Multi-sinusoidal disturbance rejection for discrete-time uncertain stable systems

• Autores: Patrizio Tomei
• Localización: Automatica: A journal of IFAC the International Federation of Automatic Control, ISSN 0005-1098, Vol. 79, 2017, págs. 144-151
• Idioma: inglés
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• Resumen

  • Abstract Linear single-input single-output discrete-time systems P ( z ) with unknown parameters, order and relative degree are considered, which are perturbed by biased sinusoidal disturbances. Under the assumption that the disturbance frequencies, the sign of the static gain P ( 1 ) , the sign of either Re [ P ( e j ω i ) ] or Im [ P ( e j ω i ) ] , for any disturbance frequency ω i , are known, linear disturbance compensators are proposed which achieve exponential disturbance suppression. Such results are then locally extended to the case of disturbances with unknown frequencies.