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From: | Lukas Reichlin |
Subject: | [Octave-bug-tracker] [bug #40932] control package: system format affects computation of controller |
Date: | Wed, 18 Dec 2013 08:38:30 +0000 |
User-agent: | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_5) AppleWebKit/537.73.11 (KHTML, like Gecko) Version/6.1.1 Safari/537.73.11 |
Follow-up Comment #3, bug #40932 (project octave): Thanks for your report. I can confirm the problem with file1.m on my Mac: error: ncfsyn: 2: the Z-Riccati equation is not solved successfully error: memory exhausted or requested size too large for range of Octave's index type -- trying to return to prompt The problem is line 20 in file1.m: G=[g11 g12 g13; g21 g22 g23; g31 g32 g33]; With the current implementation of horzcat and vertcat, transfer function interconnections are calculated in state-space, requiring several conversions back and forth. This causes the extremely high model orders of G and Gss due to numerical problems. The solution is described in my projects file for quite some time: http://sourceforge.net/p/octave/control/ci/default/tree/devel/PROJECTS It looks like I should finally tackle this problem! _______________________________________________________ Reply to this item at: <http://savannah.gnu.org/bugs/?40932> _______________________________________________ Message sent via/by Savannah http://savannah.gnu.org/
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