Morais, Cecilia de FreitasBraga, Marcio FelicianoTognetti, Eduardo StocklerOliveira, Ricardo Coração de Leão Fontoura dePeres, Pedro Luis Dias2020-10-302020-10-302017MORAIS, 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: <https://www.tandfonline.com/doi/abs/10.1080/00207179.2017.1410574>. Acesso em: 10 mar. 2020.1366-5820http://www.repositorio.ufop.br/handle/123456789/12903This 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.en-USrestritoSampled-data controlUncertain systemsEuclidean and H∞ normsLinear matrix inequalitiesArtigo publicado em periodicohttps://www.tandfonline.com/doi/full/10.1080/00207179.2017.1410574https://doi.org/10.1080/00207179.2017.1410574