Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Calculating position from acceleration data using fourier transform

  1. Nov 14, 2011 #1
    Hi all,

    Hi have an evenly spaced set of data points corresponding to acceleration , where dt = 10 ms. From there I would like to calculate total displacement. First I get A(f) in herz, using Labview's fft algorithm. I then divide by -w2, where f= 1/dt. From that I take the inverse FFT. It's my understanding that should net me position in time, however the results I get make no sense to me (magnitude of position is several orders of magnitude smaller than acceleration). Any thoughts?
    I'm also curious about the units. If a(t) is in m/s2, after fft what units do I get on the y axis? Thanks
     
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted



Similar Discussions: Calculating position from acceleration data using fourier transform
Loading...