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Re: Bode weirdness


From: WJ Atsma
Subject: Re: Bode weirdness
Date: Wed, 25 Jun 2003 19:53:10 +0200

What you see is probably the phase jumping from -180 to 180 or visa versa. There is no difference between a phase angle of alpha and alpha+360, so it plots everything in a comfy range on your screen. It also at a glance shows you where possible stability snags might be in a feedback loop.

Not an error.

Willem


On 2003.06.25 10:59 Dustin Vink wrote:

The bode plot does not work as it should.

Try this:

num = [1];
den = [1 1 1 1];
G = tf2sys(num,den);
bode(G)

The phase shows a jump, which is wrong of course. Anyone know how to
solve this error?

Octave, version 2.1.49



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-------------------------------------------------------------
Octave is freely available under the terms of the GNU GPL.

Octave's home on the web:  http://www.octave.org
How to fund new projects:  http://www.octave.org/funding.html
Subscription information:  http://www.octave.org/archive.html
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