混合交通流元胞自动机FI模型的能耗研究

Study on the energy consumption of cellular automaton FI model for mixed traffic flow

研究了在周期边界条件下,最大速度、混合比例、车辆长度、随机减速概率对(fukui-ishibashi,FI)交通流模型能耗的影响.数值模拟结果表明,FI交通流模型的能耗随着车辆最大速度的增大而增加;随着混合比C的增大而增加,长车的比例越多能耗越大;随长车车长的增长而增加.FI交通流模型的能耗不同于NaSch模型能耗,对于FI交通流模型,在最大流量之处交通能耗发生下降的突变趋于零,其左右各存在交通能耗极大值.

Based on the Fukui-Ishibashi model （FI model）,the energy consumption in the mixed traffic flow is investigated via considering three factors： maximum velocity,length of vehicle,and the ratio of the mixed traffic flow.Simulations and analyses indicate that the energy consumption of the mixed traffic flow with the same length and different maximum velocities is related to the slow maximum velocity and its ratio.The slower the maximum velocity and its ratiare,the more energy will be consumed.Moreover,for the mixed traffic flow with the same maximum velocity and different lengths of vehicle,the energy consumption is related to the ratio of mixed vehicles.Longer vehicles induce more energy consumption.For a mixed traffic flow with the different maximum velocities and lengths of vehicle,its energy consumption is determined by the ratio of the mixed vehicles and delay probability p.The energy consumption of FI model drops off suddenly and trends to zero at the maximum flow rate,where there exits a maximum peak,which is significantly different from the result from the NaSch model.