Journal article

Discrete-time extremum-seeking for Wiener-Hammerstein plants

Rohan C Shekhar, William H Moase, Chris Manzie

Automatica | PERGAMON-ELSEVIER SCIENCE LTD | Published : 2014


This paper presents a new formulation of extremum-seeking control for discrete-time Wiener-Hammerstein plants. A novel method of analysis using Linear Parameter-Varying (LPV) system theory demonstrates semi-global stability of the control scheme. Assuming only limited plant knowledge, the stability result ensures convergence of the plant output in steady state to a point in an arbitrarily small neighbourhood of the extremum, for appropriately chosen controller parameters. The behaviour of the control scheme is analysed on a simple simulated system, prior to being implemented on an internal combustion engine. Experiments demonstrate how the scheme is able to maximise engine output torque in t..

View full abstract


Awarded by Australian Research Council's Discovery Projects funding scheme

Funding Acknowledgements

This work was supported under the Australian Research Council's Discovery Projects funding scheme (Project DP120101830). The material in this paper was not presented at any conference. This paper was recommended for publication in revised form by Associate Editor Raul Ordonez under the direction of Editor Miroslav Krstic.