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

Download the digital copy of the doc pdf document

Authors

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.