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汽车碰撞事故再现估算速度的不确定度分析 总被引:3,自引:0,他引:3
不确定度分析是一种考察人试验测量输入值得到计算结果输出之间不确定度传播的数学方法。本文中将不确定度分析方法引入汽车碰撞事故再现的模型算法中,推算碰撞前速度的不确定度,给出了在汽车正面斜碰撞事故再现中的一个应用实例。通过对计算结果的分析,初步得到了不确定度的传播规律,并指出了相关问题和发展方向。 相似文献
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通过道路交通事故再现来研究汽车事故、总结事故发生规律,可为分析事故过程、确定事故责任提供参考依据。本文以某次交通碰撞事故为实例,通过计算及分析来重现事故过程。 相似文献
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1、车辆碰撞交通事故 (1)交通事故的发生 道路交通事故是全球共同面临的最为严重的社会公害,随着我国汽车保有量的不断增加,道路建设的日新月异,交通事故数量也在不断上升而且居高不下,由交通事故造成的人身生命和财产损失以及相应的民事和刑事诉讼等社会问题也日益严峻。 相似文献
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基于PC-Crash人-车碰撞事故再现结果的误差分析 总被引:2,自引:0,他引:2
基于PC-Crash软件,研究车辆与行人碰撞交通事故的三维再现结果的误差来源和影响因素.结合实际案例的模拟过程,通过不断调整参数以达到理想的准确度,分析对模拟结果影响较大的关键参数,为以后的再现研究提供指导和借鉴,同时验证使用PC-Crash再现人-车事故的可行性与准确性. 相似文献
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This paper presents efficient 3-D collision crush modelling methods utilizing photogrammetry and 3-D scanner for reconstruction analysis of vehicle collision accident. Photogrammetry for 3-D collision crush modelling was executed in two methods: Indirect photogrammetry utilizing small amount of preexisting photographic data, and direct photogrammetry utilizing large amount of photographic data collected for the purpose of 3-D modelling. With the 3-D scanner, it was possible to create a more precise 3-D crush model than the photogrammetry method. Using these 3-D crush models constructed with the mentioned methods, several applications in accident reconstruction analysis are presented, based on construction methods and characteristics of the resulting crush model. Indirect photogrammetry produced a 3-D model capable of providing approximate shape of crush with only 2 ~ 3 photos of the damaged vehicle, and made it possible to measure the crush volume for estimating the collision velocity. With direct photogrammetry or 3-D scanner, moving and rotating elaborately built 3-D vehicle deformation models makes it possible to precisely reconstruct the actual collision configuration. Additionally, by elaborately modelling the vehicle and its fragments and then putting them together, it is possible to construct a post-collision model of the whole vehicle. 相似文献
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电动汽车驱动系统再生制动特性分析与仿真 总被引:2,自引:0,他引:2
电动汽车行驶时对能量的需求以及延长续驶里程要求驱动电机具有再生制动能力,既可以提供制动力,又可以将制动过程中的能量回收。通过对汽车制动模式及其产生的能量进行分析。以永磁无刷直流电机系统在作电动汽车动力时实现电气制动为控制策略,仿真了回馈制动,并对仿真结果进行了分析、探讨。结果表明,再生制动的算法是可行的,能满足能量回收要求。 相似文献
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基于不确定度理论,针对汽车-自行车侧撞事故的速度计算模型建立了相应的不确定度分析方法.结合事故再现模型,运用方差合成理论并考虑自行车抛距与行人抛距间的相关性,将各标准不确定度分量进行合成,最终得到车速估算的合成标准不确定度和扩展不确定度,由此给出较合理的车速估算结果.通过一个典型事故分析案例,验证了该方法的正确性. 相似文献
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Xiangkun He Yulong Liu Chen Lv 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2019,57(8):1163-1187
ABSTRACTCollision avoidance and stabilisation are two of the most crucial concerns when an autonomous vehicle finds itself in emergency situations, which usually occur in a short time horizon and require large actuator inputs, together with highly nonlinear tyre cornering response. In order to avoid collision while stabilising autonomous vehicle under dynamic driving situations at handling limits, this paper proposes a novel emergency steering control strategy based on hierarchical control architecture consisting of decision-making layer and motion control layer. In decision-making layer, a dynamic threat assessment model continuously evaluates the risk associated with collision and destabilisation, and a path planner based on kinematics and dynamics of vehicle system determines a collision-free path when it suddenly encounters emergency scenarios. In motion control layer, a lateral motion controller considering nonlinearity of tyre cornering response and unknown external disturbance is designed using tyre lateral force estimation-based backstepping sliding-mode control to track a collision-free path, and to ensure the robustness and stability of the closed-loop system. Both simulation and experiment results show that the proposed control scheme can effectively perform an emergency collision avoidance manoeuvre while maintaining the stability of autonomous vehicle in different running conditions. 相似文献
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