How to determine the DeltaV at a location other than the CG?

Topics related to collision & Trajectory analysis formerly on our 'Registrants only' area however which we get asked about frequently so believe shoud be in the open forum too
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MSI
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How to determine the DeltaV at a location other than the CG?

Post by MSI » Thu Jul 05, 2012 12:07 pm

Q: How to determine the DeltaV at a location other than the CG?

A: A good starting point for a discussion of deltaV at locations other than the CG can be found in our 1997 paper:
  • In our research documented in that paper we created a hand calculation/spreadsheet analysis procedure to permit the calculation of the deltaV for any location on a vehicle. The reason we developed the technique was to analyze the RICSAC crash tests. In the RICSAC crash tests measurements were made from accelerometers located at locations other than the vehicle Center of Gravity (CG) and so had to be transformed back to the CG.
For medit32/msmac users it is a very simple task. Simply use the smacthp program:
  • SMACTHP is a post-processing tool for msmac which allows users to determine the time history of the acceleration and velocity at any location in the vehicle. The input for SMACTHP is a msmac output time history information.
For more information please see SMACTHP Example with RICSAC2
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