汽车动力传动系仿真与优化  

Simulation and Optimization of Powertrain of Automobile

作　　者：唐应时[1,2] 肖启瑞[1,2] 李雪鹏[1,2] 姚汉波[1,2] 

机构地区：[1]湖南大学汽车车身先进设计制造国家重点实验室,湖南长沙410082 [2]湖南大学机械与汽车工程学院,湖南长沙410082

出　　处：《计算机仿真》2009年第6期313-317,共5页Computer Simulation

摘　　要：为了在汽车设计过程同时兼顾汽车的动力性与燃油经济性,建立了汽车动力性与燃油经济性的一般数学模型,编制程序计算了常用的动力性参数并绘制多种动力特性曲线。建立了同时考虑汽车动力性和燃油经济性为目标函数的优化模型,特别引入了加权因子的概念,使得优化结果可以根据不同设计需要有所侧重,最后得出变速器各档速比及主减速比等传动系主要参数的优化值。结合实例,对某两厢小型轿车进行计算与优化,对优化前后主要动力性参数进行分析比较,验证了仿真程序的可行性并得出了传动系优化结果。In order to give the same attention to power performance and fuel economy, the paper establishes a math model for power performance and fuel economy, computes common power performance parameters and provides several figures of power performance characteristics. Based on this, an optimization model is set up, in which the objective functions are power performance and fuel economy and the weighting factor is used in the objective functions. So the results of optimization can be adjusted according to different design demand. At last the optimized values of the transmission ratios and the final drive ratio are obtained. The feasibility of this simulation procedure is verified by a practical example.

关 键 词：汽车 动力传动 加权因子 优化 

分 类 号：U462.3[机械工程—车辆工程]