文档介绍：摘 要
汽车作为一种必不可少的运载工具,越来越深刻地改变着世界,影响我们的生活。近年来随着汽车行业的蓬勃发展,越来越多的新车型走进人们的日常生活。在汽车设计和制造过程中,设计人员需要进行整车性能的分析,在产品开发初期对其性能做出预测和评价,并进行系统和结构的优化。这样能够降低研发成本、缩短研发时间从而提高汽车新产品的研发效率。因此车辆动力学的模型建立和汽车仿真计算具有日益增加的重要性。
本文阐述了汽车的基本性能,包括汽车动力性、制动性、操纵稳定性和燃油经济性, 接着分析了影响车辆性能的特征参数,针对不同的车辆性能分别建立了相对合理的仿真模型。本文以 LabVIEW 软件作为开发平台,采用了结构化设计及模块化编程的基本思路,设计出汽车性能仿真系统。本系统能够对汽车的纵向动力学相关的性能(动力性和制动性)、侧向动力学相关的汽车性能(低速时的转向性能和高速时的操纵稳定性能) 以及汽车燃油经济性能的特征参数进行仿真计算。
系统的仿真实例表明,系统操作非常简单方便,仿真结果准确性比较高,系统界面友好,系统可靠性高,程序优化方便。系统通过对汽车性能的仿真优化了车辆的结构参数,从而达到提高车辆综合性能的目的。该系统满足系统设计的预期要求。
关键词:汽车性能,仿真计算,LabVIEW,软件设计
Abstract
As an indispensable means of conveyance, the motorcar brings more and more influences in our living. With vigorous development of auto industry, more and more new models enter into the motorcar market. In the design and production process of the motorcar, designers forecast and evaluate automobile performance by analyzing characteristic parameters. In this way, designers can optimize parameters of the system and structure of the motorcar. It reduces research cost, shortens working hours and improves research efficiency. Therefore, car dynamics model foundation and automobile simulation e more and more prevalence.
This study dilates basic performances of the motorcar, such as vehicle dynamics, braking performance, fuel economy and handling directional stability. It analyzes characteristic parameters which have some connection with automobile performance and making appropriate models according to different motorcar performance. The study designs an simulation system of automobile performance by adopting the method of structuring designing and modularization programming. The system can make simulation of automobile longitudinal dynamics (vehicle dynamics and braking performance), lateral dynamics (steering performance on low speed and handling directional stability on high speed) and fuel economy by calculating the characteristic parameters.
The simulation test indicates that operation of this system is very conven