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A control method for congested traffic in the coupled map car-following model 总被引:1,自引:0,他引:1 下载免费PDF全文
Based on the pioneer work of Konishi et al, a new control
method is presented to suppress the traffic congestion in the
coupled map (CM) car-following model under an open boundary.
A control signal concluding the velocity differences of the two
vehicles in front is put forward. The condition under which the
traffic jam can be contained is analyzed. The results are
compared with that presented by Konishi et al [Phys.
Rev. 1999 E 60 4000--4007]. The simulation results show that
the temporal behavior obtained by our method is better than that by
the Konishi's et al. method, although both the methods could
suppress the traffic jam. The simulation results are consistent
with the theoretical analysis. 相似文献
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Based on the pioneering work of Konishi et al. [Phys. Rev. E (1999) 60 4000], a new feedback control scheme is presented to suppress traffic jams based on the coupled map car-following model under the open boundary condition. The effect of the safe headway on the traffic system is considered. According to the control theory, the condition under which traffic jams can be suppressed is analyzed. The results are compared with the previous results concerning congestion control. The simulations show that the suppression performance of our scheme on traffic jams is better than those of the previous schemes, although all the schemes can suppress traffic jams. The simulation results are consistent with theoretical analyses. 相似文献
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基于智能交通诱导信息,提出一种改进的耦合映射跟驰模型,用于描述单车道的交通流动力学特性及其拥堵控制.利用反馈控制理论,给出了在头车速度发生变化时交通流保持稳定的条件.分析结果表明,考虑前方更多车辆的信息对交通流有致稳作用,亦即稳定性条件明显减弱.数值模拟证实了理论分析的正确性,通过与他人相关工作的比较得知,考虑智能交通诱导信息能够更有效地抑制交通拥堵.
关键词:
交通流
智能交通系统
耦合映射跟驰模型
交通拥堵控制 相似文献
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A new coupled map car-following model considering drivers’ steady desired speed 总被引:2,自引:0,他引:2 下载免费PDF全文
Based on the pioneering work of Konishi et al., in consideration of the influence of drivers' steady desired speed ef/ect on the traffic flow, we develop a new coupled map car-following model in the real world. By use of the control theory, the stability condition of our model is derived. The validity of the present theoretical scheme is verified via numerical simulation, confirming the correctness of our theoretical analysis. 相似文献
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A control method applied to mixed traffic flow for the coupled-map car-following model 总被引:1,自引:0,他引:1 下载免费PDF全文
In light of previous work [Phys. Rev. E 60 4000 (1999)], a modified coupled-map car-following model is proposed by considering the headways of two successive vehicles in front of a considered vehicle described by the optimal velocity function. The non-jam conditions are given on the basis of control theory. Through simulation, we find that our model can exhibit a better effect as p = 0.65, which is a parameter in the optimal velocity function. The control scheme, which was proposed by Zhao and Gao, is introduced into the modified model and the feedback gain range is determined. In addition, a modified control method is applied to a mixed traffic system that consists of two types of vehicle. The range of gains is also obtained by theoretical analysis. Comparisons between our method and that of Zhao and Gao are carried out, and the corresponding numerical simulation results demonstrate that the temporal behavior of traffic flow obtained using our method is better than that proposed by Zhao and Gao in mixed traffic systems. 相似文献
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拥堵控制中, 通过车辆运行状态感知与控制的交互融合, 实现对车辆有效控制的过程, 具有信息物理融合系统的典型特征. 本文基于Konishi等的研究工作, 从交通信息系统与交通物理系统融合的角度, 进一步考虑优化速度差和安全间距对车流的影响, 在耦合映射跟驰模型中, 提出了一种考虑最邻近前车综合信息的交通拥堵反馈控制方案. 运用反馈控制理论, 给出了头车速度发生变化时交通流保持稳定的条件, 并与前人工作进行了比较. 理论分析与数值模拟结果一致表明, 耦合映射跟驰模型在本文提出的控制方案下能更有效地抑制交通拥堵.
