Impressive, that you did quite some ground work on data acquisition, but more so that your approach of double integration of an accelerometer signal results in a clean and recognizable position curve (~ an under-damped chassis with dry/stick friction).
I should ask what you mean by 'run out of travel' events because these would cause sharp acceleration spikes, whereas your position curve looks to be within harmonic boundaries. Did you feel/hear the hard bump stops yourself during this measurement? Perhaps you do mean highest/lowest position on the harmonic curve?
Just started a study on a custom EDC controller, but would rather use a u-Ctrl for that. Your PC setup is of course perfect for measurement and calibration, although I had hoped that more turn-key acquisition setups for accelerometers were available (at higher cost no doubt).
Last edited by eeghie; 02-11-2011 at 05:38 PM.