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- W2133287039 abstract "Knowledge of the current system state is crucial to many discrete event systems (DESs) applications such as control, diagnosis and prognosis. Due to limited sensing capabilities, the current state information is generally not available and needs to be estimated. In this paper, we propose a novel distributed state estimation algorithm for discrete event plants. According to the proposed algorithm, local sites maintain and update local state estimates based on their local observations of the plant behavior and the observations of the plant behavior sent from the other sites over communication channels with delays. For efficiency of storage, redundant history information about the possible plant evolution is truncated each time a local state estimate is updated. At each local site, the truncation is performed independently requiring no synchronization among the sites. The state estimate maintained at each of the local sites is shown to remain finite regardless of whether the system can execute an unbounded sequence of unobservable events. It is also shown that the proposed algorithm is sound and complete, i.e., each local estimate always contains the true current states (soundness), and it only contains the reachable states of the traces which give rise to a same history of observations (as received from the plant and the other local sites) as does the one executed by the plant (completeness). Also the proposed algorithm can support an architecture in which there is no communication from a certain site to certain other sites. An illustrative example is provided to demonstrate the proposed distributed state estimation algorithm." @default.
- W2133287039 created "2016-06-24" @default.
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- W2133287039 date "2009-01-01" @default.
- W2133287039 modified "2023-09-27" @default.
- W2133287039 title "Distributed state estimation in discrete event systems" @default.
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- W2133287039 doi "https://doi.org/10.1109/acc.2009.5160029" @default.
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