【作者】 张晓玉；

【导师】 曹立波；

【作者基本信息】 湖南大学 ， 车辆工程， 2010， 硕士

【摘要】 随着社会的发展,人们对汽车的安全性要求越来越高,尽量减少交通事故的损失成为当前汽车领域亟需解决的重要科技问题。目前,汽车安全领域的主动安全技术难以大幅度的降低交通事故,主要是因为事故发生原因的复杂性和突然性。针对这一现状,很多机构已经将主动安全技术与被动安全技术结合起来研究。然而,目前的大多数结合仍然停留在相加式的结合,即仅仅是在同一辆车上同时使用主动安全技术与被动安全技术。本课题组创新性地将主动安全技术中的事故预测技术与被动安全技术中的结构缓冲吸能技术紧密结合并赋予新的内涵,使其达到1+1>2的效果。本论文结合课题“主被动结合新型汽车碰撞吸能装置的关键技术研究”,设计开发了该装置的控制部分。提出了一种基于汽车制动加速度积分的算法,以此来识别汽车驾驶员紧急制动行为,判断事故是否发生。设计了采用移动窗积分算法的控制系统硬件电路和软件程序,并通过实车实验采集了某车型在不同车速下紧急制动、正常制动、点刹和通过路障等四种工况的加速度信号,分析验证了移动窗积分算法能够及时区分出驾驶员的紧急制动行为。阐述了系统算法中关键参数的确定原则,确定了用于区分紧急制动工况和其它工况的合理的积分时间窗宽和积分阈值。通过两次小车实验验证了所设计的汽车碰撞缓冲吸能装置的控制系统能够实时有效地触发,为进一步开发主被动结合的新型汽车碰撞缓冲吸能装置提供了有力的支持。更多还原

【Abstract】 With the development of society, demands for vehicle safety are getting higher and higher. How to reduce the traffic accident has become a problem outstanding in the Automobile industry. The current active safety system in the field has difficulty in getting a lower accidents rate due to the complex reason for the sudden accident. Under this circumstance, the trend has been formed about the research by combing the active with the passive safety technologies in many organizations. However, most methods of the current combination still remain the combination of styles, that is, merely a vehicle uses active security technology and passive safety technology simultaneously. The research group innovatively make the accident prediction technologies of the active safety technologies closely combined with the structure absorption of the technology passive and gives new meaning.to reach the "1+1 >2"results.This paper summarizes the current status of automotive safety technology. Based on the subject of a new combination of active and passive vehicle car crash energy absorption system, vehicle combining active and passive energy absorption of new cars in the system control part has been researched. It discusses the airbag triggering method and proposes point-based automobile brake acceleration algorithms in order to identify the emergency braking behavior of the car drivers to determine whether the accident occurred. The integration method of using moving window control system hardware circuits and software programs is designed. And through collecting real vehicle experiments at different speeds of a vehicle emergency braking, the normal brake, pumping the brakes, and the passing the road blocks and so on we collect four kinds of acceleration signals, mobile window integration method can distinguish the driver’s emergency braking behavior in time has been analyzed and it has been tested. This paper describes the determinate principle of the key parameters in the System algorithm, and determines the reasonable integration time window width and the integral threshold which are used to distinguish the emergency braking conditions from other conditions.In the article, model validation is then carried out with two experimental data’s which validates the effectiveness of control system of the energy-absorbing structure during the collision accident occurred. It has provided a powerful support for further development of the new model.更多还原