Stability robustness of linear output feedback systems with both time-varying structured and unstructured uncertainties as well as actuator saturation

Abstract

This paper investigates the stability robustness of linear output feedback systems with actuator saturation as well as both time-varying structured (elemental) and unstructured (norm-bounded) parameter uncertainties by directly considering the mixed quadratically coupled uncertainties in the problem formulation. Based on the Lyapunov approach and some essential properties of matrix measures, a new sufficient condition is proposed for ensuring that the linear output feedback systems with actuator saturation as well as both time-varying structured and unstructured parameter uncertainties are robustly stable. A numerical example is given to illustrate the application of the presented sufficient condition.

Keywords

stability robustness output feedback systems parameter uncertainties actuator saturation

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