/usr/share/octave/packages/ocs-0.1.5/sbn/Mvoltagesources.m is in octave-ocs 0.1.5-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 | ## Copyright (C) 2006,2007,2008 Carlo de Falco
##
## This file is part of:
## OCS - A Circuit Simulator for Octave
##
## OCS 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.
##
## This program 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 this program (see the file LICENSE); if not,
## see <http://www.gnu.org/licenses/>.
##
## author: Carlo de Falco <cdf _AT_ users.sourceforge.net>
## -*- texinfo -*-
##
## @deftypefn{Function File} @
## {[@var{a},@var{b},@var{c}]=} Mvoltagesources(@var{string},@var{parameters},@
## @var{parameternames},@var{extvar},@var{intvar},@var{t})
##
## SBN file implementing models for voltage sources.
##
## @var{string} is used to select among models. Parameters are listed
## as inner items. Possible models are:
##
## @enumerate
## @item @var{string} = "DC" (Static indipendent voltage source)
## @itemize @minus
## @item V -> Current source value
## @end itemize
## @item @var{string} = "sinwave" (Sinusoidal indipendent voltage
## source)
## @itemize @minus
## @item shift -> mean value of sinusoidal input
## @item Ampl -> amplitude of sinusoidal wave
## @item f -> frequency of sinusoidal wave
## @item delay -> delay of sinusoidal wave
## @end itemize
## @item @var{string} = "pwl" (Piecewise linear voltage source)
## @itemize @minus
## @item takes as parameter times and values. For example @code{0 1 4 6}
## means at time instant 0 value 1, at time instant 4 value 6, etc.
## @end itemize
## @item @var{string} = "squarewave" (Square wave)
## @itemize @minus
## @item low -> low-state value
## @item high -> high-state value
## @item tlow -> duration of low-state
## @item thigh -> duration of high-state
## @item delay -> delay of square wave
## @item start -> starting voltage value
## @end itemize
## @item @var{string} = "step" (Voltage step)
## @itemize @minus
## @item low -> low-state value
## @item high -> high-state value
## @item tstep -> time instant of step transition
## @end itemize
## @item @var{string} = "VCVS" (Voltage controlled voltage source)
## @itemize @minus
## @item K -> Control parameter
## @end itemize
## @end enumerate
##
## See the @cite{IFF file format specifications} for details about
## the output structures.
##
## @seealso{prs_iff,asm_initialize_system,asm_build_system}
## @end deftypefn
function [a,b,c] = Mvoltagesources (string,parameters,parameternames,extvar,intvar,t)
if isempty(intvar)
intvar = 0;
endif
switch string
##LCR part
case "DC"
for ii=1:length(parameternames)
eval([parameternames{ii} "=" num2str(parameters(ii)) ";"])
endfor
j = intvar(1);
a = zeros(3);
b = [0 0 1;0 0 -1;1 -1 0];
c = [0 0 -V];
break
## NLC part
case "sinwave"
for ii=1:length(parameternames)
eval([parameternames{ii} "=" num2str(parameters(ii)) ";"])
endfor
DV = shift+Ampl * sin(2*pi*(t+delay)*f );
j = intvar(1);
a = zeros(3);
b = [0 0 1;0 0 -1;1 -1 0];
c = [0 0 -DV]' + b * [extvar;intvar];
break
case "pwl"
times = parameters(1:2:end-1);
values= parameters(2:2:end);
DV = interp1(times,values,t,"linear","extrap");
j = intvar(1);
a = zeros(3);
b = [0 0 1;0 0 -1;1 -1 0];
c = [0 0 -DV]' + b * [extvar;intvar];
break
case "squarewave"
for ii=1:length(parameternames)
eval([parameternames{ii} "=" num2str(parameters(ii)) ";"])
endfor
if t<delay
if exist("start")
DV=start;
else
DV=low;
endif
else
T = tlow+thigh;
t = mod(t-delay,T);
if t<tlow
DV = low;
else
DV = high;
endif
endif
j = intvar(1);
a = zeros(3);
b = [0 0 1;0 0 -1;1 -1 0];
c = [0 0 -DV]' + b * [extvar;intvar];
break
case "step"
for ii=1:length(parameternames)
eval([parameternames{ii} "=" num2str(parameters(ii)) ";"])
endfor
if t<tstep
DV=low;
else
DV = high;
endif
j = intvar(1);
a = zeros(3);
b = [0 0 1;0 0 -1;1 -1 0];
c = [0 0 -DV]' + b * [extvar;intvar];
break
case "VCVS"
K = 1;
for ii=1:length(parameternames)
eval([parameternames{ii} "=" num2str(parameters(ii)) ";"])
endfor
j = intvar(1);
a = zeros(5);
b = [0 0 0 0 1;0 0 0 0 -1;0 0 0 0 0;0 0 0 0 0;1 -1 -K K 0];
c = zeros(5,1);
break
otherwise
error (["unknown section:" string])
endswitch
endfunction
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