On stability analysis of active disturbance rejection control for nonlinear time-varying plants with unknown dynamics

Abstract

This paper concerns with stability characteristics of active disturbance rejection control for nonlinear timevarying plants that are largely unknown. In particular, asymptotic stability is established where the plant dynamics is completely known. In the face of large dynamic uncertainties, estimation and tracking errors are shown to be bounded, with their bounds monotonously decreasing with their respective bandwidths. © 2007 IEEE.