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Control method of city intersection model reference self-adaptive signals

An adaptive signal and model reference technology, applied in the field of intelligent transportation, can solve problems such as the difficulty of establishing a state transition matrix model

Inactive Publication Date: 2014-11-05
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

However, due to the complexity of the intersection system, the state transition matrix model is difficult to establish

Method used

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  • Control method of city intersection model reference self-adaptive signals
  • Control method of city intersection model reference self-adaptive signals
  • Control method of city intersection model reference self-adaptive signals

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Embodiment Construction

[0030] The technical solution of the invention will be described in detail below in conjunction with the accompanying drawings.

[0031] As shown in Figure 1, there are four phases in the phase change of the studied road intersection. Phase 1 is shown in Figure 1(a) as going straight from north to south, and phase 2 is shown in Figure 1(b) as turning left from north to south. Phase 3, as shown in Figure 1(c), is going straight from east to west, and Phase 4, as shown in Figure 1(d), is turning east-west to the left. In this invention, considering that if there is a dedicated right-turn lane at the intersection, the conflict between the right-turn vehicle and vehicles in other directions is small, and the special green light phase is not considered.

[0032] The expected number of stranded vehicles y in the i-th phase mi It is output by the Petri net model of the intersection, and the timing scheme of the Petri net model of the intersection is determined by the signal initial ...

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Abstract

The invention discloses a control method for city intersection model reference self-adaptive signals and belongs to the technical field of intelligent traffic. A feedback control system, which is formed by the control method according to a reference model of a Petri network, corrects difference values of practical stranded vehicle numbers and expected stranded vehicle numbers at different phases according to expectation DC vehicle numbers output by the reference model of the Petri network so as to correct prolonging times of the phases, and then practical phase signals at intersections are corrected by the prolonging times of the phases, a predicted traffic flow and initial phase signals so that the system has a stronger resisting capability for disturbance of the traffic flow. Compared with a scheme of the prior art, in which a timing plan is fixed, an intersection state transference matrix is established and then a feedback control method is introduced, the control method optimizes the control effect.

Description

technical field [0001] The invention discloses a control method for an urban intersection model reference adaptive signal, and belongs to the technical field of intelligent transportation. Background technique [0002] As the demand for motor vehicles increases, the problem of urban traffic congestion is increasingly serious. When a city develops to a certain extent, the urban layout is relatively fixed, and the cost of widening roads to reduce traffic congestion is too high. Therefore, in recent years, more and more researchers have taken the coordination of intersection signals as a research direction to achieve the purpose of alleviating traffic pressure. The urban intersection system is a complex large system, which has the characteristics of concurrency and synchronization. A common research method is to establish a delay model of intersection and port signals. By analyzing the running state of the system and using the relevant knowledge of statistics, the delay time...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/08
Inventor 陈复扬王瓅姜斌陈希韬
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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