This paper deals with a novel robust estimation
methodology yielding the amplitudes, frequencies and phases of
the components of a biased multi-sinusoidal signal in presence
of a bounded disturbance on the measurement. The proposed
method is based on a suitable adaptive observer in which the
parameters’ adaptation law is equipped with an excitationbased
switching logic. The stability analysis shows the existence
of a set of tuning parameter guaranteeing that the estimator’s
dynamics is input-to-state stable with respect to bounded
measurement disturbances. The effectiveness of the algorithm
is illustrated by some simulation examples also reporting a few
comparison results.
