|The mode of the
frequencies and amplitudes was used to increase the accuracy of the maps. The
amplitude maps will provide a standard of comparison with the maps of the LGG
impacted plates when they are completed. Since the maps correspond with the bottom plate (where the PZTs are
attached) a wave pattern can be seen coming from the rods. The areas of high
amplitude represent constructive interference of waves, while the areas of
lower amplitude represent destructive interference of waves. Higher amplitudes
tend to occur in the region of PZTs.
As far as the frequency maps, it is more difficult to come to some
logical conclusion as to what is going on there. There is not an observable
pattern. One can, however, see how the frequency is distributed on the plate.
Future work will complete the mapping of impacted plates and then a
comparison can be made to the control plates to see if amplitudes and
frequencies are shifted. In this way dangerous impacts with space debris can
be monitored, hopefully predicting potential problems.