Premium
Sensor fault detection and isolation for nonlinear systems based on a sliding mode observer
Author(s) -
Yan XingGang,
Edwards Christopher
Publication year - 2007
Publication title -
international journal of adaptive control and signal processing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.73
H-Index - 66
eISSN - 1099-1115
pISSN - 0890-6327
DOI - 10.1002/acs.967
Subject(s) - fault detection and isolation , control theory (sociology) , observer (physics) , nonlinear system , actuator , fault (geology) , filter (signal processing) , control engineering , engineering , computer science , mode (computer interface) , artificial intelligence , computer vision , control (management) , physics , quantum mechanics , seismology , geology , operating system
In this paper, a sensor fault detection and isolation scheme for nonlinear systems is considered. A nonlinear diffeomorphism is introduced to explore the system structure and a simple filter is presented to ‘transform’ the sensor fault into a pseudo‐actuator fault scenario. A sliding mode observer is designed to reconstruct the sensor fault precisely if the system does not experience any uncertainty, and to estimate the sensor fault when uncertainty exists. The reconstruction and estimation signals are based only on available information and thus can be implemented online. Finally, a mass–spring system is used to illustrate the approach. Copyright © 2007 John Wiley & Sons, Ltd.