Open AccessJournal Article
Observer design for systems with unknown inputs
Stefen Hui,Stanislaw H. Żak +1 more
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In this paper, the state of the observed system is decomposed into known and unknown components, and the unknown component is a projection, not necessarily orthogonal, of the whole state along the subspace in which the available state component resides.Abstract:
Design procedures are proposed for two different classes of observers for systems withunknown inputs In thefirst approach, the state of the observed system is decomposed into known and unknown components The unknown component is a projection, not necessarily orthogonal, of the whole state along the subspace in which the available state component resides Then, a dynamical system to estimate the unknown component is constructed Combining the output of the dynamical system, which estimates the unknown state component, with the available state information results in an observer that estimates the whole state It is shown that some previously proposed observer architectures can be obtained using the projection operator approach presented in this paper The second approach combines sliding modes and the second method of Lyapunov resulting in a nonlinear observer The nonlinear component of the sliding mode observer forces the observation error into the sliding mode along a manifold in the observation error space Design algorithms are given for both types of observersread more
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Brief paper: Sliding-mode observers for systems with unknown inputs: A high-gain approach
TL;DR: The state estimation error of the proposed high-gain approximate differentiator based sliding-mode observer is shown to be uniformly ultimately bounded with respect to a ball whose radius is a function of design parameters.
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Artificial Neural Networks for the Modelling and Fault Diagnosis of Technical Processes
TL;DR: Modelling Issue in Fault Diagnosis, Locally Recurrent Neural Networks, and Stability and Stabilization of Locally recurrent Networks.
Journal ArticleDOI
Doubly Fed Induction Generator Model-Based Sensor Fault Detection and Control Loop Reconfiguration
TL;DR: A voltage-oriented doubly fed induction generator, which is often used in wind turbines, is examined and current, voltage, and position sensor fault detection, isolation, and reconfiguration are presented.
Journal ArticleDOI
High order sliding mode observer for linear systems with unbounded unknown inputs
TL;DR: A global observer is designed for strongly detectable systems with unbounded unknown inputs and a Luenberger observer for the first subsystem is designed, which satisfies the Hautus condition.
References
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The Theory of Matrices
TL;DR: In this article, the Routh-Hurwitz problem of singular pencils of matrices has been studied in the context of systems of linear differential equations with variable coefficients, and its applications to the analysis of complex matrices have been discussed.
Book
Robust Model-Based Fault Diagnosis for Dynamic Systems
Jie Chen,Ron J. Patton +1 more
TL;DR: Robust Model-Based Fault Diagnosis for Dynamic Systems targets both newcomers who want to get into this subject, and experts who are concerned with fundamental issues and are also looking for inspiration for future research.
Book
Sliding mode control : theory and applications
TL;DR: This text provides the reader with a grounding in sliding mode control and is appropriate for the graduate with a basic knowledge of classical control theory and some knowledge of state-space methods.