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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.
-
- ## function sysp = parallel(Asys,Bsys)
- ## Forms the parallel connection of two systems.
- ##
- ## ____________________
- ## | ________ |
- ## u ----->|----> | Asys |--->|----> y1
- ## | | -------- |
- ## | | ________ |
- ## |--->|----> | Bsys |--->|----> y2
- ## | -------- |
- ## --------------------
- ## Ksys
-
- function sysp = parallel (Asys, Bsys)
-
- ## Written by David Clem August 15, 1994
- ## completely rewritten Oct 1996 a s hodel
- ## SYS_INTERNAL accesses members of system structure
-
- if(nargin != 2)
- usage("sysp = parallel(Asys,Bsys)");
- endif
- if(! is_struct(Asys) )
- error("1st input argument is not a system data structure")
- elseif (! is_struct(Bsys) )
- error("2nd input argument is not a system data structure")
- endif
- [Ann,Anz,mA] = sysdimensions(Asys);
- [Bnn,Bnz,mB] = sysdimensions(Bsys);
- if(mA != mB)
- error(["Asys has ",num2str(mA)," inputs, Bsys has ",num2str(mB)," inputs"]);
- endif
-
- ## save signal names
- Ain = sysgetsignals(Asys,"in");
-
- ## change signal names to avoid warning messages from sysgroup
- Asys = syssetsignals(Asys,"in",sysdefioname(length(Ain),"Ain_u"));
- Bsys = syssetsignals(Bsys,"in",sysdefioname(length(Ain),"Bin_u"));
-
- sysp = sysgroup(Asys,Bsys);
- sysD = ss2sys([],[],[],[eye(mA);eye(mA)]);
-
- sysp = sysmult(sysp,sysD);
- sysp = syssetsignals(sysp,"in",Ain);
-
- endfunction
-