考虑形态参数的自动驾驶卡车编队油耗分析OA北大核心

Air drag and fuel consumption of an autonomous truck platoon are critically influenced by its morpholog-ical parameters:longitudinal interval,lateral offset,lateral distribution mode,and number of vehicles.A comprehen-sive analysis of morphological parameters'impact on truck platoon fuel consumption can facilitate the rational for-mulation of truck platoon,optimize fuel-saving rates,and provide data for further evaluation of economic benefits.Based on the driving data,343 two-truck platoons and 2 401 three-truck platoons with different morphological pa-rameters are proposed.Using a three-dimensional unstructured grid modeling method,models of all these truck pla-toons have been developed.Air drag coefficients of all platoons are calculated by computational fluid dynamics sim-ulations.With these air drag coefficients and a method for calculating fuel consumption,fuel consumption estima-tion of all platoons has been analyzed using Monte Carlo simulation.The results show that smaller longitudinal in-tervals and lateral offsets are more conducive to reducing the fuel consumption of a platoon,and a three-truck pla-toon exhibit superior fuel-saving performance compared to a two-truck platoon.For a two-truck platoon,air drag co-efficients of its leader truck and its tail truck are 87.43%～100.6%and 58.0%～76.30%of that of a single truck re-spectively.For a three-truck platoon,the air drag coefficients of the leader truck,the middle truck and the tail truck are 84.19%～100.9%,45.65%～81.19%and 45.24%～77.20%of that of a single truck respectively.For a dynamic truck platoon,adverse effect caused by lateral offset has been eliminated by the proposed lateral distribution mode.While the longitudinal interval equals six meters and lateral offset distributes within 90 cm with a normal distribu-tion,average fuel saving rates of a two-truck platoon and a three-truck platoon are 10.71%and 15.65%,respectively.