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From: | Lukas Reichlin |
Subject: | [Octave-bug-tracker] [bug #45918] control: Nyquist plot is incorrect |
Date: | Thu, 10 Sep 2015 20:21:04 +0000 |
User-agent: | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_5) AppleWebKit/600.8.9 (KHTML, like Gecko) Version/6.2.8 Safari/537.85.17 |
Follow-up Comment #3, bug #45918 (project octave): I don't get it. There is no zero-pole cancellation due to the negative sign. octave:17> sys = tf([-10 10], [1 1 0]) Transfer function 'sys' from input 'u1' to output ... -10 s + 10 y1: ---------- s^2 + s Continuous-time model. octave:18> [z, k] = zero (sys) z = 1 k = -10 octave:19> pole (sys) ans = -1 0 octave:20> sysmin = minreal (sys) Transfer function 'sysmin' from input 'u1' to output ... -10 s + 10 y1: ---------- s^2 + s Continuous-time model. octave:21> _______________________________________________________ Reply to this item at: <http://savannah.gnu.org/bugs/?45918> _______________________________________________ Message sent via/by Savannah http://savannah.gnu.org/
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