基于拓扑结构的悬挂系统建模与仿真

Jiangpeng Ren, Huijie Zhang, Huirong Hao, Dong Zhou, Jiawei Wang, Wenchao Zhao
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引用次数: 0

摘要

在悬架系统简化过程中,传统的纵向切割方法会引入多余的自由度,导致系统误差增大。本研究以七自由度(7DOF)汽车模型为重点,基于横切法构建了悬架系统拓扑模型。为了模拟路面激励,采用了滤波白噪声方法。使用 MATLAB/Simulink 创建了横切、传统纵切和整车结构的仿真模型。在时域和频域对这三种拓扑结构进行了比较分析。仿真结果表明,横切式简化悬架系统的性能曲线与整车模型的性能曲线非常吻合,验证了所提出的横切式拓扑结构的准确性。此外,与传统的纵向切割相比,横切简化方法将车身俯仰振动的固有频率误差降低了 25%,将车身加速度的均方根误差降低了 27%。基于横切的悬架拓扑结构更接近实际汽车结构,为提高汽车的整体乘坐舒适性提供了理论基础。
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Modelling and simulation of suspension system based on topological structure
The traditional approach of longitudinal cutting in suspension system simplification introduces redundant degrees of freedom, leading to increased system errors. This study focused on a seven degrees of freedom (7DOF) car model and constructed a suspension system topology model based on an across-cutting approach. To emulate road surface excitation, the filtered white noise method was employed. MATLAB/Simulink was used to create simulation models for the across-cutting, traditional longitudinal cutting and the whole car structure. Comparative analysis of these three topologies was conducted in both the time and frequency domains. Simulation results demonstrated that the performance curve of the across-cutting simplified suspension system closely matched that of the whole car model, validating the accuracy of the proposed across-cutting topology. Furthermore, when compared to traditional longitudinal cutting, the across-cutting simplification method reduced the natural frequency error of body pitch vibration by 25% and decreased the root mean square error of body acceleration by 27%. The suspension topology based on across-cutting more closely resembled the actual car structure, offering a theoretical foundation for enhancing overall ride comfort in automobiles.
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