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.

Słowa kluczowe

EN

smoothing-out the runs; least squares method; full-interval approximation; movable approximation; decomposition of disturbances; cut constraints; glued constraints; riveted constraints; broken constraints; weighting factors; wavelet decomposition

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2007
• Tom: nr 2
• Strony: 12--17
• Opis fizyczny: Bibliogr. 11 poz., rys.

Twórcy

autor

Polanowski S.

• Polish Naval University,

Bibliografia

• 1. Polanowski S.: Analysis of measurement data with application of movable approximating objects (in Polish). Scientific Bulletins of Polish Naval University (Zeszyty Naukowe AMW), no. 2 (157). Gdynia, 2004
• 2. Polanowski S.: Follow-up approximation of combustion pressure run and generation of derivatives and integrals (in Polish). Journal of Internal Combustion Engines KONES, 1996
• 3. Polanowski S.: The Following Approximation of Cylinder Pressure Run and Generation of Derivatives and Integrals. Journal of Polish CIMAC. 1996
• 4. Polanowski S.: Smoothing and decomposition of disturbances of indicator diagrams with applications of the moving approximating objects with broken bonds. Vol. 12, Journal of Internal Combustion Engines – KONES. 2005
• 5. Polanowski S.: Fast processing of indicator diagram for control and steering purposes (in Polish). Proc. 3rd Scientific Symposium EKODIESEL’96. Warszawa, 1996
• 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
• 7. Polanowski. S.: The processing of indicator diagrams with the use of the moving approximating objects. Combustion Engines. No 1/2005.
• 8. Ralston A. : Introduction to numerical analysis (in Polish). Scientific Technical Publishing House (PWN). Warszawa, 1983
• 9. Savitzky A., Golay M.J.E.: Smoothing and Differentiation of Data by Simplified Least Squares Procedures. Vol. 36, Analytical Chemistry 1964
• 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