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A ramp signal feed-forward control method and system based on real-time simulation

A technology of feed-forward control and real-time simulation, which is applied in the traffic control system of road vehicles, traffic control system, and traffic signal control. Ramp co-overflow phenomenon and other problems, to achieve good portability, simple and robust parameter setting, good control effect

Active Publication Date: 2020-06-30
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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  • A ramp signal feed-forward control method and system based on real-time simulation
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  • A ramp signal feed-forward control method and system based on real-time simulation

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Embodiment Construction

[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 feed-forward control method and system based on real-time simulation. Based on real-time data, a ramp signal feed-forward control scheme is generated, and the operation status of a confluence area is analyzed in real time. The method of the present invention is based on the actual trajectory data analysis of the merge area, and establishes a cellular automaton model considering the dynamic mechanism of the merge area and the driving behavior of Chinese drivers; uses the detector data and the cellular simulation model to judge the operating state of the expressway merge area in the next cycle; establishes The feed-forward ramp control algorithm based on traffic simulation quickly solves the signal control scheme through discrete search in the feasible region. The system of the invention integrates traffic simulation, short-term prediction, ramp control and effect evaluation, and provides an intelligent auxiliary decision-making analysis tool for the ramp control of the expressway entrance. Compared with the prior art, the present invention can quickly and accurately control the ramp of the expressway, overcomes the limitations of traditional feedback ramp control hysteresis and difficulty in parameter calibration, and has real-time performance and operability.

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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Patent Type & Authority Patents(China)
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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