汽车驾驶性能客观表征与仿真分析

Objective characterization and simulation analysis of vehicle drivability

构建合理有效的客观表征指标体系是实现驾驶性能从主观评价到客观量化分析的关键.在探索人车交互作用关系的基础上,将汽车驾驶性能评价划分为5个方面:全负荷响应、部分负荷响应、加速踏板感觉、换挡平顺性与急踩/松加速踏板瞬态响应.在详细分析各客观表征指标的基础上,基于层次分析结构建立驾驶性能综合评价指标体系.以某自动挡乘用车型为例,借助Simulink和AVL Cruise/GSP工具构建整车纵向动力学仿真模型,对比分析最佳燃油经济性和综合性换挡策略下的部分表征指标,为实现驾驶性能客观量化分析提供了参考.

Constructing reasonable and effective objective characterization system is the key to realize drivability objective and quantitative analysis from traditional subjective evaluation method.The interaction relations between driver and vehicle were explored and the objective metrics were proposed accordingly,emphasizing on five main aspects：WOT（Wide Open Throttle）response,POT（Partial Open Throttle）response,accelerator pedal feeling,gear shift smoothness and tip in/tip out transient response.The objective characterization metrics were investigated in detailed and the comprehensive index system was created with analytic hierarchy structure.One passenger car with automatic transmission was adopted as a case study,the vehicle longitudinal performance model was built based on Simulink and AVL Cruise/GSP tools,the economical and comprehensive shift strategies were generated and the influence on drivability were contrasted and analyzed,the reference was provided for objectively and quantitatively analysis of vehicle drivability.