FFT suspension analysis

Here are our CFD links and discussions about aerodynamics, suspension, driver safety and tyres. Please stick to F1 on this forum.
User avatar
jon-mullen
1
Joined: 10 Sep 2008, 02:56
Location: Big Blue Nation
Contact:

Re: FFT suspension analysis

Post

pwelch is a power spectrum, it's the FFT^2.
Loud idiot in red since 2010
United States Grand Prix Club, because there's more to racing than NASCAR

User avatar
fasteddiev
2
Joined: 29 Apr 2013, 02:46

Re: FFT suspension analysis

Post

The greeN data represents the real data from a GP2 car, the blue is the simulated data.

I got the idea to use the pwelch from the MoTeC website.

http://www.motec.com/forum/viewtopic.php?f=26&t=85


From MATLAB site,

Pwelch is a spectrum estimator. It computes an averaged squared
magnitude of the Fourier
transform of a signal. In short, it computes a set of smaller FFTs
(using sliding windows),
computes the magnitude square of each, and averages them.

Also, note the display default for Pwelch is in dB (logarithmic).