Application of movable approximation and wavelet decomposition to smoothing-out procedure of ship engine indicator diagrams

• Autorzy: Polanowski S.
• Języki publikacji: EN

Abstrakty

EN

In this paper - on the basis of indicator diagram processing taken as an example - were shown possibilities of the smoothing-out and decomposing of run disturbances with the use of the movable multiple approximation based on the least squares criterion. The notion was defined of movable approximating object and constraints used to form approximation features. It was demonstrated that the multiple approximation can be used to decompose disturbances out of an analyzed run. The obtained smoothing-out results were compared with those obtained from full-interval approximation of runs by means of splines as well as wavelet decomposition with using various wavelets, Wavelet Explorer and Mathematica software. Smoothing-out quality was assessed by comparing runs of first derivatives which play crucial role in the advanced processing of indicator diagrams

• Wydawca: -
• Czasopismo: Polish Maritime Research
• Rocznik: 2007
• Tom: 14
• Numer: 2
• Opis fizyczny: p.12-17,fig.,ref.

Twórcy

autor

Polanowski S.

• Mechanic-Electric Faculty, Polish Naval University, Smidowicza 69, 81-103 Gdynia, Poland

Bibliografia

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• 3. Polanowski S.: The Following Approximation of Cylinder Pressure Run and Generation of Derivatives and Integrals. Journal of Polish CIMAC. 1996
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• 6. Polanowski S., Zellma M.: The peak value determination of cylinder pressure rate with the basic splines or follow-up approximation. Proc. of the Conference KONES’97
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• 10. Staś M. J.: Preparation of diesel engine indicator diagrams for cycle calculations. Proc. of the Conference KONES’99.
• 11. Wysocki H., Polanowski S.: Wavelet decomposition of ship engine indicator diagram by means of Wavelet Explorer software (in Polish). Scientific Bulletins of Polish Naval University (Zeszyty Naukowe AMW)No. 1(160). Gdynia, 2005