毕业设计（论文）-汽车整车性能模拟仿真.doc

汽车整车性能模拟仿真 摘要 汽车动力性和燃油经济性是汽车的两个重要性能。而汽车是一种高效率的运输工具，其运输效率的高低在很大程度上取决于汽车的动力性。因为汽车行驶的平均速度越高，汽车的运输生产越高，而影响平均速度的因素，除运输组织原因外，主要就是汽车的动力性。以燃油消耗完成尽可能多的运输量的观点出发，汽车的燃油经济性常用一定运输工况下汽车行驶百公里的耗油量或一定燃油量能使汽车行驶的里程来衡量。在目前，一般采用等速燃油经济性和多工况燃油经济性评价汽车燃油经济性。在以往通常需要在完成汽车道路试验以后才能对其进行评价,但随着汽车技术、计算机技术的发展及消费者对经济性的关注逐步提高,汽车动力性与经济性分析已经在概念开发阶段就开始了。这样不仅可以节省大量的试验费用,缩短设计周期,而且使得厂家对自己所设计的车有个预先的了解。 本文以MATLAB为工具，利用其强大的界面开发功能，设计了汽车动力性和燃油经济性模拟计算的界面。并利用汽车理论的相关知识及汽车动力性燃油经济性的计算方法,编写计算程序。应用该软件，在我们输入相关的汽车参数时，执行计算程序后，便得到动力性及燃油经济性模拟仿真的结果，从而为汽车新产品设计与开发提供参考依据。 关键词：动力性；经济性；MATLAB；模拟计算 Abstract Two important performance of automobile is power and fuel economy.Automobile is a highly efficient means of transport , the level of thetransport efficient of that determined in the automobile power, because of the higher the average speed of automobile, the higher transportation and production of the vehicle. But the factors that affect the average speed, in addition to the reasons of the organization of transportation,the most of these are power. To fuel consumption as much as possible to complete the point of view of traffic, automobile fuel economy often use a certain transport conditions the fuel consumption of 100 kilometers, or a certain amount of fuel mileage to measure. At present，we generally use isokinetic fuel economy and the status of multi-fuel economy to evaluate automobile fuel economy. In this paper, MATLAB is used as a tool, using its powerful function of interface development design a interface that can simulate and calculate the vehicle power and fuel economy. Application of the software , as we input the vehicle-related parameters, after the implementation of the calculation procedure we can get the simulation of result of vehicle power and fuel economy. Consequently we can also provide reference for the design and the development of the new automotive products. Keywords：power; fuel economy; MATLAB; interface; programming; simulation 1 绪 论 1 1.1 选题背景 1 1.2 汽车模拟仿真的国内外研究现状 2 1.3 汽车模拟