对于四轮电动汽车的差分方向盘的层次控制
1College of Automobile and Traffic Engineering, Nanjing Forestry University, Nanjing, China.
PloS one
|June 9, 2023
概括
本研究介绍了四轮电动汽车差分方向盘的层次控制方法. 该策略确保稳定的车辆控制和恒定的速度,即使在不同的抓地力水平的道路上.
科学领域:
- 汽车工程 汽车工程
- 控制系统 控制系统
- 机器人技术 机器人技术 机器人技术
背景情况:
- 电动汽车 (EV) 由于单个轮子电机化,提供了先进的控制可能性.
- 不同方向盘,利用轮子之间的扭矩差异,为电动汽车带来了独特的控制挑战.
- 现有的控制方法可能无法在不同的道路条件下充分解决同时操纵方向盘和控制速度的问题.
研究的目的:
- 研究和开发四轮电动汽车差分方向盘的等级控制策略.
- 为了实现差异方向盘的同时控制和恒定的纵向速度.
- 确保车辆在各种道路粘附条件下的稳定性和性能.
主要方法:
- 建立车辆,方向盘系统和参考模型的动态模型.
- 一个具有滑动模式控制 (上方),二级编程 (中间) 和反向轮胎建模 (下方) 的等级控制器的设计.
- 使用最小轮胎负载比率作为在定义约束下目标函数的优化.
主要成果:
- 提出的层次控制器有效地管理了差异转向和纵向速度.
- 模拟表明,在具有高和低粘附系数的道路上成功追踪车辆模型.
- 所有模拟的轮胎负载比都保持在1以下,表明稳定运行在轮胎摩擦限制内.
结论:
- 开发的层次控制策略对四轮电动汽车的差分方向盘有效.
- 该方法确保了在各种道路条件下强大的性能和稳定性.
- 这种方法有助于提高电动汽车设计中的机动性和安全性.
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