Naslov
An Overview and Efficiency Analysis of Dominant Frequencies Estimation Methods with the Application of DIRECT Global Minimization Method

Autori
Pisačić, Katarina ; Botak, Zlatko ; Horvat, Marko

Izvornik
Tehnicki vjesnik - Technical Gazette (1330-3651) 27 (2020), 5; 1685-1693

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, ostalo

Ključne riječi
DFT, Discrete Fourier transformation, DIRECT global minimization, dominant frequency, Lipschitz, multi peak detection, spectral analysis, vibration

Sažetak
This report discusses the application of the following methods that are used to calculate maximum frequency of a spectrum: parabolic, modified parabolic by Rife and Vincent, the method according to Quinn from 1994 and the method according to Quinn from 1997. After introducing DIRECT global minimization method, the results obtained using previously mentioned methods are compared with the results obtained using DIRECT global minimization of the Lipschitz function. Determining vibration frequency and comparing to previously collected data or knowledge base data is a common procedure. In engineering practice it is often necessary to determine not one, but several so-called dominant frequencies or local maxima ; the procedure is sometimes called multi peak detection and here we propose an algorithm for computerised multi peak detection.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

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