Journal
ANNALS OF OPERATIONS RESEARCH
Volume 298, Issue 1-2, Pages 339-359Publisher
SPRINGER
DOI: 10.1007/s10479-018-3098-2
Keywords
Robot scheduling; Flexible flow shop; Assembly operation; 3D printer
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The paper proposes an efficient robot task sequence for a flexible assembly system to minimize cycle time and produce multiple types of products simultaneously.
This paper proposes and analyzes an efficient robot task sequence for a flexible assembly system that consists of multiple 3D printers, post-processing, assembly, inspection machines, and a material handling robot. The flexible assembly system, which has been built in many large cities in Korea, has been designed to fabricate customized products for start-ups or individuals. We consider cyclic scheduling of the system in which the robot repeats a certain sequence to produce identical products. We propose a robot task sequence to minimize the cycle time. The system behavior with the proposed robot task sequence is modeled with a timed event graph (TEG), and the optimality of the sequence is proved by analyzing the circuits in the TEG. The results are extended for producing multiple types of products simultaneously.
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