Monthly Report for Space Robotic FMS PreCommercialization Development April 30, 2018
Beginning investigation of drive segment combinations for optimium excitation of modes which will identify particular forcing degrees of freedom. The out of plane modes (ie those suitable for measuring axial and moment, and to related extent shear DOF's) have nice clear, easy to identify peaks which are very good for overall resolution. The peaks for torsion dof is not as good, and so this investigation is to understand means of improvement.
AnalysisCombination of test data sets are being performed to identify characterists of modes. A means of defining modal participation factors, suitable to segmentially poled driving element is underway.
Software Simulationno change
Breadboard Manufacturingno change; accelerometers on underside of loading plate.
Some additional testing is being done to consider participation factors, and to allow for segmential combination checking. Testing is in below 3300 Hz (segments 0 to 3) range. Most peaks are sharp and easy to identify (better than initial work a year ago). Frequency peaks are quite similar to original results.
Plans for May.
Continue linear configuration testing (low frequency range) for some combined segments. Continue writing technical paper on issue of torsion degree of freedom result.