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基于仿真的交通信号控制优化策略研究 总被引:1,自引:1,他引:1
根据道路流量,研究了利用灵活的控制策略提高交通控制的效率问题.针对信号控制交叉口实际流量动态变化的特征,在现有传统控制方法的基础上根据交叉口交通流的变化特点,提出采用可变车道控制模式的控制方法、单边轮放控制模式的控制方法,介绍了其潜在的适用条件、优势及特点,并在交通流量调查的的基础上,建立了交叉口的相应仿真模型,利用信号控制仿真软件Synchro验证了在高峰期不同控制方法的效果.仿真结果表明,所提出的控制方法适用于具有相应流量特点的交叉口,提高了信号交叉口的控制效率. 相似文献
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交叉口协调感应信号控制 总被引:1,自引:0,他引:1
介绍了传统的感应控制方法,着重对协调感应信号控制的基本原理,控制过程等进行了分析,并提出了解决问题的方法。分析了定时信号控制和感应信号控制的优缺点,对感应信号控制的进一步研究提出了几点看法。 相似文献
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强调了推动民营企业财务管理控制制度化的现实价值,在此基础上,以货币资金控制、销售与收款控制、采购与付款控制、成本费用控制为切入点,阐述了民营企业财务管理控制制度化的主要实现策略,旨在推动民营企业财务管理控制工作的升级. 相似文献
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加强成本控制提高公路建设效益 总被引:1,自引:0,他引:1
为了提高高速公路建设期投资控制的管理水平,阐述了建设项目成本控制的原则,从过程控制、费用控制、财务管理等方面阐述了投资成本控制的途径和方法,并对项目管理中有关成本的细节问题进行了分析与探讨. 相似文献
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建设工程的投资控制是财务监理工作的重要内容,包括投资决策阶段的投资控制、设计阶段的投资控制、建设准备阶段的投资控制以及施工阶段的投资控制。分析了在财务监理未能事先参与项目投资控制的情况下,产生的诸多投资控制隐患,阐述了财务监理在建设项目各阶段事先控制的重要作用,以期实现对整个建设工程项目投资的有效控制。 相似文献
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提出了一种单交叉口模糊信号控制方法,选取排队长度作为模糊控制器输入量,建立模糊控制规则库,并建立了车辆的延误模型。最后进行了计算机仿真,在多种车辆到达率的情况下,比较了模糊控制与传统的感应控制及定时控制的车辆平均延误,仿真结果表明,提出的控制方法能有效减少车辆在交叉口的延误,控制效果优于传统的控制方法。 相似文献
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车辆动力学稳定性控制的仿真研究 总被引:11,自引:0,他引:11
对车辆动力学稳定性控制的控制原理,控制策略,控制逻辑和算法进行了理论分析。在此基础上,对车辆动力学稳定性控制进行了仿真分析,结果表明,车辆动力学稳定性控制能够改善车辆在高速下或在滑路上转向时的操纵性和稳定性。 相似文献
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本文根据集成系统发展趋势,设计了一种多功能电机控制器控制架构,突出介绍集成式电机控制器内部主要元件的选型设计,同时着重说明系统的控制原理以及工作策略;然后文章根据控制策略,详细描述通信报文的设置内容;最后全文还介绍了电机控制器的故障等级分类和常见故障问题解析。以点带面,通篇文章为纯电动汽车提供了一种集成式电机控制器的设计方案。 相似文献
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Yuanjin Ji Jinsong Zhou 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2018,56(12):1883-1898
The source of torque ripple in a permanent-magnet synchronous motor was analysed. Based on the feedback of the rotating speed difference between the left and right wheels, the error value of torque ripple in an in-wheel motor was calculated. Next, a simulation model of active steering control of an independently rotating wheel (IRW) in an in-wheel motor was developed to investigate effects of torque ripple. The relationship between the accuracy of active steering control of an IRW in an in-wheel motor and wheel/rail profile was derived, and then the boundary conditions of active steering control were obtained. Finally, a method was proposed to improve the active steering control of an IRW by optimising the tread. 相似文献
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Jingyu Choi Kyunggook Bae Junbeom Wi Sunghyun Ahn Hyunsoo Kim 《International Journal of Automotive Technology》2018,19(1):147-157
In this paper, a design method for a PHEV hydraulic control system was proposed considering motor thermal management. Dynamic models of the target PHEV were developed including the hydraulic system, which consists of one mechanical and one electric oil pump. The required motor cooling flow was designed based on the motor temperature, which was obtained from a one-dimensional thermal equivalent circuit model including the heat source and oil spray cooling. Combining the PHEV powertrain model, hydraulic control system model, and the motor thermal model including the cooling system, an integrated simulator was developed for the target PHEV. Using the integrated simulator, the temperatures of MG1 and MG2 were investigated for various motor cooling flow rates when the PHEV underwent a highway driving cycle. The energy consumption of the hydraulic control system was also evaluated. It was found from the simulation results that a hydraulic control system of the target PHEV could be designed that satisfied the required flow for the motor cooling, lubrication and brake control using the design procedure proposed in this study. 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(1):108-122
ABSTRACTWe put forward three actuator placements of the high-speed train power bogie to improve the train hunting stability. The active control forces act on the frame, between the frame and the motor, and on the motor by the inertial or retractable actuator, respectively, based on the feedback states of vibration velocity of the front and rear end beams. The feedback gains and the motor suspension parameters in different cases are optimised with the two objectives of system stability margin and control effort. The required actuator outputs of the three cases are compared based on the theoretical analysis with a 8 DOF bogie model. The results show that the three control cases can effectively improve the hunting stability, especially at high speed. The active control of motor lateral movement is helpful to increase the dynamic vibration absorbing function of the motor flexible suspension, and the control output is obviously smaller than the other two control cases. In addition, the influence of system delay on stability was analysed and we could use or avoid the effects of delay on the stability. 相似文献
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