Disturbance observer based repetitive controller for time-delay systems

Authors:
Jing Na;Ramon Costa-Castelló;Robert Griñó;Xuemei Ren
Affiliations:
Department of Automatic Control, Beijing Institute of Technology, Beijing, P. R. China;Instituto de Organización y Control de Sistemas Industriales, Universitat Politècnica de Catalunya, Barcelona, Spain;Instituto de Organización y Control de Sistemas Industriales, Universitat Politècnica de Catalunya, Barcelona, Spain;Department of Automatic Control, Beijing Institute of Technology, Beijing, P. R. China
Venue:
ETFA'09 Proceedings of the 14th IEEE international conference on Emerging technologies & factory automation
Year:
2009

Citing 6
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Abstract

This paper presents a discrete control design for time-delay systems subjected to the periodical command signal or exogenous disturbances. Unlike other dead-time compensators (DTC), we take profit of the system components to construct an internal model. In addition, a novel disturbance observer is developed to compensate the effect of disturbances, and thus to achieve tracking and disturbance rejection simultaneously. The possible fractional delay from discretization is also handled by using a fractional delay filter. The stability conditions and robustness analysis under model uncertainties are provided. Two numerical examples including a supply chain management (SCM) is provided to illustrate the feasibility of the results.