Health Monitoring of Ship Hulls Using Wavelets, Wavelet Packets and System211 Identification Techniques

摘要

This report was written as a diploma thesis at Forsvarets forskningsinstitutt211u001eduring 1997 and 1998. The purpose of the work is to examine methods for detecting 211u001eand characterizing transient structural vibrations in a ship hull. The theory of 211u001ewavelets and wavelet packets is reviewed. An efficient implementation of a 211u001ewavelet-based matched filter for detecting and characterizing transient 211u001evibrations is documented.