Publication
A robust H∞ observer design for unknown input nonlinear systems: Application to fault diagnosis of a wind turbine
Conference Article
Conference
Mediterranean Conference on Control and Automation (MED)
Edition
23rd
Pages
162-167
Doc link
http://dx.doi.org/10.1109/MED.2015.7158745
File
Authors
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Witczakc, Marcin
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Puig Cayuela, Vicenç
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Rotondo, Damiano
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de Rozprza Faygel, Michal
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Mrugalski, Marcin
Abstract
The paper is devoted to the problem of designing robust unknown input observer (UIO) for fault estimation purpose. The proposed approach is based on the Takagi-Sugeno models which can be effectively applied for modelling of the wide class of non-linear systems. It also revisits the recent results proposed in the literature and provides a less restrictive design procedure of a robust UIO. In particular, the general UIO strategy and the ∞ framework are provided to design a robust fault estimation methodology. The resulting design procedure guarantees that a prescribed disturbance attenuation level is achieved with respect to the state estimation error. The main advantage of the proposed approach boils down to its simplicity because it reduces to solving a set of Linear Matrix Inequalities (LMIs). The final part of the paper presents an illustrative example devoted to the fault estimation of a three blade 1 MW variable-speed, variable-pitch wind turbine
Categories
control theory.
Scientific reference
M. Witczakc, V. Puig, D. Rotondo, M. de Rozprza and M.. Mrugalski. A robust H∞ observer design for unknown input nonlinear systems: Application to fault diagnosis of a wind turbine, 23rd Mediterranean Conference on Control and Automation, 2015, Torremolinos, pp. 162-167.
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