From: <HIDDEN>
Newsgroups: comp.soft-sys.matlab
Subject: Re: how can I get velocity and acceleration from angular position signal.
Date: Mon, 14 Jun 2010 17:26:05 +0000 (UTC)
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"Hiba " <> wrote in message <hv5h2a$sil$>...
> Hello everyone
> I would like to know the best Matlab function I could use in order to get velocity signal and acceleration acceleration from only the angular position signal.
> I kbnow that theres' methods like gradien, diff, but I don't get good results
> It's so important to use a function that could help me a velocity and acceleration signal, as precisely as possible.
> I appreciate your help.
> Regards
> Hiba

  If you are talking about an object's position in space, even in the two-dimensional xy-plane, knowing only an angular position is not sufficient information to determine its velocity and acceleration.  You need to have some kind of information about the object's distance from the point with respect to which the angle is being measured.

Roger Stafford