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A dynamic collaborative scheduling method for double-yard bridges in container yards

A container yard and collaborative scheduling technology, applied in the field of automobiles and transportation, can solve the problems of difficult to meet double-field bridges, insufficient dynamic response, and long solution time, so as to improve the learning convergence speed, reduce vehicle waiting time, and reduce double-field bridges. The effect of bridge interference

Active Publication Date: 2022-05-10
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of method usually takes a long time to solve, and it is difficult to meet the requirements of the dynamic (online) scheduling instructions of the double yard bridge. It is more suitable for the static environment where the order of the yard tasks changes little.
At the same time, the busy large and medium-sized storage yard tasks have significant dynamics, and the yard bridge scheduling method based on mathematical programming and intelligent algorithms is likely to cause delays in dispatching instructions and insufficient dynamic response, making this type of method very useful in dynamic yard bridge scheduling problems. The actual application effect is greatly reduced

Method used

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  • A dynamic collaborative scheduling method for double-yard bridges in container yards
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  • A dynamic collaborative scheduling method for double-yard bridges in container yards

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Experimental program
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Embodiment 1

[0058] Such as Figure 1-4 As shown, the present embodiment provides a method for dynamic collaborative dispatching of double yard bridges in the container yard box area, that is: a dynamic selection method for the next task of the idle yard bridge, and the optimization goal is to minimize the loading and unloading collection trucks (stacking boxes) in the box area. ) The average waiting time of tasks. Basis condition information for optimal scheduling: 1) task information of loading and unloading trucks (stacking boxes) that have been waiting in the container area, including vehicle arrival time, target bay position, and time required for task execution; 2) loading and unloading that is about to arrive in the container area The task information of the collection card (stacking box), including the arrival time of the vehicle, the target bay, and the time required for task execution; 3) the bays where the two yard bridges are located in the current box area.

[0059] Based on ...

Embodiment 2

[0070] According to the operation data of a certain container terminal yard in the north as the background, an experiment of the technical solution of the present invention is designed, and its beneficial effect is analyzed. In the experiment, the arrival of the box area tasks (collectors) obeys the Poisson distribution (the mean is λ), and the stacking time of a single task obeys the uniform distribution on the interval [1.16, 1.64] (unit: min). The experimental parameters are shown in Table 1. Show.

[0071] Table 1 Experimental parameters

[0072] parameter item parameter value Yard length L(bay) 40 Mission arrival rate λ (vehicle / min) 0.3、0.5、0.7、0.75、0.8、0.85 Longitudinal movement speed of field bridge v(bay / min) 10 Average task loading and unloading time μ(min) 1.4

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Abstract

The invention discloses a method for dynamic collaborative dispatching of double yard bridges in a container yard, which includes step 1, using container yard operation simulation to simulate and learn the designed Q value table, and obtaining the Q value table after the simulation study; step 2, using The learned Q value table and action selection strategy dynamically generate the action instructions of the yard bridge, and the yard bridge selects tasks to carry out operations according to the action instructions. The method improves the operation efficiency of stacking and retrieving boxes in the storage yard, and reduces the interference of double yard bridges and the waiting time of vehicles.

Description

technical field [0001] The invention belongs to the technical field of automobiles and transportation, and in particular relates to a dynamic coordinated scheduling method for double-yard bridges in a container yard. Background technique [0002] With the globalization of the economy and the development of international trade, the volume of container freight continues to grow. Container ships are constantly becoming larger. In recent years, many container ships with more than 20,000 TEUs have been put into use. The increase in container throughput and the enlargement of ships require container terminals and yards to have greater throughput capacity and higher operating efficiency. The storage yard is the core operation area of ​​the container terminal and the station, and its main loading and unloading mechanical equipment is the container yard gantry bridge crane (abbreviated as the yard bridge). The loading and unloading turnaround time of ships and vehicles at docks and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/06G06Q10/08G06Q50/30G06N20/00
CPCG06Q10/06312G06Q10/083G06Q50/30G06N20/00
Inventor 周鹏飞张震
Owner DALIAN UNIV OF TECH
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