EFFECT OF HARMONIC NOISE ON THE ESTIMATION OF THE MEAN VALUE OF A SIGNAL WITH REDUCTION OF ITS SAMPLING FREQUENCY
P. N. Zvyagin1,2
1St. Petersburg State Polytechnical University, ul. Politekhnicheskaya 29, St. Petersburg, 195251 Russia
p_zvyagin@bk.ru
2Krylov State Research Center, Moskovskoe Shosse 44, St. Petersburg, 196158 Russia
Keywords: signal analysis, signal sampling, harmonic signal, ice loads
Abstract
The effect of reduction of the signal sampling frequency by the signal mean value in the case of superposition of a harmonic noise component onto the original steady stochastic signal is studied. Conditions under which reduction of the observation frequency of this process significantly changes the observed mean values are found. In this regard, a number of statements are formulated and proved. The consequences of a reduction of the observation frequency of the dynamometer signal for the experiment performed in an ice basin with a tanker hull model are considered.
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