4.6 Article

Synchronization of Shop-Floor Logistics and Manufacturing Under IIoT and Digital Twin-Enabled Graduation Intelligent Manufacturing System

Journal

IEEE TRANSACTIONS ON CYBERNETICS
Volume 53, Issue 3, Pages 2005-2016

Publisher

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TCYB.2021.3108546

Keywords

Manufacturing; Logistics; Synchronization; Production; Industrial Internet of Things; Real-time systems; Digital twin; Digital twin; graduation intelligent manufacturing system (GiMS); Industrial Internet of Things (IIoT); manufacturing planning and control (MPC); shop-floor logistics and manufacturing synchronization

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This article introduces the concepts and principles of shop-floor logistics and manufacturing synchronization. It proposes an overall framework based on an intelligent manufacturing system and explores synchronization mechanisms using mixed-integer programming and an equivalent constraint programming model. The case study demonstrates the advantages of this approach.
Logistics interfaces with manufacturing throughout the entire production process need synchronous operations. For achieving integrated organization and operations between manufacturing and logistics, this article introduces the concept of shop-floor logistics and manufacturing synchronization with four principles, including: 1) synchronization-oriented manufacturing system; 2) synchronized information sharing; 3) synchronized decision making; and 4) synchronized operations. The marriage of the principles rendered the development of an overall framework of the Industrial Internet of Things (IIoT) and digital twin-enabled graduation intelligent manufacturing system (GiMS). A mixed-integer programming-based synchronization mechanism is proposed under GiMS. To meet the requirement of fast decision making in real-life shop-floor logistics and manufacturing synchronization problems, an equivalent constraint programming model is developed and tested. The observation and analysis of the case company show the advantage of the proposed concept and approach with the best performance regarding key performance indicators. The concept of synchronization provides an insight for understanding the interaction of logistics and manufacturing at the operational level. This article potentially enables manufacturers to reevaluate and develop their manufacturing planning and control strategies in the IIoT and digital twin-based manufacturing environment.

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