Freidovich and Khalil have shown that a nonlinear system having relative degree $n$ can be controlled, by means of an extended high-gain observer, so as to recover-up to any arbitrarily fixed degree of accuracy-the performance that would have been obtained by means of the classical feedback-linearization design. This observer involves a gain parameter that grows up to power $n+1$. In this letter we show that the same result can be obtained by means of a controller employing an extension of the 'low power' high-gain observer of Astolfi and Marconi, in which the gain parameter grows up only to power 2.

Achieving Almost Feedback-Linearization via Low-Power Extended Observer / Wu, Y.; Isidori, A.; Marconi, L.. - In: IEEE CONTROL SYSTEMS LETTERS. - ISSN 2475-1456. - 4:4(2020), pp. 1030-1035. [10.1109/LCSYS.2020.2997813]

Achieving Almost Feedback-Linearization via Low-Power Extended Observer

Isidori A.
;
2020

Abstract

Freidovich and Khalil have shown that a nonlinear system having relative degree $n$ can be controlled, by means of an extended high-gain observer, so as to recover-up to any arbitrarily fixed degree of accuracy-the performance that would have been obtained by means of the classical feedback-linearization design. This observer involves a gain parameter that grows up to power $n+1$. In this letter we show that the same result can be obtained by means of a controller employing an extension of the 'low power' high-gain observer of Astolfi and Marconi, in which the gain parameter grows up only to power 2.
2020
extended observer; Feedback-linearization; low-power observer; performance recovery
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Achieving Almost Feedback-Linearization via Low-Power Extended Observer / Wu, Y.; Isidori, A.; Marconi, L.. - In: IEEE CONTROL SYSTEMS LETTERS. - ISSN 2475-1456. - 4:4(2020), pp. 1030-1035. [10.1109/LCSYS.2020.2997813]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1486390
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