Fast extremum-seeking for Wiener-Hammerstein plants

WH Moase; C Manzie

Journal article

Fast extremum-seeking for Wiener-Hammerstein plants

WH Moase, C Manzie

Automatica | PERGAMON-ELSEVIER SCIENCE LTD | Published : 2012

DOI: 10.1016/j.automatica.2012.06.071

Abstract

This paper considers an observer-based extremum-seeking (ES) scheme acting on a WienerHammerstein (WH) plant. The ES scheme utilises a high-frequency sinusoidal dither in order to achieve fast minimisation of the plant's static nonlinearity. Unlike the prevailing analyses of "fast" ES schemes acting on WH plants, the presented result is semi-global and applicable to plants with fairly general, unknown nonlinearities. Design of the ES scheme requires knowledge of the relative orders of both the input and output dynamics of the plant. Two different tunings of the ES parameters are considered: one which forces the ES dynamics to be fast, and one which is less restrictive. It is shown that appro..

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University of Melbourne Researchers

Chris Manzie Author

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Funding Acknowledgements

This research was supported under Australian Research Council's Discovery Projects funding scheme (project number DP0984577). The material in this paper was partially presented at the 18th IFAC World Congress, August 28-September 2, 2011, Milan, Italy. This paper was recommended for publication in revised form by Associate Editor Raul Ordonez under the direction of Editor Miroslav Krstic.