摘要
在传统的基于车头时距的安全距离模型和基于制动过程的安全距离模型的研究基础上,针对前导车分别处于静止、匀速和匀减速等不同行驶状态,相应地建立了单车道跟驰状态下跟随车与前导车不发生追尾碰撞的最小安全距离模型,并充分考虑了车辆制动过程中减速度渐变的过程,避免了以往模型中采用制动减速度突变的问题。最后,通过M atlab仿真系统对改进模型和传统模型进行了同等条件下的仿真,仿真数据从理论上验证了改进模型能够很好地解决传统模型计算的安全距离存在较大偏差的问题,可为今后研究跟驰模型提供一定的参考。
On the basis of the research of two traditional safety distance models which based on headway and braking process,in connection with the leading vehicle in static,uniform speed,and uniform deceleration driving states,a model of minimum safety distance for collision avoidance between the following and the leading vehicles was established considering the vehicle gradual deceleration in braking process for avoiding deceleration mutation in the old models.At last,the simulation for the improved model and the tradition one was performed with Matlab under the same condition.The Simulation data shows that the improved model could resolve the inaccurate defects in computing safety distance by the tradition models and provide a reference for the future research of car-following model.
出处
《公路交通科技》
CAS
CSCD
北大核心
2010年第10期95-100,106,共7页
Journal of Highway and Transportation Research and Development
基金
国家自然科学基金资助项目(60664001)
江西省教育厅科技项目(GJJ10481)
关键词
交通工程
车辆跟驰模型
仿真
安全距离
交通流
traffic engineering
car-following model
simulation
safety distance
traffic flow
作者简介
许论辉（1965-），男，江西南康人，教授，博导，研究方向为交通系统建模与仿真（lhxu@scut．edu．cn）
