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arXiv · 2002.10023

Suboptimal Control of Unknown Second-order Nonlinear Systems with Guaranteed Global Convergence

Amir Shakouri·M. Reza Emami
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Abstract

A suboptimal active disturbance rejection controller (S-ADRC) is proposed for second-order systems with unknown time-varying nonlinear dynamics. The output-feedback controller guarantees a global convergence to the vicinity of an optimal solution by means of dynamic control gains, based on the estimated main and extended state variables obtained through a high-gain observer. Three numerical examples compare the performance of the proposed control scheme applied to linear and nonlinear systems with that of a fixed-gain conventional ADRC as well as several model-based optimal and suboptimal controllers.

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Amir Shakouri, M. Reza Emami. 2020-02-24. Suboptimal Control of Unknown Second-order Nonlinear Systems with Guaranteed Global Convergence. https://doi.org/10.1109/lcsys.2022.3184647

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