中型纯电动客车空气弹簧悬架Modelica模型的研究

Research on Modelica Model of Air Spring Suspension for Medium Pure Electric Bus

针对国内中、小型纯电动客车上尚未使用空气弹簧双横臂式独立悬架的问题,在中、小型纯电动客车上进行空气弹簧双横臂式前独立悬架的设计,并基于多领域统一建模语言Modelica,在仿真平台MWorks环境下以7米级中型纯电动客车为例对所提出的设计进行了动力学仿真分析。通过分析前轮主要定位参数随车轮跳动行程的运动特性变化规律,可知这一创新式设计所得的客车前轮定位参数特性与同类型的热动力客车设计参数基本相符,满足设计要求。所做研究为空气弹簧悬架在中、小型纯电动客车的推广使用提供了理论基础,对纯电动客车的研发改进具有较高的指导意义。

In view of the problems in the domestic medium and small sized pure electric buses,it has not yet used the air spring double wishbone independent suspension.The air spring double wishbone front independent suspension was designed on the medium and small pure electric passenger cars.The dynamic simulation analysis of the proposed design is carried out in the simulation platform MWorks environment in the case of 7m class of pure electric buses,based on the multi-domain unified modeling language Modelica.By analyzing the law of the change of the front wheel's main positioning parameters with the movement characteristics of the wheel’s beating stroke,it can be seen that the characteristics of the front wheel positioning parameters of this innovative design are basically consistent with the design parameters of the same type of thermal power bus to meet the design requirements.The study provides a theoretical basis for the popularization and application of the air spring suspension in the medium and small pure electric buses,which has a higher guiding significance for the research and development of the pure electric bus.