【作者】 王维；

【导师】 杜小芳；

【作者基本信息】 武汉理工大学 ， 车辆工程， 2012， 硕士

【摘要】 随着汽车保有量越来越高和汽车行驶速度越来越快,夜间发生重大交通事故越来越普遍,人们开始对汽车夜间行车安全给予更多的重视。前大灯作为现代汽车三大安全件之一,它是让夜间处在很远的行人和会车者知道汽车到来的标志,能为驾驶员夜间行车提供足够的视野范围,所以,前大灯性能好坏直接影响着夜间行车安全性。市场竞争对产品快速更新的需要和消费者对高性能需求,使得传统的汽车前大灯系统不能满足现代各种工况道路的需要。随着计算机技术、控制技术和有限元技术的发展,大量通用型商业化的三维设计软件、控制仿真软件和有限元仿真软件应运而出并且获得了广泛的应用,这些技术的革新带来了新的产品开发,汽车前大灯随动转向系统应运而生。目前,汽车前大灯随动转向系统技术几乎为外国整车厂或车灯巨头所垄断,国内高级汽车上安装的汽车随动转向系统也大多是国外技术转战到中国本土化生产的产物。基于这样的背景本文以控制理论和有限元理论为基础,以数学软件Matlab、三维设计软件Catia和通用有限元软件Hypermesh为工具,对典型汽车随动转向系统控制策略及其结构动态特性进行研究分析。首先,本文对汽车前大灯随动转向的研究背景和目前的研究状况进行了介绍,阐述了该研究内容的意义和重要性,制定了本文的研究内容和组织框架。然后在了解了汽车前大灯随动转向的法律法规后,分析了汽车前大灯随动转向的组成、结构原理和功能,为后续的研究奠定了理论基础。其次,本文在分析汽车随动转向中重要的两个参数—汽车安全刹车距离和车灯水平转角后,结合汽车行驶驾驶器和PID控制器对汽车前大灯随动转向系统控制策略进行研究,建立了前大灯随动转向系统水平和垂直方向的控制模型,并对模型进行仿真分析。最后,本文通过现在汽车及其零部件设计中比较重要的环节技术—逆向工程技术,对汽车前大随动转向系统点云进行处理、逆向得到了汽车前大灯部分三维数学模型。利用大型通用有限元仿真软件Hypermesh,把前大灯模型进行简化,得到了前大灯有限元仿真模型,然后对前大灯动态特性进行仿真优化。更多还原

【Abstract】 As car ownership more and more and automobile driving faster and faster, serious traffic accident which is happened at night becomes more and more common, so people pay more attention gradually to car safety driving at night. As one of the three major safety protector in Modern car, headlight can provide enough vision scope for drivers to drive at night, which is the mark that let the pedestrians at night and driver of coming the car far away another car will come, so, the performance of headlight is directly determined by the security of driving at night. The market competition for the need of quick update products and consumer demand for high-performance, makes the traditional car headlight system not suit for the need of modern way under different conditions. With the development of computer technology, control technology and finite element t analysis technology, a large number of universal commercial software, just like3D design software, control simulation software and finite element simulation software emerge at the right moment t and get a wide range of applications.Because the technology innovation brings new product development, adaptive Front-lighting System is the product of new technology.At present, the technology of automotive adaptive Front-lighting System is monopolized by foreign automotive giant or automotive lamp giant, adaptive Front-lighting System of Limousine Car is foreign technology which is moving production localization in China internally. In this text, based on the control theory and finite element and theory, the Matlab and3D software Catia and general finite element software Hypermesh as a foundation, the paper research and analysis control strategy and its structure dynamic characteristics of adaptive Front-lighting System with the typical car.First of all, the paper has introduced the research background and the present study condition is of adaptive Front-lighting System, discusses the significance and importance of research contents, formulate and organize framework of this paper. And then this paper analysis the composition, structure principle and function of adaptive Front-lighting System after understanding the laws and regulations of car headlights, which lays a theoretical basis for the follow-up study. Secondly, after the analysis of the two important parameters-auto safety brake distance and light level after corner of adaptive Front-lighting System and combined with the car driving device and PID controller for control strategy of adaptive Front-lighting System, this paper has established vertical and horizontal control model of adaptive Front-lighting System, and analysis simulation model.Finally, through design the car and parts by now more important link of technology-reverse engineering technology, this paper has obtained part3D mathematical model of adaptive Front-lighting System after the point cloud processed, reversed. Using the universal finite element simulation software Hypermesh, simplifying the headlight model, this paper has obtained the finite element simulation model of adaptive Front-lighting System, and then optimize and simulat the dynamic characteristic of the lamp.更多还原