郑州市乘用车行驶工况的构建

Construction of Passenger Vehicle Driving Cycle in Zhengzhou

为提供更精确的郑州市乘用车排放检测依据,以郑州市乘用车实际行驶工况为研究对象,运用Matlab编程实现对613792条行驶工况的短行程划分、主成分分析和K_means聚类分析,构建了时间为1225s的郑州市乘用车行驶工况并从特征参数误差、速度-加速度联合分布、仿真验证三个方面验证了构建工况的精度,该工况能反映郑州市实际交通状况,并与ECE15工况的特征参数进行对比,表明ECE15工况与郑州市乘用车行驶工况存在差异,建议郑州地区采用该工况作为车辆排放的检测法规。

In order to provide a more accurate measurement of Zhengzhou passenger vehicle emissions,taking the actual driving cycle of Zhengzhou city as the research object,using MATLAB programming to achieve the 613792 driving conditions of the short trip division,the principal component analysis（PCA）and K-means clustering analysis,to construct a time for the1225 s Zhengzhou passenger car driving cycleand the accuracy of the construction was verified from three aspectsthe characteristic parameter error,the speed-acceleration frequency distribution and the simulation verification.It indicates that this driving cycle can reflect the actual traffic situation in Zhengzhou and compared with the characteristic parameters of ECE15 condition,it shows that there are differences between the ECE15 condition and the driving condition of passenger car in Zhengzhou.It is suggested that the Zhengzhou region should adopt this driving cycle as the testing rule of vehicle emission.