Effects of connected automated vehicle on stability and energy consumption of heterogeneous traffic flow system  

作　　者：申瑾 赵建东 刘华清 姜锐 余智鑫 Jin Shen;Jian-Dong Zhao;Hua-Qing Liu;Rui Jiang;Zhi-Xin Yu(School of Systems Science,Beijing Jiaotong University,Beijing 100044,China;Key Laboratory of Transport Industry of Big Data Application Technologies for Comprehensive Transport,Beijing Jiaotong University,Beijing 100044,China;School of Maritime and Transportation,Ningbo University,Ningbo 315000,China)

机构地区：[1]School of Systems Science,Beijing Jiaotong University,Beijing 100044,China [2]Key Laboratory of Transport Industry of Big Data Application Technologies for Comprehensive Transport,Beijing Jiaotong University,Beijing 100044,China [3]School of Maritime and Transportation,Ningbo University,Ningbo 315000,China

出　　处：《Chinese Physics B》2024年第3期291-301,共11页中国物理B（英文版）

基　　金：Project supported by the Fundamental Research Funds for Central Universities,China(Grant No.2022YJS065);the National Natural Science Foundation of China(Grant Nos.72288101 and 72371019).

摘　　要：With the development of intelligent and interconnected traffic system,a convergence of traffic stream is anticipated in the foreseeable future,where both connected automated vehicle(CAV)and human driven vehicle(HDV)will coexist.In order to examine the effect of CAV on the overall stability and energy consumption of such a heterogeneous traffic system,we first take into account the interrelated perception of distance and speed by CAV to establish a macroscopic dynamic model through utilizing the full velocity difference(FVD)model.Subsequently,adopting the linear stability theory,we propose the linear stability condition for the model through using the small perturbation method,and the validity of the heterogeneous model is verified by comparing with the FVD model.Through nonlinear theoretical analysis,we further derive the KdV-Burgers equation,which captures the propagation characteristics of traffic density waves.Finally,by numerical simulation experiments through utilizing a macroscopic model of heterogeneous traffic flow,the effect of CAV permeability on the stability of density wave in heterogeneous traffic flow and the energy consumption of the traffic system is investigated.Subsequent analysis reveals emergent traffic phenomena.The experimental findings demonstrate that as CAV permeability increases,the ability to dampen the propagation of fluctuations in heterogeneous traffic flow gradually intensifies when giving system perturbation,leading to enhanced stability of the traffic system.Furthermore,higher initial traffic density renders the traffic system more susceptible to congestion,resulting in local clustering effect and stop-and-go traffic phenomenon.Remarkably,the total energy consumption of the heterogeneous traffic system exhibits a gradual decline with CAV permeability increasing.Further evidence has demonstrated the positive influence of CAV on heterogeneous traffic flow.This research contributes to providing theoretical guidance for future CAV applications,aiming to enhance urban road traffic effi

关 键 词：heterogeneous traffic flow CAV linear stability nonlinear stability energy consumption 

分 类 号：U491[交通运输工程—交通运输规划与管理]