以安全为导向的自动化车辆纵向控制,同时考虑稳定性和减压行为
Yulu Dai1, Chen Wang1, Yuanchang Xie2
1School of Transportation, Southeast University, China.
Accident; analysis and prevention
|February 4, 2024
概括
车辆的减噪特性对于自动驾驶汽车 (AV) 的安全至关重要. 这项研究表明,最佳的缓冲比提高了AV纵向控制系统的安全性和稳定性,提供了关键的设计见解.
科学领域:
- 汽车工程 汽车工程
- 控制系统 控制系统
- 交通安全 交通安全
背景情况:
- 自动驾驶汽车 (AV) 在交通容量和安全方面提供了潜在的好处.
- 现有的AV纵向控制研究往往忽视了车辆的减噪特性,专注于稳定性或安全-稳定性权衡.
研究的目的:
- 为了突出车辆阻尼在AV纵向控制中的重要性.
- 提出一个以安全为导向的AV纵向控制策略,考虑阻尼行为.
- 为AV系统中控制参数提供建议.
主要方法:
- 集成了一个自适应式巡航控制 (ACC) 模型与缓冲行为分析.
- 进行了数值模拟,以评估移动性和安全性之间的关系.
- 使用DRAC,CPI和TIT等替代安全措施评估ACC控制参数.
主要成果:
- 低缩的AV状态 (缩比<1) 比临界缩 (比率=1) 或过度缩状态 (比率>1) 更不安全.
- 在1和1.2之间的ACC减压比提高了给定的车后时间延迟的安全性.
- 增加AV汽车后续时间延迟提高了安全性和稳定性.
结论:
- 明确考虑阻尼行为对于设计安全的AV纵向控制至关重要.
- 最佳的阻尼比率和汽车后续时间延迟有助于提高AV安全性和稳定性.
- 研究结果为开发强大的自动驾驶控制算法提供了关键的见解.
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