Damage Detection on Sudden Stiffness Reduction Based on Discrete Wavelet Transform

<table class="table-group" width="800px"><tr class="fig-image" id="a"><td><img alt="807620.fig.0013a" src="https://static.hindawi.com/articles/tswj/volume-2014/807620/figures/807620.fig.0013a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b>Sinusoidal excitation</td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="807620.fig.0013b" src="https://static.hindawi.com/articles/tswj/volume-2014/807620/figures/807620.fig.0013b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b>Impulse excitation</td></tr></table></td></tr></table>

<table>Damage detection using db4 wavelets.</table>

The Scientific World Journal

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Figure 13

Figure 13: Damage Detection on Sudden Stiffness Reduction Based on Discrete Wavelet Transform 