Dynamic excitation on a spacecraft

Historic measurement from 2000

This exam­p­le com­bi­nes the Vibro­gra­fie Sys­tem with a Pie­zo­s­ha­ker Modu­le for a non-des­truc­ti­ve inspec­tion. The heat shield with C‑Si‑C (car­bon fiber-sili­con com­po­si­te) of the pro­s­pec­ti­ve reco­very vehicle/ space­craft x38 was review­ed by She­aro­gra­phy.


For easier hand­ling, the Pie­zo­s­ha­ker modu­le is com­pres­sed on the sur­face of the object via a suc­tion base.
(a) Pie­zo­s­ha­ker modu­le, (b) the heat shield of the space­craft X38 © Flight of the space­craft X38.



The pic­tu­re shows the deter­mi­na­ti­on of times of the heat shield with the natu­ral fre­quen­cy (1400 Hz).



Local vibra­ti­on forms of defects at 10kHz and 18 kHz of the nose hood in the mark­ed area of the image. During the inspec­tions, two defects have been detec­ted in the upper area of the dog.