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基于驾驶行为的汽车主动防撞预警系统的安全车距研究
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摘要
本文综合分析了目前全世界汽车交通安全的状况和汽车主动安全所采用的技术以及其研究现状,从汽车主动安全以及安全车距模型这两个方面着手进行研究,指出其发展现状、应用情况和存在的问题,从而说明安全车距模型的研究及设计在汽车主动安全中的重要作用及意义。
     汽车行驶安全状态判断是汽车主动避撞系统功能实现的基础,而其核心内容之一是提出有效的安全车距模型。从提高汽车主动避撞系统实用性出发,安全距离模型要保证多数交通情况下主动避撞系统正常工作,减小由于误判断造成误操作的可能性。在保证安全的基础上,应以实际交通情况下驾驶员的驾驶特点作为安全距离模型建立的基础。
     具有不同经验技能的驾驶员对安全跟车车距有不同的衡量标准,而驾驶员不同的身体及心理状况等个人因素,以及路况、天气、行车环境等都对车辆安全行驶状态的判别有影响。因此,作为车辆行驶安全状态判断标准的安全车距模型也必须同时反映出人、车、行驶环境状态的差异,使车辆防碰撞安全预警系统能满足不同驾驶员的个性化特征或驾驶状态,这样才能降低避撞系统的虚警率、误警率,在促进交通安全的同时提高交通效率。
     本文在总结国内外关于主动避撞安全车距模型研究的基础上,分析了影响跟随车辆减速避撞操作的人的各种因素,提出了一种考虑驾驶员个体特征的安全行驶车辆间距模型,主要对安全车距模型的设计和行车安全状态的判定这两方面进行详细描述,从“驾驶员、车、环境”这三个影响汽车安全的主要因素出发,并将驾驶员这一重要因素放在首要考虑位置,完整的分析了驾驶员在各种生理状态下对驾驶状态的影响,并运用综合加权法完成经过修正的安全车距模型的设计。
     根据建立的修正后车辆安全车距模型,利用Matlab/Simulink来建立汽车安全车距仿真模型进行仿真,以不同状态下驾驶员的反应时间为主要输入变量,从而完成修正后车辆安全车距模型的仿真。
     本文的研究主要从驾驶员的角度考虑安全车距模型,将目前安全车距模型所忽略的驾驶员为出发点提出一种安全车距模型,研究结果为汽车主动安全提供一种有效的安全车距模型。
This comprehensive analysis of the present world situation of the traffic safety and security for the car hit the use of technology and research, the initiative of devoting the security and safety model of car from the present situation, the application of the situation and problem that the model car is the research and design in the active role and security.
     The car by the state security is to realize the functions of collision avoidance system, and its core content is a valid safety from the model of car from the collision avoidance system to practical, safe from the model to ensure that the majority of traffic to the collision avoidance system, reduces normal work of the judgment made by the false operation of possibility. in that security based on actual cases to the driver driving features is a safe distance. the establishment of the model
     this article mainly from the safe from the model car design and the security of the state of the judge described in more detail, from the people、cars evironment "the three affect the safety of the major factors, and people the driver is an important factor in the primary consideration, analysis of the pilot in all sorts of physical condition of a state, applying the law amended the completion of the safety of the model car design. according to the establishment of the revised model of car from the traffic safety of matlab and simulink for the safety of the car is a simulation model of emulation, the people of different states of the pilot response time is the main input variables and accomplishes the revised model of car from the traffic safety of emulation. this research mainly from the perspective of consider safe from the model car will be security model car is the neglected in the pilot made a safe distance, the model for the safety of research to provide an effective security.
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