• DocumentCode
    3138232
  • Title

    An adaptive quasi-notch filter for a biased sinusoidal signal estimation

  • Author

    Fedele, Giuseppe ; Ferrise, Andrea ; Muraca, Pietro

  • Author_Institution
    Dept. of Electron., Comput. & Syst. Sci, Comput. & Syst. Sci. Univ. of Calabria, Rende, Italy
  • fYear
    2011
  • fDate
    19-21 Dec. 2011
  • Firstpage
    1060
  • Lastpage
    1065
  • Abstract
    This note presents an alternative approach to classical adaptive notch filters designed to identify the frequency, magnitude, phase and offset of a biased sinusoidal signal. The algorithm takes advantages of an adaptive law for the resonant frequency of a third-order generalized integrator as a part of an orthogonal-signals generator system. The resulting estimator presents a dynamic order equal to 4. The strength of the discussed strategy results in a fast and accurate signal tracking capability and a good rejection to noise. The properties of the algorithm are verified in simulations in a range of signal conditions, such as step and sweep changes in frequency and voltage sag confirming the effectiveness of the strategy for estimation and tracking of time-varying parameters.
  • Keywords
    adaptive filters; integrating circuits; notch filters; parameter estimation; signal denoising; simulation; tracking; adaptive law; adaptive quasinotch filter; biased sinusoidal signal; orthogonal signal generator system; resonant frequency; signal tracking capability; sinusoidal signal estimation; third-order generalized integrator; time varying parameter estimation; Estimation; Frequency estimation; Gain; Phase locked loops; Resonant frequency; Stability analysis; Voltage fluctuations;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Control and Automation (ICCA), 2011 9th IEEE International Conference on
  • Conference_Location
    Santiago
  • ISSN
    1948-3449
  • Print_ISBN
    978-1-4577-1475-7
  • Type

    conf

  • DOI
    10.1109/ICCA.2011.6137998
  • Filename
    6137998