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Express way access ramp control method and system based on switching system characteristics

A technology for switching systems and control methods, applied in traffic control systems, control traffic signals, traffic control systems for road vehicles, etc.

Inactive Publication Date: 2017-06-13
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The primary purpose of the present invention is to provide a method of iteratively learning expressway entrance ramp control based on switching system characteristics, which can solve the problem of control of expressways with ramp intersections with switching system characteristics

Method used

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  • Express way access ramp control method and system based on switching system characteristics
  • Express way access ramp control method and system based on switching system characteristics
  • Express way access ramp control method and system based on switching system characteristics

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Such as figure 1 As shown, an iterative learning method for controlling the on-ramp of expressways based on the characteristics of the switching system includes the following steps:

[0042] 101. Obtain the actual traffic flow density of the current expressway and the traffic flow at the entrance of the ramp; first, obtain the actual output traffic flow density of the current iteration number and the traffic flow at the entrance of the ramp.

[0043] 102. Obtain the expected traffic flow density value of the expressway;

[0044] 103. Obtain the current error function e of the method according to the actual traffic flow density and the expected traffic flow density value k (t);

[0045] After obtaining the actual traffic flow density value of the current expressway and the expected traffic flow density value of the expressway, according to the difference between the expected traffic flow density value of the expressway and the actual traffic flow density value of the c...

Embodiment 2

[0091] Such as Figure 7 As shown, an iterative learning expressway on-ramp control system based on switching system characteristics, including:

[0092] Current traffic flow acquisition module 701: used to acquire the actual traffic flow density value of the current expressway and the traffic flow at the entrance of the ramp;

[0093] Expected traffic flow acquisition module 702: used to acquire the expected traffic flow density value of the expressway;

[0094] Error function acquisition module 703: used to obtain the current error function according to the actual traffic flow density value and the expected traffic flow density value;

[0095] Iterative learning law and learning gain setting module 704: used to set the iterative learning control law and iterative learning gain based on the characteristics of the switching system according to the error function, wherein the iterative learning control law based on the characteristics of the switching system is expressed as fo...

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Abstract

The invention provides an express way access ramp control method and system based on switching system characteristics. The method includes acquiring a current error function according to an actual traffic flow density value and an expected traffic flow density value; setting an iterative learning control law and iterative learning gain according to the switching system characteristics according to the error function; applying the iterative learning control law based on the switching system characteristics to an express way system provided with a ramp access so as to enable the express way to reach the expected traffic flow density in a specific iteration number. Since parameters of an express way model system change along with influential factors including weather, road condition and the like in practical application, the express way system meets switching system characteristics. The method provided by the invention can solve a problem of control of the express way having the switching system characteristics and provided with the ramp access and meet practical requirements better.

Description

technical field [0001] The invention relates to the field of intelligent transportation, and more specifically, to a method for controlling an expressway entrance ramp based on switching system characteristics. Background technique [0002] On-ramp control of expressway is a very important part in the field of intelligent traffic control. The traffic flow model is repetitive every day. The traffic flow starts at midnight with a small density until the number of vehicles increases, that is, the morning peak, and then maintains a stable range until the evening peak. Based on this observation, it can be seen that there is reproducibility. In addition, in practice, affected by factors such as weather and road conditions, the parameters of the expressway model system change accordingly, so the expressway system conforms to the characteristics of the switching system. The previous research results did not consider this feature more, and could not better meet the actual needs, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/07G08G1/08
CPCG08G1/075G08G1/08
Inventor 孙淑婷李晓东钟任新万凯
Owner SUN YAT SEN UNIV
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