function [port_bonds, status] = abg2cbg(system_name, ...
system_type, full_name, ...
port_bonds, port_bond_direction, port_status, typefile, infofile)
% abg2cbg - acausal to causal bg conversion
%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %%%%% Model Transformation Tools %%%%%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Matlab function abg2cbg.m
% Acausal bond graph to causal bond graph: mfile format
% [bonds,status] = abg2cbg(system_name, system_type, full_name, port_bonds, infofile)
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %% Version control history
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %% $Id$
% %% $Log$
% %% Revision 1.24 1998/06/25 17:45:03 peterg
% %% No change -- but checked that explicit causality works!
% %%
% %% Revision 1.23 1998/04/04 10:46:37 peterg
% %% Coerces port bonds to have smae direction as the imposing bonds
% %% _cbg now generates the (coerced) components as welll as the (coerced)
% %% causality.
% %%
% %% Revision 1.22 1997/08/19 10:21:09 peterg
% %% Only copy port cuaslity info if not already set within the
% %% subsystem. I thought I'd done this already ....
% %%
% %% Revision 1.21 1997/08/18 16:25:25 peterg
% %% Minor bug fixes
% %%
% %% Revision 1.20 1997/08/18 12:45:24 peterg
% %% Replaced: comp_bonds = bonds(bond_list,:)
% %% by: for kk = 1:n_comp
% %% comp_bonds(kk,:) = bonds(comp(kk),:);
% %% end;
% %%
% %% to avoid an octave bug in 1.92.
% %%
% %% Revision 1.19 1997/08/18 11:23:59 peterg
% %% Main component loop now misses out the ports (SS:[]) -- the causality
% %% is merely passed through these components.
% %%
% %% Revision 1.18 1997/08/08 08:11:04 peterg
% %% Suppress compoment trace.
% %%
% %% Revision 1.17 1997/08/07 16:10:13 peterg
% %% Move the if status .. to the beginning of the main loop.
% %%
% %% Revision 1.16 1997/08/04 13:11:19 peterg
% %% Only change to component-orientated causality for simple components
% %% NOT for compound components.
% %%
% %% Revision 1.15 1997/01/05 12:25:59 peterg
% %% More informative message about port bonds incompatible with ports
% %%
% %% Revision 1.14 1996/12/31 16:20:42 peterg
% %% Just write causality information at top level -- it gets a bit
% %% voluminous if written at deeper levels.
% %%
% %% Revision 1.13 1996/12/31 11:49:09 peterg
% %% Don't copy port bond causality if already set -- allows subsystem
% %% causality to be preset directely on named SS.
% %%
% %% Revision 1.12 1996/12/31 11:42:36 peterg
% %% *** empty log message ***
% %%
% %% Revision 1.11 1996/12/07 17:10:48 peterg
% %% Allows port SS at top level - ie takes it to be an ardianry SS at top
% %% level.
% %%
% %% Revision 1.10 1996/12/04 21:48:55 peterg
% %% Compares full-name with empty string (instead of testing for zero
% %% length.
% %%
% %% Revision 1.9 1996/08/30 12:55:40 peter
% %% More heirachical stuff added.
% %%
% %% Revision 1.8 1996/08/26 10:04:25 peterg
% %% Fixed error due to a line wrap.
% %%
% %%Revision 1.7 1996/08/16 12:58:58 peter
% %% Now does preferred causality of I and C.
% %% Revision 1.6 1996/08/09 08:27:29 peter
% %% Added a few deguging lines
% %%
% %% Revision 1.5 1996/08/08 18:06:18 peter
% %% Unified file naming scheme
% %%
% %% Revision 1.4 1996/08/08 08:30:06 peter
% %% The cbg filename contains the system name - this makes things easier
% %% when setting up the m to fig translation and m to ese translation
% %%
% %% Revision 1.3 1996/08/05 18:53:21 peter
% %% Fixed bug passing causality from subsystems.
% %%
% %% Revision 1.2 1996/08/05 15:41:41 peter
% %% Now recursively does causality on subsystems.
