Robust aperiodic-disturbance rejection in an uncertain modified repetitive-control system

Zhou, L. ; She, J. ; Li, C. ; Pan, C.

International Journal of Applied Mathematics and Computer Science, Tome 26 (2016) no. 2, pp. 285-295.

Résumé

This paper concerns the problem of designing an EID-based robust output-feedback modified repetitive-control system (ROFMRCS) that provides satisfactory aperiodic-disturbance rejection performance for a class of plants with time-varying structured uncertainties. An equivalent-input-disturbance (EID) estimator is added to the ROFMRCS that estimates the influences of all types of disturbances and compensates them. A continuous-discrete two-dimensional model is built to describe the EID-based ROFMRCS that accurately presents the features of repetitive control, thereby enabling the control and learning actions to be preferentially adjusted. A robust stability condition for the closed-loop system is given in terms of a linear matrix inequality. It yields the parameters of the repetitive controller, the output-feedback controller, and the EID-estimator. Finally, a numerical example demonstrates the validity of the method.

Détail

Keywords: repetitive control, equivalent input disturbance, two dimensional system, singular value decomposition, linear matrix inequality
Mots-clés : sterowanie powtarzalne, układ dwuwymiarowy, rozkład na wartości szczególne, liniowa nierówność macierzowa

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