Output Tracking and Observation in Nonminimum Phase Systems via Classical and Higher Order Sliding Modes

Abstract

AbstractThe problem of causal output tracking and observation in non-minimum phase nonlinear systems is studied. The extended method of Stable System Center (ESSC) is used in two-fold manner: i) to generate reference profile for unstable internal states; ii) to estimate states of unstable internal dynamics. Two applications of the proposed technique are considered for illustration purposes: output voltage tracking in a nonminimum phase DC/DC electric power converter and output tracking in SISO systems with time-delayed output feedback. A variety of traditional and higher-order sliding mode (HOSM) control and observation methods is employed in the majority of algorithms. Most of the theoretical results are covered by numerical simulations.KeywordsSliding ModeState TrackingOutput TrackingOutput ReferenceNonminimum PhaseThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.