Wavelet Analysis of In-Cylinder LDV Velocity Measurements

Paper #:
  • 961921

Published:
  • 1996-10-01
Citation:
Wiktorsson, M., Lindoff, B., Johansson, B., and Soderberg, F., "Wavelet Analysis of In-Cylinder LDV Velocity Measurements," SAE Technical Paper 961921, 1996, https://doi.org/10.4271/961921.
Pages:
12
Abstract:
The object of this paper is to present a new way of analyzing in-cylinder velocity measurements. The technique is called Discrete Wavelet Transform (DWT) and it is similar to Fast Fourier Transform (FFT) with one important difference it is possible to obtain both time localized and frequency resolved information.This paper demonstrates the use of DWT calculations on in-cylinder LDV flow measurements for different combustion geometries in a natural gas converted truck engine. It will furthermore provide some information about how DWT can be used with in-cylinder measurements in the future.
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