基于熵值法的汽车动力性能主观评价指标权重确定方法  

Determination of Weights of Subjective Evaluation Indexes of Automobile Dynamic Performance Based on Entropy Method

作　　者：王生昌[1] 付迪[1] 陈娟娟[1] 蔡凤田 张学文 

机构地区：[1]长安大学汽车学院,陕西西安710064 [2]运输车辆运行安全技术交通行业重点实验室,北京100088

出　　处：《公路交通科技》2015年第7期153-158,共6页Journal of Highway and Transportation Research and Development

基　　金：运输车辆运行安全技术交通行业重点实验室开放课题项目(KFKT2012-01)

摘　　要：为了客观地确定汽车动力性能主观评价指标的权重系数,采用熵值法进行研究。介绍了熵值法的基本原理和求解过程,并结合层次分析法的基本思想构建主观评价体系,确定主观评价的试验道路以及试验工况。选取3位评车师,对5辆乘用车进行主观试验,结合十分制评分法对评价指标打分,得到各指标评分值,采用熵值法对指标赋权,加权得到5辆车的主观评价总得分。结果表明,熵值法完全以客观数据为依据,能够很好地确定各评价指标的权重系数,具有良好的客观性;对于同一辆乘用车而言,3位评车师的评价权重值存在差异,分析比较得知,权重差异性与熵值法的计算原理和方法有关,同时也与评车师的个人喜好存在一定关联。For determining the weight indexes of subjective evaluating indexes for automobile dynamic performance objectively, entropy method is applied. The fundamental and calculating steps of entropy method are introduced. Combining with the basic idea of AHP, the subjective evaluation system as well as the test road and condition are determined. Five vehicles are tested by 3 appraisers. By using the ten-point scoring method, the scores of different indicators are obtained. Then, the total evaluating score of 5 vehicles are weighted and acquired by entropy method. The result shows that （1） the entropy method based on the objective data, can commendably determine the weight coefficients of evaluation indexes and has good objectivity; （2） there are differences among the same weights resulted from different appraisers. With analysis and comparison, it proves that these differences of weights are related to the calculation principle and method of entropy method and the appraisers＇ preference.

关 键 词：汽车工程 动力性能 熵值法 权重系数 主观评价 

分 类 号：U461.2[机械工程—车辆工程]