华南理工大学学报(自然科学版) ›› 2014, Vol. 42 ›› Issue (11): 63-70.doi: 10.3969/j.issn.1000-565X.2014.11.010

• 汽车工程 • 上一篇    下一篇

基于相平面法的车辆行驶稳定性判定方法研究

刘飞1 熊璐1,2 邓律华1,2 冯源1,2 邬肖鹏3   

  1. 1.同济大学 汽车学院,上海 201804; 2.同济大学 新能源汽车工程中心,上海 201804; 3.上海汽车集团股份有限公司 技术中心,上海 201804
  • 收稿日期:2014-03-28 修回日期:2014-07-07 出版日期:2014-11-25 发布日期:2014-11-17
  • 通信作者: 刘飞(1977-),男,博士,主要从事车辆动力学研究. E-mail:liufei@saicmotor.com
  • 作者简介:刘飞(1977-),男,博士,主要从事车辆动力学研究.
  • 基金资助:

    国家重点基础研究发展计划项目(2011CB711200);国家自然科学基金资助项目(51105278)

Vehicle Stability Criterion Based on Phase Plane Method

Liu Fei1 Xiong Lu1,2 Deng Lü-hua1,2 Feng Yuan1,2 Wu Xiao-peng3   

  1. 1.School of Automotive Studies,Tongji University,Shanghai 201804,China; 2.Clean Energy Automotive Engineering Center,Tongji University,Shanghai 201804,China; 3.SAIC Motor Technical Centre,Shanghai 201804,China
  • Received:2014-03-28 Revised:2014-07-07 Online:2014-11-25 Published:2014-11-17
  • Contact: 刘飞(1977-),男,博士,主要从事车辆动力学研究. E-mail:liufei@saicmotor.com
  • About author:刘飞(1977-),男,博士,主要从事车辆动力学研究.
  • Supported by:

    国家重点基础研究发展计划项目(2011CB711200);国家自然科学基金资助项目(51105278)

摘要: 文中基于相平面分析方法研究车辆行驶稳定性,根据相图变化规律确定车辆稳 定性判定方法.首先,利用实车试验数据建立了非线性单轨车辆仿真模型,并以此建立了β-β · 相图作为判定稳定性的依据;然后,分析了现有相图稳定区域划分方法的不足,提出改进的五特征值菱形稳定区域划分方法,根据相图的变化规律选用了随平衡点移动的菱形区域作为稳定区域;通过大量仿真建立了全工况下稳定区域的特征值的查表数据库,分析了特征值及稳定区域的变化规律;最后,将基于相平面法的车辆稳定性判定结果作为稳定性算法介入控制的依据,仿真结果表明,该判定方法可以为稳定性算法提供准确的依据,提高车辆稳定性.

关键词: 车辆工程, 行驶稳定性, 相平面法, 菱形稳定区域, 稳定性判据

Abstract:

In this paper,the vehicle stability is analyzed on the basis of phase plane method,and a vehicle stability criterion is determined according to the change laws of the phase plane.First,a nonlinear single- track vehicle mo- del is constructed by using vehicle test data.On this basis,a sideslip angle- sideslip angular velocity phase plane is established as the stability criterion.Then,by analyzing the shortcomings of the existing phase stability region divi- sion methods,a new method using five characteristic values to determine the diamond stability region is proposed,specifically,the diamond region moving with the equilibrium point is selected as the stability region according to the change laws of the phase plane.Moreover,a dataset of the characteristic values of the stability region under full condition is built by a large number of simulations and the change laws of both the characteristic values and the sta- bility region are discussed.Finally,the results obtained by the stability criterion based on phase plane method are used to determine the introduction of the stability algorithm.Simulation results show that the proposed stability cri- terion can provide a basis for stability control algorithms and improve vehicle stability.

Key words: automotive engineering, driving stability, phase plane method, diamond stability region, stability criterion