Output mini-max control for polynomial systems: analysis and applications

Manuel Jiménez-Lizárraga, Michael V. Basin, Victoria Celeste Rodríguez Carreón and Pablo Cesar Rodríguez Ramírez

International Journal of Systems Science, 2014, vol. 45, issue 9, 1880-1891

Abstract: This paper presents a solution to a robust optimal regulation problem for a nonlinear polynomial system affected by parametric and matched uncertainties, which is based only on partial state information. The parameters describing the dynamics of the nonlinear polynomial plant depend on a vector of unknown parameters, which belongs to a finite parametric set, and the application of a certain control input is associated with the worst or least favourable value of the unknown parameter. A high-order sliding mode state reconstructor is designed for the nonlinear plant in such a way that the previously designed control can be applied for a system with incomplete information. Additionally, the matched uncertainty is also compensated by means of the same output-based regulator. The obtained algorithm is applied to control an uncertain nonlinear inductor circuit of the third order and a mechanical pendulum of the third order, successfully verifying the effectiveness of the developed approach.

Date: 2014
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DOI: 10.1080/00207721.2012.757385

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