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  4. Optimal transient multiple hoist scheduling for processes with loops
 
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Optimal transient multiple hoist scheduling for processes with loops

Publikationstyp
Conference Paper
Date Issued
2011-01
Sprache
English
Author(s)
Steneberg, Steffen C.  
Institut
Automatisierungstechnik E-1(H)  
TORE-URI
http://hdl.handle.net/11420/12165
Start Page
318
End Page
323
Article Number
6144902
Citation
ICARA 2011 - Proceedings of the 5th International Conference on Automation, Robotics and Applications : Wellington, New Zealand, 6 - 8 December 2011. - Piscataway, NJ, 2011. - (): art. no. 6144902 = pp. 318-323 (2011)
Contribution to Conference
5th International Conference on Automation, Robotics and Applications, ICARA 2011  
Publisher DOI
10.1109/ICARA.2011.6144902
Scopus ID
2-s2.0-84857408020
Publisher
IEEE
This paper addresses the transient multi-hoist scheduling problem in flexible manufacturing facilities and focuses on Lot Switching. The problem arises in electroplating lines with multiple hoists operating on shared tracks. Due to a flexible production different products need to be manufactured which differ in the routing and processing times. The considered two optimal cycles have to be combined and each may contain loops, i.e. multiple usages of single machines. In addition the electroplating line may be equipped with parallel resources. A mixed integer linear programming (MILP) model for optimizing the transient schedule is presented considering collisions of hoists. This paper offers a new formulation for the collision avoidance by introducing spacial relations for the movement and improving the handling with loops and parallel resources. The fixed allocation of the hoists to the transports of the consecutive cyclic schedules is suspended for the transient schedule resulting in an optimal solution.
Subjects
collision avoidance
Lot Switching
Mixed Integer Linear Programming
spacial relations
Transient Multiple Hoist Scheduling
DDC Class
600: Technik
620: Ingenieurwissenschaften
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