摘要
为了掌握山区高速公路的行驶舒适性水平及其关键影响因素,开展了自然驾驶行为试验。采集了多款小客车的加速度数据,得到了不同轴向加速度的峰值累积频率曲线、特征分位值和均方根值。分析结果表明:(1)加速度的幅值和特征分位值略低于减速度,不同的道路对象和车型会导致轴向加(减)速度出现差别,但绝大部分数据都低于较舒适阈值,因此具有良好的纵向舒适性;(2)第85分位横向加速度在0.38~1.1 m/s^2分布,不同车型、不同道路的差别比较明显;总的来看山区高速公路具有良好的横向舒适性;(3)在竖向舒适性方面,仅三菱车在极少数位置上会有不适的感觉,路面震动表现和彩色路面并不会导致乘员不舒适;(4)各轴向加速度的幅值差异很小,三个轴向的加速度加权均方根值是在"舒适"和"稍有不适"区间内分布。
To master the level of driving comfort on different types of highways, as well as the key factor to determine the comfort, on-road driving tests under natural behavior using real vehicles on expressways were conducted.Acceleration data of passenger cars were collected, and cumulative frequency profiles of peak acceleration of different axels were obtained, as well as the characteristic percentile values and RMS values, the results showed that： （1） Acceleration rates ax is slightly below the deceleration rate ab, the measured values of ax and ab of various cars and test roads are deferent, and both them are below the threshold value, therefore the travel on test expressways is comfort in longitudinal direction.（2） The 85th ay ranges from 0.38 to 1.1 m/s, there also exist differences between lateral acceleration ay of various test vehicles and roads, and expressways have good lateral driving comfort.（3） Only Mitsubishi car on a few sections can lead to discomfort riding in vertical axis, vibration marking and colored pavement don＆#39;t make occupants uncomfortable.（4） There exist slight differences between acceleration of various axels on expressways, and all expressways have excellent driving comfort, and the total root mean square of weighed acceleration of three axles is distributed in the range of ＆quot;comfort＆quot; and ＆quot;slightly discomfort＆quot;.
出处
《科学技术与工程》
北大核心
2017年第20期101-108,共8页
Science Technology and Engineering
基金
国家自然科学基金(51678099
51278514)
交通运输部应用基础研究项目(2015319814050)
重庆市科技计划(cstc2014jcyjA30024)资助
关键词
山区高速公路
行驶舒适性
轴向加速度
横向加速度
垂向加速度
均方根值
路面条件
mountain expressway
driving comfort
longitudinal acceleration
lateral acceleration
vertical acceleration
RMS
pavement condition
