Please use this identifier to cite or link to this item:https://hdl.handle.net/20.500.12259/39227
Type of publication: research article
Type of publication (PDB): Straipsnis kitose duomenų bazėse / Article in other databases (S4)
Field of Science: Matavimų inžinerija / Measurement engineering (T010)
Author(s): Demčenko, Andriejus
Title: Propagation of Uncertainty for Ultrasonic Guided Wave’s Phase Velocity Measured in a Layered Composite Material
Other Title: A0 Lembo bangos modos fazinio greičio matavimo ultragarsine matavimo technika per oro tarpą kompozicinėje medžiagoje GALRE3-3/2 neapibrėžties tyrimas: amplitudinis matavimo metodas
Is part of: Matavimai = Measurements. Kaunas : Technologija, 2008, Nr. 2(42)
Extent: p. 9-14
Date: 2008
Keywords: Fizinis greitis;Nukreiptoji banga;Kompozicinė medžiaga;Neapibrėžtis;Phase velocity;Guided wave;Composite material;Uncertainty
Abstract: Darbe pasiūlyta metodika, leidžianti pagal pasyvaus eksperimento metu gautus riboto kiekio akustinių matavimų duomenis, naudojant regresinės analizės metodologiją ir Fišerio adekvatumo kriterijų, sukonstruoti adekvatų akustinio lauko garso slėgio horizontalaus pjūvio matematinį modelį
In the work a possible procedure is presented for interpretation of ultrasonic guided wave’s phase velocity measurement results in a layered composite structure when the velocity is determined from optimal wave’s transduction angle. The analysis considers two different cases for the interpretation of the experimental results when the data is approximated by a polynomial. The first one, conservative, presents the optimal angle estimation from the polynomial using zero-crossing procedure. The second case considers direct estimation of the optimal angle from polynomial coefficients and analysis of uncertainties in coefficients of the polynomial. The analysis of the uncertainties in coefficients is based on singular value decomposition of the measurement data
Internet: http://www.ktu.lt/lt/mokslas/zurnalai/matavimai/t2008_2a.asp#A._Demčenko
Affiliation(s): Vytauto Didžiojo universitetas
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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