performance and suspension impact performance to optimize the stiffness of air spring. Finally, the effectiveness of the optimization scheme is verified through simulation comparison with the basic passive suspension model. The result shows that under half load and full load conditions, the suspension isolation performance is improved by about 19.78% and 28.92% on cobblestone roads, and by about 15.12% and 21.52% on Belgian roads, the suspension impact performance is improved by about 54.55% and 60%. This research method is closely related to the engineering development and application of air springs, and can effectively reduce the development cycle and cost of air springs.

Key words: Air spring; Suspension vibration isolation; Suspension impact resistance; Stiffness optimization

摘要： 为研究空气弹簧在半主动悬架中的突出优势以及空气弹簧的优化策略，文章基于某成 熟车型的整车动力学模型，首先建立天棚阻尼控制策略的阻尼控制算法，再搭建相应的空气 弹簧模型；其次，根据空气弹簧的特性进行不同载荷状态下的空气弹簧基准刚度设计，并结 合悬架隔振性能和悬架冲击性能对空气弹簧刚度进行优化；最后，通过与基础被动悬架车型 的仿真结果对比，验证了优化方案的有效性。结果表明，半载和满载状态下，悬架隔振性能 在鹅卵石路面提升分别约 19.78%和 28.92%，在比利时路面提升分别约 15.12%和 21.52%，悬 架冲击性能提升分别约 54.55%和 60%。该研究方法与空气弹簧的工程开发和应用较为贴合， 可有效降低空气弹簧的开发周期及成本。

关键词: 空气弹簧；悬架隔振性；悬架冲击性；刚度优化