420 Y. Soucy and F. Brassard 100.00 gIN Log 0.01 0.00 Hz 225.00 Fig. 35.5 Overlap of FRF’s from accelerometers on 3D printed mounting block (green) and PMMA mounting block (red) (Color figure online) Fig. 35.6 Geometrical representation of the instrumented points for the tested rover thus mounted on the rover. A geometric representation, generated by the LMS software, of these instrumented locations is presented in Fig. 35.6. As can be observed, this is significantly different than only monitoring the top portion of the main frame of the rover as was done in the earlier testing the rover and mast assembly. The total number of accelerometers was selected based on the fact that the data acquisition system is equipped with a 32 channel front-end. Assuming two shakers are exciting the test article simultaneously requiring two channels for force measurement, 30 channels become available for acceleration measurement for each run. Consequently, instrumenting the rover with 60 accelerometers allowed the acquisition of all measurement data with only two different runs. Each run was to measure acceleration on one side of the rover (plus one of the two points at the centre of the avionics box).
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