基于层次分析法的汽车制动性能主观评价指标权重研究

Research on Weights of Subjective Evaluation of Automobile Braking Performance Based on AHP

为了确定汽车制动性能主观评价指标的权重系数,采用层次分析法,将制动性能指标分解为制动稳定性、制动舒适性等6个准则层,以及直线制动方向、制动俯仰等13个方案层。选取3名专业评车师,对两辆车按照规定的试验道路及工况进行实车试验,对底层评价指标按照十分制打分法进行评分,利用各指标分值计算权重系数,加权得到总分。结果表明,制动性能指标权重系数从大到小依次为:制动减速度、制动稳定性、制动热稳定性、制动操纵性、制动舒适性、制动踏板;加权后得到两车总分,明显比较出A车性能优于B车。

In order to determine the weight coefficient of evaluation indicators for vehicle brake performance, by adopting analytic hierarchy process （AHP） , the braking performance indexes are divided into 6 criterion layers such as braking stability and braking comfort, and 13 scheme layers such as braking direction and braking pitch. Two vehicles are tested on the specified test road under specified conditions. Based on the ten- point scoring method, the score of each index of the bottom layer is given, the weight coefficient and the total score of each vehicle is calculated accordingly by selected 3 professional appraisers. The result shows that the weight coefficient of braking performance ranks in the follow order from large to small ： braking deceleration, braking stability, braking thermostability, braking maneuverability, braking comfort, braking pedal ; （ 2 ） according to the total scores acquired by weighing method, it is obviously that the performance of vehicle A is superior to vehicle B.