四轮转向车辆系统的稳定性和宝分叉与驾驶员的方向盘控制
Pengcheng Miao1, Denghui Li2, Yuan Yue3
1School of Mechanical Engineering, Yangtze University, Jingzhou 434023, China.
Chaos (Woodbury, N.Y.)
|August 7, 2023
概括
这项研究研究了四轮转向 (4WS) 车辆系统与驾驶员控制中的稳定性和宝分叉. 影响关键速度的关键参数,如可见性和拐角刚度,被确定为增强车辆动态.
科学领域:
- 车辆动力学和控制系统
- 非线性动力学和分叉理论
- 汽车工程 汽车工程
背景情况:
- 了解车辆的稳定性对于安全操作至关重要,尤其是在四轮方向盘 (4WS) 等复杂系统中.
- 分叉分析有助于预测系统行为的突然变化,例如稳定性丧失.
- 驾驶员的方向盘控制引入了非线性,这显著影响了车辆动态.
研究的目的:
- 分析包含驾驶员方向盘控制的4WS车辆系统的稳定性和宝分叉.
- 在系统的参数空间中确定波分叉的拓结构.
- 调查各种系统参数如何影响临界速度和分叉行为.
主要方法:
- 应用中央多元体理论和投影方法.
- 计算第一个和第二个Lyapunov系数来预测Hopf分叉.
- 分析系统参数及其对临界分叉值的影响.
主要成果:
- 波丁分叉,一种退化的霍夫分叉,在参数空间中表征,揭示了系统动态.
- 增加前方可见度距离和后轮转硬度提高了关键速度.
- 从引力中心到前轴的距离增加,驾驶员的时间延迟和前轮拐角刚性降低了关键速度.
结论:
- 该研究提供了关于驾驶员控制下的4WS车辆复杂动态的见解.
- 基于这些发现的参数调整可以优化车辆的稳定性和关键速度.
- 这项研究有助于设计更安全,更可预测的车辆控制系统.
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