摘要
为比较环境风洞(climatic wind tunnel,CWT)模拟极端环境下汽车运行工况的准确性,设计了实际路试与环境风洞的对标试验,采集了典型高温山区路段汽车的运行数据。通过运动学片段分割构造出车辆的行驶工况图。以运动学片段聚类结果所代表的汽车3种运行状态为基础,利用标准化均方误差方法和特征参数值的计算结果对两次试验中汽车行驶工况的关联性与差异性进行具体分析。结果表明:对标试验结果的关联性极强,其细微差异主要体现在第一类运动学片段上,并且频繁的加减速是汽车3种运行状态中对热管理系统升温影响最大的。可见,环境风洞的模拟结果基本上是准确有效的。
In order to compare the accuracy of the automotive climatic wind tunnel(CWT)to simulate the automotive operating conditions in extreme environments,a comparative test was designed between the CWT and the actual road test.Automotive operating data was collected on the typical high-temperature mountain road.The driving cycle diagrams of vehicles were constructed by using the method of segmenting kinematic sequences.Three automotive operating states were obtained by the clustering results of the kinematic sequences.The normalized mean square error method and the calculation results of characteristic parameters were used to analyze the test results.Based on the above work,the correlation and difference of the automotive operating conditions were analyzed in the two tests.The results show that the correlation is very strong between the results of the comparative test.The difference is mainly reflected in the first type of kinematic sequences.The operating state of frequent acceleration and deceleration has the greatest influence on the heating of the thermal management system among the three operating states of the automobile.It can be concluded that the simulation results of the CWT are basically accurate and effective.
作者
徐婷
刘明
崔世超
芮飞
石锋
XU Ting;LIU Ming;CUI Shi-chao;RUI Fei;SHI Feng(College of Transportation Engineering, Chang'an University, Xi'an 710064, China;School of Automobile, Chang'an University, Xi'an 710064, China;China Automotive Engineering Research Institute Co., Ltd., Chongqing 401122, China)
出处
《科学技术与工程》
北大核心
2021年第28期12268-12275,共8页
Science Technology and Engineering
基金
国家自然科学基金(51878066)
国家重点研发计划(2018YFC0807505)。
关键词
汽车环境风洞(CWT)
运动学片段
行驶工况
关联性
热管理
automotive climatic wind tunnel(CWT)
kinematic sequences
driving cycle
correlation
thermal management
作者简介
第一作者:徐婷(1983—),女,汉族,陕西西安人,博士,副教授,研究方向:交通安全,E-mail:annabelxu@163.com。
