Macroscopic traffic flow model branch-and-bound analysis and control method for blocking road

Abstract

The invention relates to a system theory analysis and control method, in particular to a macroscopic traffic flow model branch-and-bound analysis and control method for blocking a road, and belongs to the field of road traffic flow analysis and control. According to the method, two equivalent variable substitutions are introduced to transform a traffic flow problem into a system stability problem, and therefore whether the traffic is blocked up or other abnormal phenomena are caused is judged macroscopically from the point of overall stability. Branch-and-bound analysis is carried out on the model after equivalence transformation, the balance point of the system is solved uniformly, and branch points causing the change of the character of the system are found out. Corresponding control schemes are designed according to the different branch points, the unstable branch points of the system are changed into the stable branch points, or the unstable branch points are removed to be changed into the stable area of the system, namely, the stable running state of the traffic flow, and the actual operation can be achieved by controlling the opening and closing time of an entrance ramp adjusting rod and setting a variable information display board.

Description

technical field [0001] The invention relates to a system theory analysis control method, in particular to a branch-and-bound analysis control method of a closed road macro traffic flow model. Background technique [0002] While modern transportation promotes social and economic development, the traffic congestion problem is becoming more and more serious. The specific performance is that the congestion is more and more frequent, and the duration of the congestion is getting longer and longer. Even in closed roads, traffic congestion often occurs. Phenomenon. Studying the traffic problem of closed roads and designing control strategies through the analysis method of system theory to replace the traditional manual adjustment control is a solution to alleviate the current traffic congestion problem. [0003] The complexity of the traffic system is even more complicated than people imagined. It involves comprehensive control of urban traffic network, comprehensive collection of...

AI Technical Summary

Problems solved by technology

Most of the existing research on traffic flow is based on the approximate description and simple explanation of some traffic phenomena on the basis of mechanism research, or on the basis of previous research, some influencing factors are considered, and tentative methods are used to change the value of some parameters. , to make it approximate to the corresponding traffic phenomenon, and there is no essential explanation of the reasons for this phenomenon from the perspective of system theory, and the traffic congestion conditions cannot be directly given, especially when various traffic parameters change. The overall description of the system makes it difficult for traffic system researchers to use it directly, and many control methods cannot be effectively applied

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