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《商用车前下部防护要求》法规的介绍
在我国混合交通模式为主的交通环境中,许多二级公路和乡村公路都没有设置中央隔离带,小型车辆逆行超车很容易造成小型车辆钻入商用车前下部的恶性事故(图1所示)。欧洲从1980年开始商用车前下防护的研究(图2所示),1994年实施了ECE—R93商用车前下防护的法规。中国借鉴了欧洲ECE—R93法规制订了GB26511—2011《商用车前下部防护要求》的强制性法规,2011年5月12日发布, 相似文献
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在我国以混合交通模式为主的交通环境中,许多公路没有设置中央隔离带,车辆逆行超车容易造成轿车钻入商用车前下部的恶性事故.欧洲从1980年开始商用车前下防护的研究(图1所示),1994年实施了ECE-R93商用车前下防护的法规.目前我国正准备实施的<商用车前下部防护要求>强制性标准,主要借鉴欧洲ECE-R93法规.国内各大商用车企业全新设计的N2、N3类卡车必须充分考虑该项法规的要求,在卡车前部设计安装前下防护装置. 相似文献
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针对现有运动规划算法大多只考虑障碍车当前状态,本文中提出一种基于前车运动轨迹预测的高速车辆运动规划算法。首先,融合考虑驾驶意图与基于车辆运动模型的方法对前车轨迹进行预测;然后,采用贝塞尔曲线(Bezier)规划主车运动轨迹,结合避撞过程中与前车碰撞风险概率,高速避撞车辆速度变化特点以及车辆运动稳定性等因素建立目标函数,并考虑车辆动力学与运动学约束,使用序列二次规划(SQP)方法对Bezier曲线的控制点和主车运动目标点位置进行优化求解,得到最优避撞运动轨迹;最后,以前车直行和换道两种工况为例,对主车的避撞运动轨迹进行规划,分析不同工况下主车避撞过程中的运动状态变化以及与前车碰撞风险概率变化。结果表明,所提出的运动规划算法能够保证车辆的避撞安全性与运动稳定性。 相似文献
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安全带动态性能试验方法研究 总被引:1,自引:0,他引:1
通过对各国安全带试验标准的对比、滑车碰撞模拟计算、实际道路交通情况统计分析、国产安全带动态试验中验证及标准人体车内位移量的测量,提出了我国安全带动态试验中碰撞车速、台车质量及碰撞减速度波形,试验用假人及允许假人位移量的界限值。 相似文献
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The front end module (FEM) needs enough space from hood to absorb the energy from any pedestrian collision. The FEM with downsized cooling module for pedestrian protection is important to reduce the severity of pedestrian injury. When a vehicle collision happens, the FEM with downsized cooling module is required to reduce the risk of injury to the upper legs of adults and the heads of children. In this study, the performance of cooling module to cool the engine was investigated under 25% height reduction. The heat dissipation and pressure drop characteristics have been experimentally studied with the variation of coolant flow rate, air inlet velocity and A/C operation (on/off) for the downsized cooling module. The results indicated that the cooling performance was about 94% level compared to that of the conventional cooling module. Therefore, we concluded that the cooling module had a good performance, and expected that the cooling module could meet the same cooling performance as conventional cooling module through optimization of components efficiency. This paper also deals with the development of FEM with downsized cooling module for the cooling performance level in vehicles. In the test of front end module??s heat dissipation performance, the prototype presented about 15% decrease under the conditions of all the vehicle speeds than that of conventional one. 相似文献
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Evaluation of automotive forward collision warning and collision avoidance algorithms 总被引:2,自引:0,他引:2
K. Lee H. Peng 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2005,43(10):735-751
Collision warning/collision avoidance (CW/CA) systems target a major crash type and their development is a major thrust of the Intelligent Vehicle Initiative. They are a natural extension of adaptive cruise control systems already available on many car models. Many CW/CA algorithms have recently been proposed but the existing literature mainly focuses on algorithm development. Evaluations of these algorithms have been usually based on subjective ratings. The main contribution of this paper is the utilization of a naturalistic driving data set for the evaluation of CW/CA algorithms. We first collect manual driving data from the ICCFOT project, then process the data by Kalman smoothing, and finally identify 'threatening' and 'safe' data sets according to vehicle brake inputs and vehicle range behavior. Five CW/CA algorithms published in the literature are evaluated against the identified data sets. The performance of these algorithms is determined through a performance metric commonly used in signal detection and information retrieval under unbalanced data population. 相似文献
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Adithya Arikere Derong Yang Matthijs Klomp Mathias Lidberg 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2018,56(10):1577-1603
Development and deployment of steering based collision avoidance systems are made difficult due to the complexity of dealing with oncoming vehicles during the evasive manoeuvre. A method to mitigate the collision risk with oncoming vehicles during such manoeuvres is presented in this work. A point mass analysis of such a scenario is first done to determine the importance of speed for mitigating the collision risk with the oncoming vehicle. A characteristic parameter was identified, which correlates well with the need to increase or decrease speed, in order to reduce the collision risk. This finding was then verified in experiments using a Volvo XC90 test vehicle. A closed-loop longitudinal acceleration controller for collision mitigation with oncoming vehicles is then presented. The longitudinal control is combined with yaw stability control using control allocation to form an integrated controller. Simulations in CarMaker using a validated XC90 vehicle model and the proposed controller showed consistent reductions in the collision risk with the oncoming vehicle. 相似文献