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1 # Copyright (C) 1996 A. Scottedward Hodel |
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2 # |
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3 # This file is part of Octave. |
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4 # |
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5 # Octave is free software; you can redistribute it and/or modify it |
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6 # under the terms of the GNU General Public License as published by the |
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7 # Free Software Foundation; either version 2, or (at your option) any |
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8 # later version. |
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9 # |
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10 # Octave is distributed in the hope that it will be useful, but WITHOUT |
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11 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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12 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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13 # for more details. |
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14 # |
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15 # You should have received a copy of the GNU General Public License |
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16 # along with Octave; see the file COPYING. If not, write to the Free |
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17 # Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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18 |
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19 function sysp = parallel(Asys,Bsys) |
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20 # function sysp = parallel(Asys,Bsys) |
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21 # Forms the parallel connection of two systems. |
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22 # |
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23 # ____________________ |
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24 # | ________ | |
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25 # u ----->|----> | Asys |--->|----> y1 |
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26 # | | -------- | |
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27 # | | ________ | |
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28 # |--->|----> | Bsys |--->|----> y2 |
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29 # | -------- | |
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30 # -------------------- |
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31 # Ksys |
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32 |
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33 # Written by David Clem August 15, 1994 |
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34 # completely rewritten Oct 1996 a s hodel |
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35 # SYS_INTERNAL accesses members of system structure |
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36 # $Revision: 2.0.0.2 $ |
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37 |
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38 if(nargin != 2) |
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39 usage("sysp = parallel(Asys,Bsys)"); |
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40 endif |
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41 if(! is_struct(Asys) ) |
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42 error("1st input argument is not a system data structure") |
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43 elseif (! is_struct(Bsys) ) |
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44 error("2nd input argument is not a system data structure") |
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45 endif |
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46 [Ann,Anz,mA] = sysdimensions(Asys); |
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47 [Bnn,Bnz,mB] = sysdimensions(Bsys); |
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48 if(mA != mB) |
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49 error(["Asys has ",num2str(mA)," inputs, Bsys has ",num2str(mB)," inputs"]); |
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50 endif |
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51 sysp = sysgroup(Asys,Bsys); |
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52 sysD = ss2sys([],[],[],[eye(mA);eye(mA)]); |
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53 |
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54 sysp = sysmult(sysp,sysD); |
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55 sysp = syssetsignals(sysp,"in",sysgetsignals(Asys,"in")); |
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56 |
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57 endfunction |
