Identification of Frequency of Biased Harmonic Signal

摘要

We consider a problem of identification of unknown frequency of a biased sinusoidal signal y(t) = σ_o + σsin(ωt＋Φ) + δ(t) with bounded disturbance or harmonic noise δ(t). A new proposed approach to estimation of frequency of biased sinusoidal signal is robust with regard to unaccounted disturbances, which are present in measurement of effective signal. Unlike known analogs, this approach allows to regulate time of estimation of unknown frequency ω. The proposed approach also allows online amplitude and bias estimation. The proposed identification algorithm has smaller dimension than other known analogs.