Collision-Free Route Planning for Multiple AGVs in an Automated Warehouse Based on Collision Classification

Zhang, Zheng; Guo, Qing; Chen, Juan; Yuan, Pingzhi

doi:10.1109/access.2018.2819199

Cited by 100 publications

(52 citation statements)

References 18 publications

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“…The type of collision-free routes can be classified into four types [25] with three suggested solutions, namely (a): Schedule each AGV; (b): Select the desired route; and (c) AGV goes according to its purpose. Each collision classification is followed by one or two cases.…”

Section: Methodsmentioning

confidence: 99%

Conflict-free dynamic route multi-AGV using dijkstra floyd-warshall hybrid algorithm with time windows

Solichudin

Triwiyatno

Riyadi

2020

IJECE

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Autonomous Guided Vehicle is a mobile robot that can move autonomously on a route or lane in an indoor or outdoor environment while performing a series of tasks. Determination of the shortest route on an autonomous guided vehicle is one of the optimization problems in handling conflict-free routes that have an influence on the distribution of goods in the manufacturing industry's warehouse. Pickup and delivery processes in the distribution on AGV goods such as scheduling, shipping, and determining the route of vehicle with short mileage characteristics, is very possible to do simulations with three AGV units. There is a windows time limit on workstations that limits shipping. The problem of determining the route in this study is considered necessary as a multi-vehicle route problem with a time window. This study aims to describe the combination of algorithms written based on dynamic programming to overcome the problem of conflict-free AGV routes using time windows. The combined approach of the Dijkstra and Floyd-Warshall algorithm results in the optimization of the closest distance in overcoming conflict-free routes.

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Section: Methodsmentioning

confidence: 99%

Conflict-free dynamic route multi-AGV using dijkstra floyd-warshall hybrid algorithm with time windows

Solichudin

Triwiyatno

Riyadi

2020

IJECE

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“…k 12 (β) 1. Under this condition, there is 1-[k 12 (β)] 2 ≈ 1 in (15). In addition, ignoring the second-order small quantity, the coupled mode equation of the system is finally obtained…”

Section: Modeling and Analysis Of System A Coupled-mode Modelingmentioning

confidence: 99%

Omnidirectional and Efficient Wireless Power Transfer System for Logistic Robots

Zheng

Zhang

2020

IEEE Access

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The WPT system for logistic robots has the problems of large fluctuation of charging power and low efficiency due to the change of its position. Based on the principle of parity time symmetry, an omnidirectional and efficient wireless power transfer system for logistic robots is proposed. Firstly, the coupling coefficient of two planar spiral coils in different relative positions in space are studied. Then, a time-varying coupled-mode model of the WPT system based on the offset angle of the receiver coil is established, and its working principle and characteristics are analyzed. As long as the coupling coefficient satisfies certain conditions, the output power and efficiency of the system are always keeping constant. Finally, the proposed model is experimentally verified. The measured results show that the WPT system proposed can realize stable 150W power transfer with constant transmitting efficiency of more than 90% for a logistic robot within a confined three-dimensional space around the charging station, which are provided to further verify the correctness of theoretical analysis. INDEX TERMS Wireless power transfer, omnidirectional, parity time symmetry, coupled-mode theory, logistic robots.

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“…Besides, operational cost is also investigated by researchers [21]. Reference [22] proposes a collision free path planning algorithm, to generate feasible paths for mobile robots. In [8], a nested semi-open queueing network (SOQN) is developed to evaluate performance of different battery recovery strategies, and a decomposition method is presented to solve the SOQN models.…”

Section: Literature Reviewmentioning

confidence: 99%

A Comprehensive Framework for the Design of Modular Robotic Mobile Fulfillment Systems

Wang

Zheng

et al. 2020

IEEE Access

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This paper focuses on the design of modular Robotic Mobile Fulfillment Systems. A Robotic Mobile Fulfillment System is an automated storage and retrieval system, in which mobile robots are deployed to deliver storage shelves for picking operation. This paper proposes a modular robotic system with aisle-captive robots for small and medium-sized logistics warehouses. Then analytical models, including a bottleneck-based model and an open queueing network model, are developed to estimate system throughput and average order flow time. Last, a two-stage design framework is proposed to rapidly identify an optimal system configuration. The main contributions are that: first, the proposed modular robotic system is free of traffic congestion and blocking; second, the comprehensive framework highlights some significant guidelines for warehouse developers during the ''conceptualization'' phase of system development. Simulation experiments indicate that the open queueing network model can provide accurate system performance estimation. The effectiveness of the proposed design framework is validated through practical application in real cases. INDEX TERMS Robotic mobile fulfillment system, material handling, open queueing network, logistics warehouses.

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Collision-Free Route Planning for Multiple AGVs in an Automated Warehouse Based on Collision Classification

Cited by 100 publications

References 18 publications

Conflict-free dynamic route multi-AGV using dijkstra floyd-warshall hybrid algorithm with time windows

Conflict-free dynamic route multi-AGV using dijkstra floyd-warshall hybrid algorithm with time windows

Omnidirectional and Efficient Wireless Power Transfer System for Logistic Robots

A Comprehensive Framework for the Design of Modular Robotic Mobile Fulfillment Systems

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