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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?
Thomas.
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**Control toolbox: Problems emulating M*TLAB's cloop**,
*Thomas Hoffmann* **<=**