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Ramp signal feedforward control method and system based on real-time simulation

A feedforward control, real-time simulation technology, applied in the direction of road vehicle traffic control system, traffic control system, traffic signal control, etc., can solve the problem of difficult to meet the high real-time requirements of ramp control, difficult to calibrate ZONE algorithm parameters, not considering the entrance. The problem of ramp co-overflow phenomenon, etc., achieves good portability, simple and robust parameter setting, and good control effect.

Active Publication Date: 2019-07-30
SOUTHEAST UNIV
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Problems solved by technology

[0004] The ALINEA algorithm does not consider the overflow phenomenon caused by queuing on the entrance ramp, and the result is completely based on expected values; the parameters of the ZONE algorithm are difficult to calibrate; the neural network uses feedback rules to maintain the ideal occupancy detection output, and its learning time is relatively long, which is difficult to meet the ramp. High real-time requirements for control

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  • Ramp signal feedforward control method and system based on real-time simulation
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  • Ramp signal feedforward control method and system based on real-time simulation

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[0042] The principles, features and technical solutions of the present invention will be described in detail below through the embodiments and in conjunction with the accompanying drawings.

[0043] A ramp signal feed-forward control method based on real-time simulation disclosed in the embodiment of the present invention, the main process of the method is as follows figure 1 , 2 shown, including the following steps:

[0044] (1) Obtain the flow rate and vehicle speed of the upstream main line, the downstream main line and the ramp measured by the traffic flow detector located at the upstream of the expressway ramp, the downstream of the ramp, and the traffic lights at the entrance of the ramp;

[0045] (2) Input the data measured by the traffic flow detector as boundary conditions into the cellular simulation model to judge the operating status of the expressway merge area in the next cycle. Set congestion points at the boundary; formulate ramp signal control scheme, and us...

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Abstract

The invention discloses a ramp signal feedforward control method and system based on real-time simulation. Based on real-time data, a ramp signal feedforward control scheme is generated, and running conditions of a confluence region are analyzed in real time. The method comprises the following steps of establishing a cellular automata model considering a dynamic mechanism of the confluence regionand a driving behavior of a Chinese driver based on the actual trajectory data analysis of the confluence area; judging the running state of a next-cycle fast-road confluence region by utilizing detector data and a cellular simulation model; and establishing a feedforward ramp control algorithm based on traffic simulation, and rapidly solving a signal control scheme through discrete searching in afeasible domain. The system of the invention integrates traffic simulation, short-time prediction, ramp control and effect evaluation, and provides an intelligent auxiliary decision analysis tool forfast road entrance ramp control. Compared with the prior art, fast road ramp control can be carried out quickly and accurately, the limitation of traditional feedback ramp control hysteresis and parameter calibration is overcome, and real-time performance and operability are achieved.

Description

technical field [0001] The invention relates to the field of ramp traffic management and control, in particular to a ramp signal feed-forward control method and system based on cellular automata model real-time simulation. Background technique [0002] The operation of traffic flow in the weaving area of ​​expressways is complex, and it is easy to form traffic congestion and become a bottleneck restricting urban traffic. Therefore, it is of great significance to study and manage the traffic flow in weaving areas of expressways. On-ramp control is one of the effective means to control the weaving area of ​​the expressway and control the congestion of the expressway network. It uses ramp signal lights to adjust the flow rate of vehicles entering the main line of the expressway, so as to ensure that the performance indicators of the expressway operate at the best state of the system Nearby, there are benefits such as relieving congestion, increasing the safety of transfer vehic...

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Application Information

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IPC IPC(8): G08G1/07
CPCG08G1/075
Inventor 王昊张科扬刘芷辰雷明月张嘉旭
Owner SOUTHEAST UNIV
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