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Paper Abstract and Keywords
Presentation 2018-06-08 15:15
AGVs Dsipatch Timing Control for Self-synchronized Production in a Cellular Manufacturing System
Takehiro Itou (NEC), Keiji Konishi (Osaka Prefecture University), Hisaya Wakayama, Kumiko Tadano, Yoshiharu Maeno (NEC) NLP2018-38 CCS2018-11
Abstract (in Japanese) (See Japanese page) 
(in English) In cellular manufacturing factories composed of many processes, synchronized production is desirable in order to keep high production efficiency. However, it is difficult to keep these processes in synchronization because various disturbances are increasing due to diversification of consumer needs and complication of production processes. Therefore, a synchronization scheme which is robust against such disturbances, is required. In our previous study, we proposed a control law to synchronize automated guided vehicle (AGV) dispatch timing inspired by coupled oscillators. We modeled buffer dynamics of workstations and dispatch timing of AGVs in a cellular manufacturing factory as dynamics of oscillators. The control law modulates thresholds of the buffers to synchronize the dispatch timing for two oscillators system. We also showed that phase dynamics of our system corresponds to the dynamics of the well-known Kuramoto-model. In this study, we extend the control law for the arbitrary number of oscillators and analyze its dynamics. In addition, these analytical results are verified on some numerical simulations.
Keyword (in Japanese) (See Japanese page) 
(in English) AGV / Automated guided vehicles / Cellular manufacturing system / Nonlinear oscillators / Coupled oscillators / Phase synchronization / Relaxation oscillators /  
Reference Info. IEICE Tech. Rep., vol. 118, no. 75, NLP2018-38, pp. 57-62, June 2018.
Paper # NLP2018-38 
Date of Issue 2018-06-01 (NLP, CCS) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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Conference Information
Committee NLP CCS  
Conference Date 2018-06-08 - 2018-06-10 
Place (in Japanese) (See Japanese page) 
Place (in English) Kyoto Terrsa 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Synchronization, Networks, etc 
Paper Information
Registration To NLP 
Conference Code 2018-06-NLP-CCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) AGVs Dsipatch Timing Control for Self-synchronized Production in a Cellular Manufacturing System 
Sub Title (in English)  
Keyword(1) AGV  
Keyword(2) Automated guided vehicles  
Keyword(3) Cellular manufacturing system  
Keyword(4) Nonlinear oscillators  
Keyword(5) Coupled oscillators  
Keyword(6) Phase synchronization  
Keyword(7) Relaxation oscillators  
Keyword(8)  
1st Author's Name Takehiro Itou  
1st Author's Affiliation NEC Corporation (NEC)
2nd Author's Name Keiji Konishi  
2nd Author's Affiliation Osaka Prefecture University (Osaka Prefecture University)
3rd Author's Name Hisaya Wakayama  
3rd Author's Affiliation NEC Corporation (NEC)
4th Author's Name Kumiko Tadano  
4th Author's Affiliation NEC Corporation (NEC)
5th Author's Name Yoshiharu Maeno  
5th Author's Affiliation NEC Corporation (NEC)
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Speaker Author-3 
Date Time 2018-06-08 15:15:00 
Presentation Time 25 minutes 
Registration for NLP 
Paper # NLP2018-38, CCS2018-11 
Volume (vol) vol.118 
Number (no) no.75(NLP), no.76(CCS) 
Page pp.57-62 
#Pages
Date of Issue 2018-06-01 (NLP, CCS) 


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