% %%
% %% Revision 1.1 1996/08/04 17:55:55 peter
% %% Initial revision
% %%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
pc = '%';
if nargin<1
system_name = 'no_name';
end;
if nargin<4
port_bonds = [];
end;
if nargin<5
infofile = 'stdout';
end;
% Are we at the top level of the heirarchy?
at_top_level = strcmp(full_name, '');
% Create a file to contain shell commands which map subsystem types
% onto components
if at_top_level % Then at top level
fprintf(typefile, '# Commands to map types onto subsystems\n');
fprintf(typefile, '# File %s_type.sh\n', system_name);
fprintf(typefile, '# Generated by MTT on %s\n\n', date);
end;
% Create the (full) system name
if at_top_level
full_name = system_name;
system_type = system_name;
else
full_name = [full_name, '_', system_name];
end;
% Add to file to contain shell commands which map subsystem types
% onto components
fprintf(typefile, '$1%s$2%s$3\n', system_type, full_name);
fun_name = [system_type, '_abg'];
disp('====================================');
disp(['BEGIN: ', full_name, ' (', fun_name, ')']);
disp('====================================');
% If no such function - then there is nothing to be done.
if exist(fun_name)~=2
mtt_info(['m-file ', fun_name, ' does not exist'], infofile);
bonds = [];
status = [];
return
end;
% Evaluate the system function to get the bonds and number of ports
eval(['[bonds,components,n_ports]=', fun_name, ',']);
% Find number of bonds
[n_bonds,columns] = size(bonds);
if (columns ~= 2)&(n_bonds>0)
error('Incorrect bonds matrix: must have 2 columns');
end;
% Find number of components
[n_components,columns] = size(components);
if n_components==0 % there is nothing to be done
return
end;
port_bond_direction
% Coerce the port (SS:[]) component bonds to have the same direction as
% of the bonds in the encapsulating system -- but not at top level
if (n_ports>0)&&(~at_top_level)
port_bond_index = abs(components(1:n_ports,1)) % relevant bond numbers
for i=1:n_ports
% Is the direction different?
if (sign(components(i,1))~=port_bond_direction(i))
disp(sprintf("Flip port %i",i));
% Flip direction at port
components(i,1) = - components(i,1);
% and at the other end
for j=n_ports+1:n_components
for k=1:columns
if (abs(components(j,k))==port_bond_index(i))
components(j,k) = - components(j,k);
end
end
end;
% Flip the bond causalities (these are arrow-orientated)
bonds(port_bond_index(i),:) = -bonds(port_bond_index(i),:);
end
end
end
% Set initial status
status = -ones(n_components,1);
% If not at top level, then copy the port bonds.
if ~at_top_level
% Find number of port bonds
[n_port_bonds,columns] = size(port_bonds);
% Check compatibility - if ok copy port bonds to the internal bonds list.
if n_port_bonds~=n_ports
mtt_info(sprintf('%s: %1.0f port bonds incompatible with %1.0f ports', ...
full_name, n_port_bonds, n_ports), infofile);
else % Copy the port bonds & status
for j = 1:n_port_bonds
jj = port_bond_index(j);
for k = 1:2
if bonds(jj,k)==0 % only copy if not already set
bonds(jj,k) = port_bonds(j,k);
end;
end;
status(1:n_ports) = port_status;
end
end
else
n_port_bonds=0;
end;
% bonds,port_bonds
% Causality indicator
total = 2*n_bonds;
done = sum(sum(abs(bonds)))/total*100;
% Outer while loop sets preferred causality
ci_index=1;
while( ci_index>0)
old_done = inf;
% Inner loop propagates causality
while done~=old_done
% disp(sprintf('Causality is %3.0f%s complete.', done, pc));
old_done = done;
for i = n_port_bonds+1:n_components % Miss out the ports
if status(i) ~= 0 % only do this if causality not yet complete
% Get the bonds on this component
comp = nozeros(components(i,:))
bond_list = abs(comp);
direction = sign(comp)'*[1 1];
n_bonds = length(bond_list);
% Get the component details
eval([ '[comp_type,name,cr,arg] = ', system_type, '_cmp(i);' ]);
% Change name of 0 and 1 components -- matlab doesn't like numbers here
if strcmp(comp_type,'0')
comp_type = 'zero';
end;
if strcmp(comp_type,'1')
comp_type = 'one';
end;
% Component causality procedure name
cause_name = [comp_type, '_cause'];
% Component equation procedure name
eqn_name = [comp_type, '_eqn'];
% Bonds on this component (arrow-orientated) -- these become the
% port bonds on the ith component of this subsystem.
