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New predictive scheme for the control of LTI systems with input delay and unknown disturbances

Abstract : A new predictive scheme is proposed for the control of Linear Time Invariant (LTI) systems with a constant and known delay in the input and unknown disturbances. It has been achieved to include disturbances effect in the prediction even though there are completely unknown. The Artstein reduction is thenrevisited thanks to the computation of this new prediction. An extensive comparison with the standard scheme is presented throughout the article. It is proved that the new scheme leads to feedback controllers that are able to reject perfectly constant disturbances. For time-varying ones, a better attenuation is achieved for a wide range of perturbations and for both linear and nonlinear controllers. A criterion is given to characterize this class of perturbations. Finally, some simulations illustrate the results.
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Submitted on : Tuesday, January 26, 2016 - 4:05:44 PM
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Vincent Léchappé, Emmanuel Moulay, Franck Plestan, Alain Glumineau, Abdelhamid Chriette. New predictive scheme for the control of LTI systems with input delay and unknown disturbances. Automatica, Elsevier, 2015, 52, pp.179-184. ⟨10.1016/j.automatica.2014.11.003⟩. ⟨hal-01093925⟩



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