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variation of acceleration magnitude with bandwidth

Question asked by Benp on Dec 3, 2013
Latest reply on Dec 3, 2013 by venkat

I am trying to observe the acceleration caused due to a deterministic sudden impact with an ADXL375 device.

I notice that the peak acceleration being reported varies with the bandwidth setting. The value gos as high as 150g at a BW of 400Hz, and the same impact drops down to about 60g when sampled at 100 Hz.

Is this variation a result of the decimation being performed to down sample the acceleration signal to the desired (lower) bandwidth?

How can I tell what is the "correct" peak acceleration based on these readings?


The width of the acceleration spike at impact was measured to be of the order of 10 millisec.