Open AccessRobust fault estimation observer design with finite‐time convergence specification
Author(s) -
Zhang Ke,
Jiang Bin,
Cocquempot Vincent
Publication year - 2017
Publication title -
iet control theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.059
H-Index - 108
eISSN - 1751-8652
pISSN - 1751-8644
DOI - 10.1049/iet-cta.2016.0200
Subject(s) - control theory (sociology) , observer (physics) , convergence (economics) , computer science , estimation , fault (geology) , control engineering , engineering , artificial intelligence , control (management) , physics , quantum mechanics , seismology , geology , economics , economic growth , systems engineering
In this study, the problem of fault estimation observer design with finite‐time convergence specification for continuous‐time dynamic systems subject to external disturbances. First, the unknown input observer is constructed to achieve accurate estimation of the occurred fault and to guarantee robustness against the disturbance. Then a pole placement‐based fault estimation observer is constructed using time‐delay design such that the fault estimation error converges to zero in finite time. Unlike conventional literatures, the proposed fault estimator with finite‐time convergence specification does not contain discontinuous sign function. Finally, simulation results of an aircraft application are presented to illustrate the finite‐time convergence of the proposed fault estimation observer.