网联环境下混合车流的速度协调优化方法研究  

Research on speed coordination and optimization method of mixed traffic flow in networked environment

作　　者：宋晓晨 曲大义 贾彦峰 胡春燕 刘浩敏 SONG Xiao-chen;QU Da-yi;JIA Yan-feng;HU Chun-yan;LIU Hao-min(School of Mechanical and Automotive Engineering,Qingdao University of Technology,Qingdao 266520,China)

机构地区：[1]青岛理工大学机械与汽车工程学院,山东青岛266520

出　　处：《广西大学学报（自然科学版）》2022年第3期804-812,共9页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金项目(51678320)。

摘　　要：为了消除高速公路混合交通流波动所带来的不良影响,提出一种基于前车轨迹的速度协调优化方法。首先利用Newell跟驰理论对前车的运行轨迹进行偏移,再利用三角形基本图(KWT模型)对偏移的轨迹进行修正以提高对下游车队尾端HV轨迹的预测精度,然后通过预测的轨迹协调控制上游车队CAV首车在各个时刻的车速,引导上游CAV平稳顺利汇入下游车流来抑制速度震荡造成的交通流波动,最后通过数值仿真分别讨论了20%、40%、60%的CAV渗透率对速度震荡传播的抑制效果。结果表明:CAV的渗透率越大,对抑制速度震荡传播的作用越大,验证了该方法能有效提高交通流稳定性并提升道路通行能力与安全。In order to eliminate the adverse effects caused by the fluctuation of the mixed traffic flow on the expressway,a speed coordination optimization method based on the trajectory of the preceding vehicle is proposed.First,the Newell car-following theory was used to offset the trajectory of the preceding vehicle,and then the triangular basic diagram(KWT model)was used to modify the offset trajectory to improve the prediction accuracy of the HV trajectory at the tail end of the downstream convoy,and then according to the predicted trajectory coordinately control the speed of the first vehicle of the upstream convoy CAV at each moment,and guide the upstream CAV to smoothly merge into the downstream traffic flow to suppress the fluctuations in traffic flow caused by speed fluctuations.Finally,the suppression effect of CAV permeability of 20%,40%,and 60%on velocity oscillation propagation is discussed by numerical simulations.The results show that the greater the permeability of CAV is,the greater the effect on suppressing the propagation of speed shocks is.This method can effectively improve the stability of traffic flow and enhance the road capacity and safety.

关 键 词：智能网联 交通震荡 混合交通流 速度协调优化 仿真分析 

分 类 号：U491[交通运输工程—交通运输规划与管理]