Mercurial > octave
view scripts/control/gram.m @ 3346:8dd4718801fd
[project @ 1999-11-09 18:18:12 by jwe]
author | jwe |
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date | Tue, 09 Nov 1999 18:18:37 +0000 |
parents | f7e4a95916f2 |
children | 69b167451491 |
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# Copyright (C) 1996 Auburn University. All Rights Reserved # # This file is part of Octave. # # Octave is free software; you can redistribute it and/or modify it # under the terms of the GNU General Public License as published by the # Free Software Foundation; either version 2, or (at your option) any # later version. # # Octave is distributed in the hope that it will be useful, but WITHOUT # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License # for more details. # # You should have received a copy of the GNU General Public License # along with Octave; see the file COPYING. If not, write to the Free # Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. ## -*- texinfo -*- ## @deftypefn {Function File } { @var{m} =} gram (@var{a}, @var{b}) ## Return controllability grammian @var{m} of the continuous time system ## @math{ dx/dt = a x + b u}. ## ## @var{m} satisfies @math{ a m + m a' + b b' = 0 }. ## @end deftypefn function m = gram(a,b) # Written by A. S. Hodel # let lyap do the error checking... m = lyap(a,b*b'); endfunction