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Title: Implementation of distributed control of hierarchical assembly systems via extended critical places
Authors: Yang, Yan
Hu, Hesuan
Keywords: Engineering::Computer science and engineering
Issue Date: 2019
Source: Yang, Y., & Hu, H. (2019). Implementation of distributed control of hierarchical assembly systems via extended critical places. IEEE Access, 7, 182937-182950. doi:10.1109/ACCESS.2019.2960029
Project: 2014-T1-001-147 
Journal: IEEE Access 
Abstract: Deadlock problem, a research area full of vitality, has been extensively investigated in the framework of Petri nets. Much of the work on deadlock problem mainly focuses on the models with flexible routes, while there are few theoretical results from the models with assembly operations, especially the models with hierarchical assembly operations. In this paper, an innovative distributed control method for assembly systems with complex structures is developed. Before advancing to the next step, a forward search procedure is conducted on the concerned process to check whether there exists a firing sequence from its current place to its nearest global critical place. The movement of its next step is allowed when the search result is positive; otherwise, our method prohibits its one-step movement and the same search method is imposed on the remaining processes until a positive result is returned. During the execution of our control method, because of no demanding of all the states and communication with other unchecked processes, a great reduction of computational complexity can be achieved with our on-line and real-time control strategy.
ISSN: 2169-3536
DOI: 10.1109/ACCESS.2019.2960029
Schools: School of Computer Science and Engineering 
Rights: © 2019 IEEE. This journal is 100% open access, which means that all content is freely available without charge to users or their institutions. All articles accepted after 12 June 2019 are published under a CC BY 4.0 license, and the author retains copyright. Users are allowed to read, download, copy, distribute, print, search, or link to the full texts of the articles, or use them for any other lawful purpose, as long as proper attribution is given.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SCSE Journal Articles

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