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Ng, Kok Yew; Tan, Chee Pin; Edwards, Christopher; Kuang, Ye Chow

New results in robust actuator fault reconstruction for linear uncertain systems using sliding mode observers. (English) Zbl 1127.93313

Int. J. Robust Nonlinear Control 17, No. 14, 1294-1319 (2007).
Summary: This paper presents a robust actuator fault reconstruction scheme for linear uncertain systems using sliding mode observers. In existing work, fault reconstruction via sliding mode observers is limited to either linear certain systems subject to unknown inputs, relative degree one systems or a specific class of relative degree two systems. This paper presents a new method that is applicable to a wider class of systems with relative degree higher than one, and can also be used for systems with more unknown inputs than outputs. The method uses two sliding mode observers in cascade. Signals from the first observer are processed and used to drive the second observer. Overall, this results in actuator fault reconstruction being feasible for a wider class of systems than using existing methods. A simulation example verifies the claims made in this paper.

Cited in 11 Documents

MSC:

93B07 Observability
93C05 Linear systems in control theory
93C41 Control/observation systems with incomplete information
93C15 Control/observation systems governed by ordinary differential equations
93B35 Sensitivity (robustness)

Keywords:

robustness; fault reconstruction; sliding mode observer

Software:

LMI toolbox
PDF BibTeX XML Cite
\textit{K. Y. Ng} et al., Int. J. Robust Nonlinear Control 17, No. 14, 1294--1319 (2007; Zbl 1127.93313)
Full Text: DOI Link

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