Decentralized predictability of discrete event systems
Fuchun Liu · 2017
In this paper, the decentralized predictability of discrete event systems (DESs) is investigated. The notion of copredictability of DESs is formalized under the decentralized framework to capture the feature of copredictable DESs that the occurrences of failure events can be predicted in advance based on at least one local observation. The relationships with the notions of predictability and codiagnosability of DESs are analyzed. It is deducted that copredictability is weaker than predictability but stronger than codiagnosability. In order to achieve the performance of the prediction, the copredictor is constructed from a given decentralized system, in which a family of local prediction components are employed to deal with the local observations. In particular, a necessary and sufficient condition for the copredictability of DESs is presented, which generalizes the main results of predictability of DESs from the centralized framework to the decentralized case.