Application of Wavelet Method in Signal Analysis - Two Case Studies

摘要

Wavelet analysis was applied in two case studies. The first case is the signal analysis of a record of propeller-induced underwater pressure. The travelling bubbles collapsing noise was separated from the low frequency signal, which is related to the blade rate, by means of wavelet analysis and thereby could be studied in detail. The second case is about the separation of the acceleration due to the structural vibration from the rigid body acceleration recorded in full-scale trial of a planing boat in waves. The results from the two cases show that the wavelet analysis is an efficient tool for separating signals resulted from different mechanisms.