comp_bonds=[];
for kk = 1:n_bonds
comp_bonds(kk,:) = bonds(bond_list(kk),:);
end;
% Invoke the appropriate causality procedure
if exist(eqn_name)~=2 % Try a compound component
% Port status depends on whether the corresponding bonds are
% fully causal at this stage.
one = ones(n_bonds,1);
port_status = (sum(abs(comp_bonds'))'==2*one) - one;
% Direction of bonds on the ports (0 if next to port)
port_bond_direction = -sign(components(i,1:n_bonds))';
% If there is a predefined causality function; use it
if exist(cause_name)==2
% Convert from arrow orientated to component orientated causality
comp_bonds = comp_bonds.*(port_bond_direction*[1 1]);
% Evaluate the built-in causality procedure
eval([ '[comp_bonds] = ', cause_name, '(comp_bonds);' ]);
% and convert from component orientated to arrow orientated causality
comp_bonds = comp_bonds.*(port_bond_direction*[1 1]);
end;
[comp_bonds,s] = abg2cbg(name, comp_type, full_name,
comp_bonds, port_bond_direction, port_status, ...
typefile, infofile);
% Create a single status from the status vector s
if max(abs(s)) == 0 % Causal
status(i) = 0;
else
if max(s) == 1 % At least one component is overcausal
status(i) = 1;
else % no component is overcausal but some are undercausal
status(i) = -1;
end;
end;
else % its a simple component -- or explicit causality defined
disp(['---', name, ' (', cause_name, ') ---']);
comp_bonds_in = comp_bonds
% Convert from arrow orientated to component orientated causality
comp_bonds = comp_bonds.*direction;
% Evaluate the built-in causality procedure
eval([ '[comp_bonds,status(i)] = ', cause_name, '(comp_bonds);' ]);
% and convert from component orientated to arrow orientated causality
comp_bonds = comp_bonds.*direction;
comp_bonds_out = comp_bonds
end;
% Update the full bonds list
bonds(bond_list,:) = comp_bonds
end;
end;
done = sum(sum(abs(bonds)))/total*100;
%disp(sprintf('Causality is %3.0f%s complete.', done, pc), infofile));
end;
% Set causality of a C or I which is not already set
[ci_index,prefered] = getdynamic(status,system_type);
if ci_index>0
bond_index = components(ci_index,1) % its a one port
bonds(bond_index,1) = prefered;
bonds(bond_index,2) = prefered;
end;
end;
% Print final causality
final_done = (sum(status==zeros(n_components,1))/n_components)*100;
if at_top_level
mtt_info(sprintf('Final causality of %s is %3.0f%s complete.', ...
full_name, final_done, pc), infofile);
% List overcausal bonds
[over_causal_bonds,n] = getindex(status,1);
if n>0
for i=over_causal_bonds'
eval([ '[comp_type,name] = ', system_type, '_cmp(i);' ]);
mtt_info(sprintf('Component %s (%s) is overcausal', name, comp_type), ...
infofile);
end;
end;
% List undercausal bonds
[under_causal_bonds,n] = getindex(status,-1);
if n>0
for i=under_causal_bonds'
eval([ '[comp_type,name] = ', system_type, '_cmp(i);' ]);
mtt_info(sprintf('Component %s (%s) is undercausal', name, comp_type), ...
infofile);
end;
end;
end;
% $$$ file_name = [full_name, '_', system_type]
file_name = [full_name, '_cbg.m'];
disp(['Writing ', file_name]);
cbgfilenum = fopen(file_name,'w');
write_cbg(cbgfilenum,full_name,system_type,bonds,status,components);
fclose(cbgfilenum);
% Return the port bonds - arrow orientated causality - and the direction
if ~at_top_level % Not at top level
j = abs(components(1:n_ports,1)) %relevant bond numbers
port_bonds = bonds(j,:)
end;
disp('====================================');
disp(['END: ', full_name, ' (', fun_name, ')']);
disp('====================================');