function structure = FMR_eqn(name,bond_number,bonds,direction,cr,args, ...
structure,eqnfile);
% FMR_eqn - equations for flow-modulated resistor
%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %%%%% Model Transformation Tools %%%%%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Matlab function FMR_eqn
% FMR_eqn(name,bond_number,bonds,direction,cr,args, ...
% structure,eqnfile);
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %% Version control history
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %% $Id$
% %% $Log$
% %% Revision 1.1 1996/08/30 16:38:25 peter
% %% Initial revision
% %%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Copyright (c) P.J. Gawthrop, 1996.
if nargin<6
eqnfile = 'stdout';
end;
% Check that there are exactly two bonds.
if check_bonds(bonds,2,'FMR')==0
return
end
% There are 2 ports; extract the information
e_1 = bonds(1,1);
f_1 = bonds(1,2);
e_2 = bonds(2,1);
f_2 = bonds(2,2);
if f_2 == -1 % Standard with modulation
if f_1 == 1 % Flow out
op = '*';
else % Effort out
op = '/';
end;
fprintf(eqnfile, '%s := %s%s%s;\n', ...
varname(name,bond_number(1), -e_1), ...
varname(name,bond_number(1), e_1), ...
op, ...
varname(name,bond_number(2), -1));
else % Deduce modulation
fprintf(eqnfile, '%s := %s/%s;\n', ...
varname(name,bond_number(2), -1), ...
varname(name,bond_number(1), -1), ...
varname(name,bond_number(1), 1));
end;
% Effort on port 2 is always zero
fprintf(eqnfile, '%s := 0;\n', ...
varname(name,bond_number(2), 1));