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A novel event‐triggered extended state observer for networked control systems subjected to external disturbances
Author(s) -
Yu Yang,
Yuan Yuan,
Yang Hongjiu,
Liu Huaping
Publication year - 2019
Publication title -
international journal of robust and nonlinear control
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.361
H-Index - 106
eISSN - 1099-1239
pISSN - 1049-8923
DOI - 10.1002/rnc.4476
Subject(s) - control theory (sociology) , state observer , bounded function , observer (physics) , nonlinear system , computer science , state (computer science) , transmission (telecommunications) , control (management) , mathematics , algorithm , artificial intelligence , physics , mathematical analysis , telecommunications , quantum mechanics
Summary In this paper, the event‐triggered‐based state estimation problem is investigated for a class of nonlinear networked control systems subjected to external disturbances. A novel event‐triggered extended state observer (ESO) is utilized to estimate the so‐called total disturbance, and an output predictor is adopted for the proposed ESO between two consecutive transmission instants. It is also worth pointing out that, in the newly proposed ESO, an event‐triggered mechanism is adopted to update the measurement signal so as to save the communication resource. The sufficient conditions are provided such that the estimation error dynamics is exponentially ultimately bounded. Furthermore, it is proven that the Zeno behavior does not exist for the event‐triggering rules. A number of numerical simulations are conducted to verify the validity of the theoretical results.