A Matheuristic for AGV Scheduling with Battery Constraints

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Abstract

This paper considers the problem of scheduling automated guided vehicles (AGVs) with battery constraints. Each transport request involves a soft time window, and the AGV fleet used to service those requests is heterogeneous with a diverse set of capabilities and travel costs. In contrast to the existing literature, each transport request may require different AGV material handling capabilities (such as lift loads, tow loads, or handle loads with a mounted robot arm), and the AGV batteries can be recharged partially under consideration of a critical battery threshold. The problem is to assign the transport and charging requests to AGVs, sequence the requests, and determine their starting times and the recharging durations of the AGVs with the objective of minimizing a weighted sum of the tardiness costs of transport requests and travel costs of AGVs. A mixed-integer linear programming model is formulated. We also propose a new matheuristic that makes use of an adaptive large neighborhood search algorithm and a linear program to solve industry-size instances. We illustrate the efficacy of our approach with an industry case study using real-world data.
Original languageEnglish
Number of pages19
JournalEuropean Journal of Operational Research
Volume297
Issue number1
Early online date14 Aug 2021
DOIs
Publication statusPublished - 14 Aug 2021

Keywords

  • Scheduling
  • Automated guided vehicles
  • Adaptive large neighborhood search
  • Mixed-integer linear programming

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