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Recently, several approaches for the study of fuzzy discrete event systems (FDES) in a supervisory control context have been proposed. Although controllability of fuzzy languages and their implementation by a supervisor could be verified by algorithmic procedures, the problem of supervisor synthesis was only solved for the case of FDES with crisp states but fuzzy state transitions. In this paper,...
In order to tackle the controller synthesis problem for large-scale discrete-event systems, recent approaches suggest the design of interacting modular or decentralized supervisors. In these works, information exchange between the supervisors is either required implicitly by the synchronization of shared events or explicitly by the communication of events or symbols. However, it is not discussed how...
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...
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...
The libFAUDES (Friedrich-Alexander University Discrete Event Systems) library is an open source C++ software library for discrete event systems (DES) that is developed at the University of Erlangen-Nuremberg. The core library supports methods for the DES analysis and supervisor synthesis, while a built-in plugin mechanism allows of specialized library extensions. In this paper, we evaluate libFAUDES...
The synthesis of efficient distributed discrete-event controllers that are potentially implemented in networked controller devices has been extensively studied in recent years. However, different from the controller synthesis, the realization of such controllers on a network requires the additional consideration of timing issues due to the communication. To this end, we present a communication model...
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