关键词:
交通流
交通拥堵控制
耦合映射跟驰模型
信息物理融合系统 相似文献
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An improved car-following model with consideration of the lateral effect and its feedback control research 下载免费PDF全文
A car-following model is presented, in which the effects of non-motor vehicles on adjacent lanes are taken into ac- count. A control signal including the velocity differences between the following vehicle and the target vehicle is introduced according to the feedback control theory. The stability condition for the new model is derived. Numerical simulation is used to demonstrate the advantage of the new model including the control signal; the results are consistent with the analytical ones 相似文献
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A new car-following model is proposed by considering information from a number of preceding vehicles with intervehicle communication. A supernetwork architecture is first described, which has two layers: a traffic network and a communication network. The two networks interact with and depend on each other. The error dynamic system around the steady state of the model is theoretically analyzed and some nonjam criteria are derived. A simple control signal is added to the model to analyze the criteria of suppressing traffic jams. The corresponding numerical simulations confirm the correctness of the theoretical analysis. Compared with previous studies concerning coupled map models, the controlled model proposed in this paper is more reasonable and also more effective in the sense that it takes into account the formation of traffic congestion. 相似文献
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The full velocity difference model proposed by Jiang et
al. [2001 Phys. Rev. E 64 017101] has been improved
by introducing velocity anticipation. Velocity anticipation means
the follower estimates the future velocity of the leader. The
stability condition of the new model is obtained by using the linear
stability theory. Theoretical results show that the stability region
increases when we increase the anticipation time interval. The mKdV
equation is derived to describe the kink--antikink soliton wave and
obtain the coexisting stability line. The delay time of car motion
and kinematic wave speed at jam density are obtained in this model.
Numerical simulations exhibit that when we increase the anticipation
time interval enough, the new model could avoid accidents under
urgent braking cases. Also, the traffic jam could be suppressed by
considering the anticipation velocity. All results demonstrate that
this model is an improvement on the full velocity difference model. 相似文献
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Based on the pioneer work of Konishi et al., a new control method is proposed to suppress the traffic congestion in the coupled map (CM) car-following model under open boundary condition. The influence of the following car to the system has been considered. Our method and that presented by Konishi et al. [Phys. Rev. E 60 (1999) 4000] are compared. Although both the methods could suppress the traffic jam, the simulation results show that the temporal behavior obtained by ours is better than that proposed by the Konishi's et al. The simulation results are consistent with the theoretical analysis. 相似文献
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CO2 emission control in new CM car-following model with feedback control of the optimal estimation of velocity difference under V2X environment 下载免费PDF全文
Guang-Han Peng 《中国物理 B》2021,30(10):108901-108901
A new coupled map car-following model in this paper is proposed by considering the influence of the difference of the estimated optimal speed based on the coupled map (CM) car-following model under V2X environment. The stability of the new model is analyzed by applying the control theory, and the conditions are obtained for the stability of the traffic system. And the two scenes of vehicle stopping once and four times have been simulated. The simulation results show that the control term considered with optimal estimation of speed difference can effectively improve the stability of vehicle running and reduce CO2 emissions in the CM car-following model. 相似文献
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A novel car-following model by sharing cooperative information transmission delayed effect under V2X environment and its additional energy consumption 下载免费PDF全文
Guang-Han Peng 《中国物理 B》2022,31(5):58901-058901
A novel car-following model is offered based on the cooperative information transmission delayed effect involving headway and velocity under V2X environment. The stability conditions and mKdV equation of the new model are obtained via the linear and nonlinear analysis. Through numerical simulation, the variation trend of headway and hysteresis phenomenon are studied. In addition, we investigate the additional energy consumption of the vehicle during acceleration. In brief, theoretical analysis and simulation results confirm that the new car-following model based on the cooperative information transmission delayed effect can improve traffic stability and reduce additional energy consumption. 相似文献
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Based on the pioneer work of Konishi et al., a new control method is proposed to suppress the traffic congestion in the coupled map (CM) car-following model under open boundary condition. The influence of the following car to the system has been considered. Our method and that presented by Konishi et al. [Phys. Rev. E 60 (1999) 4000] are compared. Although both the methods could suppress the traffic jam, the simulation results show that thetemporal behavior obtained by ours is better than that proposed by the Konishi's et al. The simulation results are consistent with the theoretical analysis. 相似文献
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On the basis of the full velocity difference (FVD) model,
an improved multiple car-following (MCF) model is proposed by taking
into account multiple information inputs from preceding vehicles.
