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Variable speed-limiting control method based on artificial immune particle swarm algorithm

A technology of particle swarm algorithm and artificial immunity, which is applied in the field of variable speed limit control based on artificial immune particle swarm algorithm, can solve problems such as unbalanced speed limit, lack of unified understanding and standardized design principles, and vehicle speed.

Inactive Publication Date: 2010-09-22
CHINA MERCHANTS CHONGQING COMM RES & DESIGN INST
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The defect of the prior art is that the unevenness of the vehicle speed is the main cause of vehicle safety accidents, and at present, the design speed of the machinery on the expressways of our country is used as the speed limit value, and there is no unified understanding and standardized design principles for the speed limit. There is no clear stipulation in this aspect in the standard, and it cannot solve the defect of unbalanced vehicle speed

Method used

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  • Variable speed-limiting control method based on artificial immune particle swarm algorithm
  • Variable speed-limiting control method based on artificial immune particle swarm algorithm
  • Variable speed-limiting control method based on artificial immune particle swarm algorithm

Examples

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Embodiment 1

[0052] Embodiment 1: as figure 1 As shown, a variable speed limit control method based on the artificial immune particle swarm algorithm is carried out as follows:

[0053] Step 1: Obtain the speeds of all vehicles passing through the same road section in N detection periods, calculate the initial speed limit value of each detection period according to the speed of all vehicles passing in each detection period, and determine the size of the particle population N=10, the maximum The number of iterations Tm=200, the initial maximum velocity v of the particles max初 and the initial furthest position x max初 ;Initial furthest position x max初 That is, the maximum value of the initial speed limit value of N particles. v max初 =α·x max初 , where α obeys the uniform distribution in the interval [0.1, 1.0] and takes a random value.

[0054] The speed limit value is related to many factors, and various factors should be considered comprehensively to calculate the speed limit value. Th...

Embodiment 2

[0156] This embodiment is roughly the same as Embodiment 1, and the difference is that the variance of the traffic speed after the speed limit is used as the fitness function, and the fitness value f(x i ) is calculated according to the following formula:

[0157] f ( x i ) = Σ j = 1 n ( V ij ' - V i ‾ ) 2 n

[0158] In the above formula: V' ij -----The speed of the jth car aft...

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Abstract

The invention discloses a variable speed-limiting control method based on the artificial immune particle swarm algorithm. The method is characterized by comprising the following steps: 1) calculating the initial speed-limiting values of N-numbered detection intervals, determining parameters; 2) determining N-numbered particles, establishing a initial particle swarm; 3) calculating the fitness value f(xi) of each particle in the particle swarm; 4) determining and storing the personal best particle and the global best particle; 5) judging whether to satisfy the iteration terminal condition, if so, inputting the optimal speed-limiting value, if not, entering the step 6; and 6) updating the particle swarm to generate a new generation of swarm, and returning to the step 2. The invention controls the running speed of vehicles to adjust the running speed and maintain the balanced running speed, thus avoiding the occurrence of rear-end collisions or collision accidents.

Description

technical field [0001] The invention belongs to the field of tunnel safety, and in particular relates to a variable speed limit control method based on artificial immune particle swarm algorithm. Background technique [0002] In recent years, with the rapid development of expressway construction in my country, especially the construction of expressways in mountainous areas, the road tunnels are constantly developing in the direction of long and large. However, the following road tunnel safety problems are becoming more and more serious. Therefore, tunnel safety has become a topic of increasing concern both at home and abroad. The speed of vehicles is one of the main causes of abnormal traffic in tunnels. At present, vehicle safety accidents are mainly due to uneven speed and insufficient safety distance between vehicles, which leads to an increase in the proportion of overtaking and braking, and the possibility of accidents increases accordingly, especially the occurrence o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/01G08G1/052G08G1/16G06N3/00
Inventor 韩直田登易富君
Owner CHINA MERCHANTS CHONGQING COMM RES & DESIGN INST
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