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Control toolbox: Problems emulating M*TLAB's cloop

From: Thomas Hoffmann
Subject: Control toolbox: Problems emulating M*TLAB's cloop
Date: Thu, 18 May 2000 10:06:47 +0200 (METDST)

With Octaves's developmental version I tried to investigate a system
controlled with a PID controller. In an tutorial I saw MATLAB's cloop() 
function, which I was able to mimick using buildssic() for a "plant"
and a proportional conroller (as systems s1 and s2).
Now I wanted to test the same with a PID controller, which Octave does
not accept, because it has "more zeros than poles".

Does anybody know how to construct the closed loop system, consisting of 
the plant and PID controller using OCST?


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