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2006 | 13 | 4 |
Tytuł artykułu

Processing methods of measured runs of torque and angular speed of combustion engine propulsion system

Autorzy
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
In this paper four processing methods of cyclic data runs, namely : Fourier interpolation and transformation, least-squaresapproximation by means of trigonometric polynomials , synchronous averaging and movable approximation , were presented by using, as an example, discretely measured runs of torque and angular speed. It was demonstrated that for extrac-ting a useful signal out of disturbance background and decomposing the disturbances the appropriate methods are the synchronous averaging and multiple movable approximation. To emerge significant spectral lines from a spectrum the least-squares approximation byusing trigonometric polynomials can be applied. The method contains a criterion for signal filtration andis insensitive to disturbances, run truncation and sampling irregularity. Fast Fourier Transform (FFT) may have an auxiliary significance for preliminary spectral analysis. Its main disadvantage is that in order tobuild a smoothing-out filter its parameters should be determined in advance, e.g. by applying one of theremaining methods
Słowa kluczowe
Wydawca
-
Rocznik
Tom
13
Numer
4
Opis fizyczny
p.15-22,fig.,ref.
Twórcy
  • Mechanic-Electric Faculty, Polish Naval University, Smidowicza 69, 81-103 Gdynia, Poland
Bibliografia
  • 1. Lynos R. G.: Introduction to the digital processing of signals(in Polish), WKŁ (Communication publishing house), Warszawa, 2003
  • 2. Max J.: Mietody i tiechnika obrabotki signałow pri fiziczieskichizmierienijach (translation from French,1981), v.1, MIR, Moskwa, 1983
  • 3. Morawski L., Polanowski S., Szuca Z.: Processing stand-test results of a photo-optic torque meter with the use of movable approximation (in Polish). Proc. of 26th Symp. on Ship Power Plants. Zeszyty Naukowe AMW (Scientific Bulletins of PolishNaval Academy). 2005
  • 4. Morawski L., Sikora M.: Application of the photo-optic torque meter to estimation of torque and rotational speed fluctuationsof the propeller shaft of ship. 6th Slovak and Czech Conference : SENSOR and SENSOR SYSTEM ‘97. Kosice-Presov. 1997
  • 5. Polanowski. S.: The processing of indicator diagrams with the use of the moving approximating objects. Combustion Engines. No 1/2005
  • 6. Enslein K., Ralston A., Wilf H. S. (Editors): Statistical Methods for Digital Computers. J. Wiley, 1977 .
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.agro-0304286d-1155-44e3-b928-3fe68f0eefe5
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