为了探索应用高阶阻抗传递函数进行车辆ISD悬架结构设计时的性能提升效果，本文以双三次型阻抗传递函数作为研究对象，通过筛选应用机电惯容器的车辆ISD悬架的结构特征，利用无源网络综合理论的Foster变换，提出一种高阶阻抗传递函数的降阶转换方法。在四分之一车辆悬架模型的基础上，利用改进的粒子群算法对系统的元件参数进行优化求解。仿真结果表明：应用高阶阻抗传递函数的车辆ISD悬架系统的隔振性能得到显著改善，其中，悬架动行程均方根值最多减小了20.63%，轮胎动载荷均方根值减小了11.22%。最后，根据无源网络综合的最简实现判据，将降阶转换后的双二次传递函数进行网络综合被动实现，得到了具体的机械网络结构与等效的电网络结构，并给出了车辆ISD悬架系统的结构实现方案，进一步拓展了车辆ISD悬架工程化应用的思路。
Abstract
In order to explore the performance improvement of a vehicle inerter-spring-damper(ISD) suspension by using the high order impedance transfer function, the application of bi-cubic impedance transfer function was discussed. Based on the structural characteristics of the vehicle ISD suspension employing mechatronic inerter, an approach of order reduction and transformation for the high order impedance transfer function was proposed by use of the Foster conversion in passive network synthesis. On the basis of a quarter car model, the parameters of the suspension were optimized using the improved particle swarm algorithm. The simulation results show that, the vibration isolation performance of the vehicle ISD suspension based on the high order impedance transfer function is superior to the passive vehicle suspension, the root-mean-square of the suspension working space is reduced by up to 20.63% and the root-mean-square of the dynamic tire load is reduced by 11.22%. According to the simplest implementation criterion of the passive network synthesis, the biquadratic impedance transfer function was realized by using a mechanical network and an electric network, and the structure of the vehicle ISD suspension was provided. The research expands the thinking to promote the application of the vehicle ISD suspension in mechanical engineering.
关键词
车辆 /
悬架 /
惯容器 /
高阶阻抗传递函数 /
网络综合
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Key words
vehicle /
suspension /
inerter /
high-order impedance transfer function /
network synthesis
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