Identification of multi-sinusoidal signals with direct frequency estimation: An adaptive observer approach

• Autores: Gilberto Pin-, Yang Wang, Boli Chen, Thomas Parisini
• Localización: Automatica: A journal of IFAC the International Federation of Automatic Control, ISSN 0005-1098, Nº. 99, 2019, págs. 338-345
• Idioma: inglés
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• Resumen

  • This paper addresses the problem of estimating the frequencies, amplitudes and phases of the n sinusoidal components of a possibly biased multi-sinusoidal signal. The proposed adaptive observer allows the direct adaptation of the frequency estimates with a relatively low dynamic order 3n+1 (3n for an unbiased signal). The stability analysis proves the global exponential convergence of the estimation error and the robustness to additive norm-bounded measurement perturbations.