The linear stability condition of the model is obtained by using the
linear stability theory. Through nonlinear analysis, a modified
Korteweg-de Vries equation is constructed and solved. The traffic
jam can thus be described by the kink--antikink soliton solution for
the mKdV equation. The improvement of this new model over the
previous ones lies in the fact that it not only theoretically retains many
strong points of the previous ones, but also performs more
realistically than others in the dynamical evolution of congestion.
Furthermore, numerical simulation of traffic dynamics shows that the
proposed model can avoid the disadvantage of negative velocity that
occurs at small sensitivity coefficients λ in the FVD model by
adjusting the information on the multiple leading vehicles. No
collision occurs and no unrealistic deceleration appears in the
improved model. 相似文献
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从研究微观个体车辆行为出发,考虑车辆加速过程的不确定性,提出了随机计及相对速度的 交通流跟驰模型(SR-OV模型).对随机相对速度的跟驰模型的动力学方程进行稳定性分析,得 到与Bando跟驰模型不同的稳定性判据,其稳定性优于Bando模型.运用摄动理论分析交通过 程中密度波的变化,结果表明,在发生交通阻塞相变时,交通密度波以mKdV方程描述的扭结 -反扭结波演化.对随机相对速度跟驰模型进行数值模拟和分析,结果发现车流速度的变化小 于Bando模型的速度变化,而且与随机概率有关,当随机考虑相对速度的概率增大时,初始 的小扰动不会放大对车流产生影响,甚至长时间就消失,这与Bando模型完全不同.数值模拟 所得到的相图与解析解相符合,而且交通流稳定区域大于Bando模型.从车间距-速度演化图上 ,随着随机概率的增大,SR-OV模型在初始时存在的滞后现象,随着时间的增长,趋于稳定 状态后,滞后曲线收敛于一小区域,滞后效应被削弱.这完全不同于Bando模型,在Bando模 型中,滞后曲线由一点向外扩散,滞后曲线区域越来越大,车流趋于不稳定状态.
关键词:
交通流
跟驰模型
稳定性判据
相对速度 相似文献
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An improved multiple car-following model is proposed by
considering the arbitrary number of preceding cars, which includes
both the headway and the velocity difference of multiple preceding
cars. The stability condition of the extended model is obtained by
using the linear stability theory. The modified Korteweg--de Vries
equation is derived to describe the traffic behaviour near the
critical point by applying the nonlinear analysis. Traffic flow can
be also divided into three regions: stable, metastable and unstable
regions. Numerical simulation is accordance with the analytical
result for the model. And numerical simulation shows that the
stabilisation of traffic is increasing by considering the
information of more leading cars and there is unavoidable effect on
traffic flow from the multiple leading cars' information. 相似文献
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为了更加客观地描述实际的车辆跟驰行为, 在优化速度模型的基础上, 通过引入横向分离参数并提出超车期望和虚拟前车的概念, 建立了考虑横向分离与超车期望的车辆跟驰模型.对模型进行线性稳定性分析, 得到了模型稳定性条件, 发现车辆横向分离、超车期望和虚拟前车的位置的增加, 在车流密度较小、车速较快的情况下, 使得交通流稳定区域增大, 但在车流密度较大、车速较慢的情况下, 反而使得交通流稳定区域减小.数值模拟结果验证了模型稳定性分析的结果, 表明在交通瓶颈处等交通流密度较大、运行缓慢的区域, 为抑制交通拥堵, 应该限制车辆的横向偏移和超车行为的发生.
关键词:
交通流
车辆跟驰模型
横向分离
超车期望 相似文献