空气悬架客车横向动力学建模和稳定性分析  

Lateral Dynamics Modeling and Stability Analysis of Bus with Air Suspension System

作　　者：陈龙[1] 陈明[1] 孙晓强[1] 蔡英凤[1] Pak Kin Wong 吴子强 Chen Long;Chen Ming;Sun Xiaoqiang;Cai Yingfeng;Pak Kin Wong;Wu Ziqiang(Automotive Engineering Research Institute,Jiangsu University,Zhenjiang 212013;Department of Electromechanical Engineering,University of Macao,Macao 999078;Yangzhou Aoterrui Automobile Electronic Technology Co.,Ltd.,Yangzhou 225299)

机构地区：[1]江苏大学汽车工程研究院,镇江212013 [2]澳门大学机电工程系,中国澳门999078 [3]扬州市奥特瑞汽车电子科技有限公司,扬州225299

出　　处：《汽车工程》2022年第11期1746-1754,共9页Automotive Engineering

基　　金：国家自然科学基金(52072161);江苏省政策引导类计划港澳台科技合作项目(BZ2020050);江苏省创新支撑计划国际科技合作项目(BZ2022055)资助。

摘　　要：针对特殊行驶工况下空气悬架客车横向动力学失稳现象的揭示问题,本文中提出一种系统非线性动力学建模和稳定性分析方法。为准确反映空气悬架客车横向动力学演化规律,建立了考虑空气弹簧和轮胎非线性力学特性的系统3自由度动力学模型。为实现复杂高维动力学系统的稳定性分析,首先基于中心流形理论对系统进行降维处理,而后对得到的约化系统进行定性性态分析,确定了系统满足鞍结分岔的充分必要条件。设置4种工况对空气悬架客车横向动力学系统在平衡点处的分岔行为进行了相平面分析,掌握了空气悬架客车在不同路面条件下随车速及前轮转角变化的横向动力学失稳演化规律,最后基于整车动力学进行仿真验证表明解析分析结果与仿真分析结果一致,证明本文提出的非线性稳定性分析方法有效可行。A system nonlinear dynamic modeling and stability analysis method is proposed in this paper to revealing the lateral dynamic instability of air suspension bus under special driving conditions.A three degree of freedom dynamic model of the system considering the nonlinear mechanical characteristics of air spring and tire is established.In order to realize the stability analysis of complex high-dimensional dynamic system,the dimension of the system is reduced based on the central manifold theory firstly,and then the qualitative behavior of the reduced system is analyzed to determine the necessary and sufficient conditions for the system to meet the requirements of saddle node bifurcation.The bifurcation behavior of the system under four working conditions at the equilibrium point is analyzed in the phase plane,and the evolution law of lateral dynamic instability of the air suspension bus with the change of vehicle speed and front wheel angel under different road conditions is mastered.Finally,the system stability analysis results are verified based on the vehicle dynamics simulation.The results show that the analytical analysis results are consistent with the simulation analysis results,which proves that the nonlinear stability analysis method proposed in this paper is effective and practical.

关 键 词：空气悬架客车 动力学建模 横向稳定性 鞍结分岔点 

分 类 号：U461[机械工程—车辆工程] U463.33[交通运输工程—载运工具运用工程]