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Title: Digital redesign of analogue dynamic output-feedback controllers for polytopic systems.
Authors: Morais, Cecilia de Freitas
Braga, Marcio Feliciano
Tognetti, Eduardo Stockler
Oliveira, Ricardo Coração de Leão Fontoura de
Peres, Pedro Luis Dias
Keywords: Sampled-data control
Uncertain systems
Euclidean and H∞ norms
Linear matrix inequalities
Issue Date: 2017
Citation: MORAIS, C. de F. et al. Digital redesign of analogue dynamic output-feedback controllers for polytopic systems. International Journal of Control, v. 92, n. 8, p. 1764-1777, 2017. Disponível em: <>. Acesso em: 10 mar. 2020.
Abstract: This paper is devoted to the problem known as digital redesign, i.e. given a previously designed stabilising continuous-time controller for a continuous-time plant, synthesise a digital controller that provides the hybrid closed-loop system with output trajectories as similar as possible to the continuous-time ones. To accomplish this goal, two distinct optimisation criteria are investigated: (i) the Euclidean norm of the difference between the dynamic matrix of the discretised closed-loop continuous-time system and the dynamic matrix that represents the discretised open-loop system fed back by the designed digital controller; (ii) the H∞ norm of the transfer function from the noise input to the error between the outputs of the two systems. As main novelties with respect to the existing results on digital redesign, the proposed conditions can deal with polytopic systems, and can synthesise reduced-order dynamic output-feedback digital controllers as well.
ISSN: 1366-5820
Appears in Collections:DEELT - Artigos publicados em periódicos

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