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Nonblocking hierarchical control of decentralized des
Date
2005-12-01
Author
Schmidt, Klaus Verner
Moor, Thomas
Metadata
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This work considers a hierarchical control architecture for a class of discrete event systems which can also be applied to decentralized control systems. It is shown that nonblocking supervisory control on the high level of the hierarchy results in nonblocking and hierarchically consistent control on the low level. Copyright © 2005 IFAC.
Subject Keywords
Decentralized systems
,
Discrete event systems
URI
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=79960711677&origin=inward
https://hdl.handle.net/11511/85909
DOI
https://doi.org/10.3182/20050703-6-cz-1902.00312
Conference Name
16th Triennial World Congress of International Federation of Automatic Control, IFAC 2005
Collections
Department of Electrical and Electronics Engineering, Conference / Seminar
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Perk, Sebastian; Moor, Thomas; Schmidt, Klaus Verner (2008-10-08)
In our previous work, a framework for the hierarchical design of discrete event systems has been introduced that is based on a notion of inputs and outputs. I/O-plant models describe the interaction of each subsystem with the operator (or controller) and the environment. By alternation of subsystem composition and controller synthesis, a hierarchy of controllers is obtained that complements a hierarchy of environment models. An admissibility condition was presented that implies liveness while allowing for a...
On maximal permissiveness of hierarchical and modular supervisory control approaches for discrete event systems
Schmidt, Klaus Verner (2008-08-26)
Recently, several efficient modular and hierarchical approaches for the control of discrete event systems (DES) have been proposed. Although these methods are very suitable for dealing with the state space explosion problem, their common limitation is that either maximal permissiveness is not addressed or unnecessarily restrictive conditions are required in order to ensure maximally permissive control. In this paper we develop a unified framework for the investigation of maximal permissiveness of modular co...
Hierarchical multitasking control of discrete event systems: Computation of projections and maximal permissiveness
Schmidt, Klaus Verner; Cury, José E.r. (null; 2010-12-01)
This paper extends previous results on the hierarchical and decentralized control of multitasking discrete event systems (MTDES). Colored observers, a generalization of the observer property, together with local control consistency, allow to derive sufficient conditions for synthesizing modular and hierarchical control that are both strongly nonblocking (SNB) and maximally permissive. A polynomial procedure to verify if a projection fulfills the above properties is proposed and in the case they fail for a g...
Efficient Abstractions for the Supervisory Control of Modular Discrete Event Systems
Schmidt, Klaus Verner (2012-12-01)
The topic of this technical note is the nonblocking and maximally permissive abstraction-based supervisory control for modular discrete event systems (DES). It is shown, that an efficient abstraction technique, that was developed for the nonconflict verification of modular DES, is also suitable for the nonblocking supervisory control. Moreover, it is proved that this abstraction technique can be extended by the condition of local control consistency, in order to achieve maximally permissive supervision. Dif...
Marked-string accepting observers for the hierarchical and decentralized control of discrete event systems
Schmidt, Klaus Verner (2006-12-01)
The paper extends previous work, where we develop a control theory for nonblocking hierarchical control of decentralized discrete event systems (DES). The results are based on two technical conditions for the hierarchical abstraction: it has to be (i) locally nonblocking and (ii) marked string accepting. In this paper, we investigate the systematic construction of the hierarchical abstraction. Starting from an initial natural projection which need not fulfill (i) and (ii), we provide an algorithm to compute...
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K. V. Schmidt and T. Moor, “Nonblocking hierarchical control of decentralized des,” Prague, Çek Cumhuriyeti, 2005, vol. 16, p. 163, Accessed: 00, 2021. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=79960711677&origin=inward.