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- ## Copyright (C) 1996,1998 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.
-
- ## I think that this m-file can be deleted
- ## a.s.hodel@eng.auburn.edu - 4 Dec. 1998
-
- Ap = [0, 1;1960, 0];
- Bp = [0;-6261];
- Cp = [1, 0];
- Dp = 0;
-
- Gp = ss2sys(Ap,Bp,Cp,Dp,0,2,0,[],"delta_i","delta_y");
- Gp = syssetsignals(Gp,"st","delta_x1",1);
- Gp = syssetsignals(Gp,"st","delta_x2",2);
-
- Ak = [-20, 1;-22160, -200];
- Bk = [-20;-2160];
- Ck = [-3.5074, -0.0319];
- Dk = 0;
-
- Gk = ss2sys(Ak,Bk,Ck,Dk,0,2,0,[],"y","i");
- Gk = syssetsignals(Gk,"st","x1",1);
- Gk = syssetsignals(Gk,"st","x2",2);
-
- Gc = sysgroup(Gp,Gk);
-
- Gc = sysdup(Gc,[],[1, 2]);
- ## Gc = sysscale(Gc,[],diag([1,1,1,1]));
-
- Gc = sysconnect(Gc,[1, 2],[4, 3]);
- Gc = sysprune(Gc,1,[1, 2]);
-
- disp("after pruning, closed loop system is")
- sysout(Gc)
-
- ## Gc = sysdup(Gc,[],2);
- ## Gc = sysconnect(Gc,1,3);
- ## Gc = sysprune(Gc,1,1);
-
- is_stable(Gc)
- Gca = sys2ss(Gc);
- eig(Gca)
-
- [Gpa,Gpb,Gpc,Gpd] = sys2ss(Gp);
- [Gka,Gkb,Gkc,Gkd] = sys2ss(Gk);
- Acl = [Gpa, -Gpb*Gkc; Gkb*Gpc, Gka]
- eig(Acl)
-