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arXiv 2402.13650cs.RO
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高速四轮驱动小型车辆的越障策略

Obstacle crossing strategies for high-speed 4WD small-scale vehicle

Université Clermont Auvergne(克莱蒙奥弗涅大学);Clermont Auvergne INP(克莱蒙奥弗涅国立工程师学院);CNRS(法国国家科学研究中心);Institut Pascal(帕斯卡研究所);INRAE(法国国家农业食品与环境研究院);MecaBotiX(MecaBotiX公司);EMSE(法国圣埃蒂安国立工程师学院);LIMOS(LIMOS实验室)

Philippe Vaslin, Denis N'Chot, Roland Lenain, Jean-Christophe Fauroux, Lama Al Bassit

AI总结:

本文通过实验设计研究高速四轮驱动车辆跨越台阶障碍的行为,基于动能变化、接触时间和俯仰角速率三个指标,提出一种新型高速越障策略,并给出可实时调整这些指标的实验函数。

摘要:

无人地面车辆的越障通常依赖两种策略:(i)施加车轮扭矩进行攀爬,以及(ii)利用轮腿或轮桨改变车辆形态,将车轮抬升至障碍物顶部。然而,这些策略大多为了延长车轮与障碍物的接触时间而牺牲速度。本文通过实验设计(DoE)研究了一辆四轮驱动(4WD)高速车辆跨越台阶障碍时的行为。一个三维多体车辆模型配备了一种新型二自由度(2-DoF)悬架系统,针对给定的速度和障碍物高度,调整其水平阻尼系数,以衰减车轮相对于底盘在纵向和垂直方向上的运动。DoE 结果使我们能够基于三个指标提出一种新型高速越障策略:(i)车辆的动能变化,(ii)车轮与障碍物之间的接触时间,以及(iii)弹道阶段开始时的俯仰角速率。文中提出了实验函数,以便能够实时修改这些指标。

英文摘要:

Unmanned ground vehicle obstacle crossing generally relies on two strategies: (i) applying a wheel torque for climbing and (ii) modifying the vehicle shape by using a wheel-leg or wheel-paddle to lift the wheel on top of the obstacle. However, most of those strategies sacrifice speed in order to have a longer contact duration between the wheels and the obstacle. This paper investigates the behaviour of a 4WD high-speed vehicle while crossing a step obstacle using a design of experiment (DoE). A 3D multibody vehicle model is equipped with a novel 2-DoF suspension system, which horizontal damping coefficient is modify to dampen wheel motion in longitudinal and vertical directions in relation to the chassis, for a given speed and obstacle height. The DoE results allow to propose a novel high-speed obstacle crossing strategy based on three metrics: (i) the kinetic energy variation of the vehicle, (ii) the contact duration between the wheel and the obstacle, and (iii) the pitch rate at the start of the ballistic phase. Experimental function are proposed to be able modify these metric in real time.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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