Штучний інтелект

Анотація: The analysis of a numerical method of solving DFT spectrum «leakage» effect is given. Practical application of a method is that with its help to become possible an assessment of key parameters of a measured periodic signal (amplitude and frequency) on its DFT spectrum. The method analyzed in article is alternative of the window functions application, but not excluding effect of «leakage» of spectral power. Unlike application of the window functions, the method presented in article allows to restore almost completely true values of amplitude and signal frequency according to a discrete spectrum. In article work of an offered numerical method of elimination of «leakage» effect of spectral power is analyzed at various degree of an initial periodic signal noise. As an example the analyzer of a vibroacoustic signal spectrum of the marine diesel turbocharger, designed on the base of the ATxmega256A3 is taken.

Ключові слова: spectral analysis, leakage effect, marine diesel, turbocharger, diagnosis

Посилання:

1. Varbanets R.A. I.I., 2012. – № 4. – S. 241-252.
2. Otnes Р.М. : Mir, 1982. – 482 S.
3. Varbanets R.A. Vesnik ONMU. – 2006. – № 18 – S. 134-141.
4. RightMark Audio Analyzer. audio.rightmark.org