Mathematical and Statistical Aspects of Estimating Small Oscillations Parameters in a Conservative Mechanical System Using Inaccurate Observations

Gurami Tsitsiashvili (), Alexey Gudimenko and Marina Osipova
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Gurami Tsitsiashvili: Institute for Applied Mathematics, Far Eastern Branch of Russian Academy of Sciences, Radio Str. 7, 690041 Vladivostok, Russia
Alexey Gudimenko: Institute for Applied Mathematics, Far Eastern Branch of Russian Academy of Sciences, Radio Str. 7, 690041 Vladivostok, Russia
Marina Osipova: Institute for Applied Mathematics, Far Eastern Branch of Russian Academy of Sciences, Radio Str. 7, 690041 Vladivostok, Russia

Mathematics, 2023, vol. 11, issue 12, 1-11

Abstract: This paper selects a set of reference points in the form of an arithmetic progression for planning an experiment to evaluate the parameters of systems of differential equations. This choice makes it possible to construct estimates of the parameters of a system of first-order differential equations based on the reversibility of the observation matrix, as well as estimates of the parameters of a system of second-order differential equations describing vibrations in a mechanical system by switching to a system of first-order differential equations. In turn, the reversibility of the observation matrix used in parameter estimation is established using the Vandermonde formula. A volumetric computational experiment has been carried out showing how, with an increase in the number of observations in the vicinity of reference points and with a decrease in the step of arithmetic progression, the accuracy of estimates of the parameters of the analyzed system increases. Among the estimated parameters, the most important are the oscillation frequencies of a conservative mechanical system, which establish its proximity to resonance, and therefore, determine the stability and reliability of the system.

Keywords: reference points; experiment planning; Vandermonde determinant; matrix exponents; diagonal matrices (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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