|Table of Contents|

Speed optimization for active-safety system of intelligent connected vehicles on expressways with crossing pedestrians(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2024年6期
Page:
135-144
Research Field:
交通工程
Publishing date:

Info

Title:
Speed optimization for active-safety system of intelligent connected vehicles on expressways with crossing pedestrians
Author(s):
LIU Qing-ling;  XU Xiao-wen
(School of Automation, Northwestern Polytechnical University, Xi'an 710072, Shaanxi, China)
Keywords:
traffic engineering;  intelligent connected vehicle;  speed strategy optimization;  expressway;  crossing intention of pedestrian
PACS:
U491
DOI:
10.19721/j.cnki.1671-8879.2024.06.013
Abstract:
Aim at the traffic scene that the crossing intention of wait-to-cross pedestrians at the roadside of urban expressways is random, a joint optimization model considering of the boundary of the safe space and the speed of vehicles as well as its approximate optimization model were proposed, and the vehicle's speed control strategy was obtained by optimization to guide vehicle's driving behaviors. First, an active control mechanism based on the safe space and how to define the boundary of the safe space were proposed, by setting up the safe space at the upstream of the pedestrians.Then, a joint optimization model considering of the boundary of the safe space and the speed of vehicles was proposed based on the optimal control theory. And then, the approximate optimization model was put forward. Finally, the boundary of the safe space and the vehicle's speed control strategy were obtained by optimization and further tested by MATLAB and VISSIM. The results show that the active control mechanism based on the safe space can make the upstream high-speed vehicles decelerate in advance and take a second look to take action, which can ensure the safety of the vehicle and the wait-to-cross pedestrians, and that the speed control strategy of the above mentioned traffic scene can not only make the vehicles decelerate in advance to avoid collision, with the wait-to-cross pedestrians and guide the vehicle to take a smoother speed curve from the start of warning point to the observation point of the pedestrians, but also save fuel consumption and not reduce the traffic efficiency.2 tabs, 8 figs, 25 refs.

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Last Update: 2024-12-30