Open AccessInterval estimation of actuator fault by interval analysis
Author(s) -
Zhang Wenhan,
Wang Zhenhua,
Shen Yi,
Guo Shenghui,
Zhu Fanglai
Publication year - 2019
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.2018.6048
Subject(s) - control theory (sociology) , actuator , interval (graph theory) , observer (physics) , interval estimation , fault (geology) , noise (video) , interval arithmetic , computer science , bounded function , mathematics , control (management) , artificial intelligence , confidence interval , statistics , mathematical analysis , physics , combinatorics , quantum mechanics , seismology , image (mathematics) , geology
This study proposes an interval estimation method of actuator fault for linear discrete‐time system. An augmented descriptor system, which is equivalent to the original system, is formulated by letting the actuator fault term be an auxiliary state. Then, an H ∞fault estimation observer is constructed to attenuate the effect of unknown but bounded disturbances and measurement noise. By using interval analysis technique, the interval estimation of actuator fault can be obtained. Finally, a DC servo‐motor example is given to show the effectiveness and superiority of the proposed method.