Supervisor Reconfiguration for Deadlock Prevention by Resources Reallocation
Joint Authors
Wang, Shouguang
Li, Zhiwu
Liu, Miao
Source
Journal of Applied Mathematics
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-04-03
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
Analysis and control of deadlocks play an important role in the design and operation of automated flexible manufacturing systems (FMSs).
In FMS, deadlocks are highly undesirable situations, which always cause unnecessary cost.
The design problem of an optimal supervisor is in general NP-hard.
A computationally efficient method often ends up with a suboptimal one.
This paper develops a deadlock prevention policy based on resources reallocation and supervisor reconfiguration.
First, given a plant model, we reallocate the marking of each resource place to be one, obtaining a net model whose reachable states are much less than that of the original one.
In this case, we find a controlled system for it by using the theory of regions.
Next, the markings of the resource places in the controlled system are restored to their original ones.
Without changing the structure of the obtained controlled system, we compute the markings of the monitors gradually, which can be realized by two algorithms proposed in this paper.
Finally, we decide a marking for each monitor such that it makes the controlled system live with nearly optimal permissive behavior.
Two FMS examples are used to illustrate the application of the proposed method and show its superior efficiency.
American Psychological Association (APA)
Liu, Miao& Wang, Shouguang& Li, Zhiwu. 2013. Supervisor Reconfiguration for Deadlock Prevention by Resources Reallocation. Journal of Applied Mathematics،Vol. 2013, no. 2013, pp.1-11.
https://search.emarefa.net/detail/BIM-462849
Modern Language Association (MLA)
Liu, Miao…[et al.]. Supervisor Reconfiguration for Deadlock Prevention by Resources Reallocation. Journal of Applied Mathematics No. 2013 (2013), pp.1-11.
https://search.emarefa.net/detail/BIM-462849
American Medical Association (AMA)
Liu, Miao& Wang, Shouguang& Li, Zhiwu. Supervisor Reconfiguration for Deadlock Prevention by Resources Reallocation. Journal of Applied Mathematics. 2013. Vol. 2013, no. 2013, pp.1-11.
https://search.emarefa.net/detail/BIM-462849
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-462849