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From: Yao Fu on 11 May 2010 12:34
TideMan <mulgor(a)gmail.com> wrote in message <5c385b4c-484a-4647-aca3-e9fb44080624(a)i8g2000pro.googlegroups.com>...
> On Aug 12, 7:23 pm, "Paul bu" <lingshan...(a)schaeffler.com> wrote:
> > Hi all,
> > I have a problem concerning the harmonic analysis of the motor-engine torsional oscillation.
> >
> > I want to decide the amplitude and phase of the excitation frequency and the harmonics. How can I get this?
>
> If you know the frequency a priori, you're better to fit amplitude and
> phase in the time domain using a Fourier series and Matlab's \
> facility for least-squares fit, IMHO.
> But if you don't know the frequency, then FFT may work better.
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