Event‐triggered tracking control for a family of non‐linear systems via output feedback.

This study considers the event‐triggered tracking control problem for a family of non‐linear systems via output feedback. The uncertainty in the parameters is a significant feature, and the growth condition of the non‐linear terms is related to an output polynomial function. An observer based on the given tracking signal is constructed, and a dynamic equation is established by the high‐gain scaling method. In order to reasonably process the measurement error, an intermediate controller in the form of the hyperbolic tangent function is designed. Based on the relative threshold strategy, an event‐triggered controller is naturally given such that all the closed‐loop signals are globally bounded and the Zeno‐behaviour is favourably avoided. Furthermore, by analysing the constructed dynamic equation, the tracking error converges to a prescribed small residual set. The theoretical results are verified by two numerical examples. [ABSTRACT FROM AUTHOR]