MULTI-SPECTRAL ANALYSIS OF THE SELF GENERATED TORQUE’S SIGNAL WITHIN A 4X4 AUTOMOTIVE DRIVELINE

Abstract

This paper presents the way of achieving a data multi-spectral analysis and filtering. The specific data have been obtained by testing a 4x4 military vehicle’s driveline while performing its motion with a tire radii difference between its axles. The mono-spectral analysis is a primary form of frequency analysis and it is described in first part of this article. It uses the amplitude and power spectra. The multi-spectral analysis is able to make the difference between the linear and non-linear components. It is quite useful since the systems are non-linear, time dependant. After multi-spectral analysis we do the data filtering. Finally, we decided that the most suitable filter would a 3rd order Savitzky-Golay filter.