Reguladores basados en observadores de perturbaciones: principios de funcionamiento y métodos de diseño

Abstract

During the past decades, the scientific interest on the linear disturbance observer-based controllers has notably increased, mainly, due to their good properties for handling changes or uncertainties in the systems. In this tutorial, these type of controllers are reviewed by analyzing their characteristic elements -which are: i) the disturbed models, ii) the disturbance observer algorithms, and iii) the feedback control-laws- as well as their main design-techniques. Some aspects of the control theory that motivate and support the use of these regulators are also described, including: the model uncertainties, its relevance within the robust control paradigm, and the capability of the disturbed models to handle uncertainties. The tutorial concludes with an ilustrative example on the closed-loop glucose control for diabetic people (artificial pancreas).