计算机科学 ›› 2021, Vol. 48 ›› Issue (6A): 289-294.doi: 10.11896/jsjkx.200600019
罗靖杰, 王永利
LUO Jing-jie, WANG Yong-li
摘要: 汽车行驶工况体现了汽车道路行驶的运动学特征,现有的行驶工况构建方法往往存在着构建粒度不细、精度不高的问题。为了解决工况构建的粒度和精度问题,提出了一种细粒度汽车行驶工况模型构建方法(Construction method of Automobile Driving Cycles based on SOM and Markov model,ADCSM)。首先行驶数据进行Daubechies-4阶小波分析降噪,划分短行程,对短行程提取了10个特征,将短行程特征输入SOM神经网络,然后聚类到(1*3)神经网络中,得到聚类结果序列,并建立了马尔可夫模型,最终通过ADCSM算法完成工况构建。对所构建的工况进行了验证,并将所得工况与传统的K-means聚类构建方法的结果进行了比较分析。实验结果表明,ADCSM最终误差为4.07%,而传统的K-means误差为8.77%,ADCSM利用了SOM神经网络聚类的方法,比传统K-means方法聚类精度更高,并具备了工况自学习能力。ADCSM利用马尔可夫模型方法体现了城市行驶状况的转换关系,与传统K-means行驶工况构建方法相比粒度更细,故合成的行驶工况效果更好,更能反映城市特征。
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