<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>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.</p></abstract>

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.

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

Polish Maritime Research

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...

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

Publié en ligne: 20 juin 2007

Pages: 12 - 17

DOI: https://doi.org/10.2478/v10012-007-0008-y

Mots clés
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

This content is open access.

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

Publié en ligne: 20 juin 2007

Pages: 12 - 17

DOI: https://doi.org/10.2478/v10012-007-0008-y

Mots cléssmoothing-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

This content is open access.

Mots clés
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