// $Id$
-#include <simgear/misc/exception.hxx>
+#include <simgear/structure/exception.hxx>
#include <simgear/misc/sg_path.hxx>
#include <Main/fg_props.hxx>
FGElectricalComponent::FGElectricalComponent() :
kind(-1),
name(""),
- value(0.0)
+ volts(0.0),
+ load_amps(0.0)
{
}
}
volts = node->getDoubleValue("volts");
amps = node->getDoubleValue("amps");
+ rpm_src = node->getStringValue("rpm-source");
int i;
for ( i = 0; i < node->nChildren(); ++i ) {
SGPropertyNode *child = node->getChild(i);
// cout << " scanning: " << child->getName() << endl;
- if ( (string)child->getName() == "prop" ) {
+ if ( !strcmp(child->getName(), "prop") ) {
string prop = child->getStringValue();
// cout << " Adding prop = " << prop << endl;
add_prop( prop );
}
}
- _rpm_node = fgGetNode("/engines/engine[0]/rpm", true);
+ _rpm_node = fgGetNode( rpm_src.c_str(), true);
}
int i;
for ( i = 0; i < node->nChildren(); ++i ) {
SGPropertyNode *child = node->getChild(i);
- if ( (string)child->getName() == "prop" ) {
+ if ( !strcmp(child->getName(), "prop") ) {
string prop = child->getStringValue();
add_prop( prop );
}
FGElectricalOutput::FGElectricalOutput ( SGPropertyNode *node ) {
kind = FG_OUTPUT;
+ output_amps = 0.1; // arbitrary default value
name = node->getStringValue("name");
+ SGPropertyNode *draw = node->getNode("rated-draw");
+ if ( draw != NULL ) {
+ output_amps = draw->getDoubleValue();
+ }
+ // cout << "rated draw = " << output_amps << endl;
+
int i;
for ( i = 0; i < node->nChildren(); ++i ) {
SGPropertyNode *child = node->getChild(i);
- if ( (string)child->getName() == "prop" ) {
+ if ( !strcmp(child->getName(), "prop") ) {
string prop = child->getStringValue();
add_prop( prop );
}
}
+FGElectricalSwitch::FGElectricalSwitch( SGPropertyNode *node ) :
+ switch_node( NULL ),
+ rating_amps( 0.0f ),
+ circuit_breaker( false )
+{
+ bool initial_state = true;
+ int i;
+ for ( i = 0; i < node->nChildren(); ++i ) {
+ SGPropertyNode *child = node->getChild(i);
+ string cname = child->getName();
+ string cval = child->getStringValue();
+ if ( cname == "prop" ) {
+ switch_node = fgGetNode( cval.c_str(), true );
+ // cout << "switch node = " << cval << endl;
+ } else if ( cname == "initial-state" ) {
+ if ( cval == "off" || cval == "false" ) {
+ initial_state = false;
+ }
+ // cout << "initial state = " << initial_state << endl;
+ } else if ( cname == "rating-amps" ) {
+ rating_amps = atof( cval.c_str() );
+ circuit_breaker = true;
+ // cout << "initial state = " << initial_state << endl;
+ }
+ }
+
+ switch_node->setBoolValue( initial_state );
+ // cout << " value = " << switch_node->getBoolValue() << endl;
+}
+
+
FGElectricalConnector::FGElectricalConnector ( SGPropertyNode *node,
FGElectricalSystem *es ) {
kind = FG_CONNECTOR;
<< child->getStringValue() );
}
} else if ( cname == "switch" ) {
- // set default value of switch to true
- // cout << "Switch = " << child->getStringValue() << endl;
- fgSetBool( child->getStringValue(), true );
- add_switch( fgGetNode( child->getStringValue(), true ) );
- }
- }
-
- // do a 2nd pass to pick up starting switch value if specified
- for ( i = 0; i < node->nChildren(); ++i ) {
- SGPropertyNode *child = node->getChild(i);
- string cname = child->getName();
- string cval = child->getStringValue();
- // cout << " " << cname << " = " << cval << endl;
- if ( cname == "initial-state" ) {
- if ( cval == "off" ) {
- set_switches( false );
- } else {
- set_switches( true );
- }
+ // cout << "Switch = " << child->getStringValue() << endl;
+ FGElectricalSwitch s( child );
+ add_switch( s );
}
}
}
// set all switches to the specified state
void FGElectricalConnector::set_switches( bool state ) {
- cout << "setting switch state to " << state << endl;
+ // cout << "setting switch state to " << state << endl;
for ( unsigned int i = 0; i < switches.size(); ++i ) {
- switches[i]->setBoolValue( state );
+ switches[i].set_state( state );
}
}
bool FGElectricalConnector::get_state() {
unsigned int i;
for ( i = 0; i < switches.size(); ++i ) {
- if ( ! switches[i]->getBoolValue() ) {
+ if ( ! switches[i].get_state() ) {
return false;
}
}
config_props = new SGPropertyNode;
SGPropertyNode *path_n = fgGetNode("/sim/systems/electrical/path");
+ _volts_out = fgGetNode( "/systems/electrical/volts", true );
+ _amps_out = fgGetNode( "/systems/electrical/amps", true );
if (path_n) {
SGPath config( globals->get_fg_root() );
config.append( path_n->getStringValue() );
- SG_LOG( SG_ALL, SG_ALERT, "Reading electrical system model from "
+ SG_LOG( SG_ALL, SG_INFO, "Reading electrical system model from "
<< config.str() );
try {
readProperties( config.str(), config_props );
<< config.str() );
}
- } else
- SG_LOG( SG_ALL, SG_ALERT,
+ } else {
+ SG_LOG( SG_ALL, SG_WARN,
"No electrical model specified for this model!");
+ }
delete config_props;
}
void FGElectricalSystem::update (double dt) {
if ( !enabled ) {
+ _amps_out->setDoubleValue(0);
return;
}
// zero everything out before we start
for ( i = 0; i < suppliers.size(); ++i ) {
- suppliers[i]->set_value( 0.0 );
+ suppliers[i]->set_volts( 0.0 );
+ suppliers[i]->set_load_amps( 0.0 );
}
for ( i = 0; i < buses.size(); ++i ) {
- buses[i]->set_value( 0.0 );
+ buses[i]->set_volts( 0.0 );
+ buses[i]->set_load_amps( 0.0 );
}
for ( i = 0; i < outputs.size(); ++i ) {
- outputs[i]->set_value( 0.0 );
+ outputs[i]->set_volts( 0.0 );
+ outputs[i]->set_load_amps( 0.0 );
}
for ( i = 0; i < connectors.size(); ++i ) {
- connectors[i]->set_value( 0.0 );
+ connectors[i]->set_volts( 0.0 );
+ connectors[i]->set_load_amps( 0.0 );
}
- // for each supplier, propogate the electrical current
+ // for each supplier, propagate the electrical current
for ( i = 0; i < suppliers.size(); ++i ) {
// cout << " Updating: " << suppliers[i]->get_name() << endl;
- propogate( suppliers[i], 0.0, " " );
+ propagate( suppliers[i], 0.0, " " );
}
+ double alt_norm
+ = fgGetDouble("/systems/electrical/suppliers/alternator") / 60.0;
+
+ // impliment an extremely simplistic voltage model (assumes
+ // certain naming conventions in electrical system config)
+ // FIXME: we probably want to be able to feed power from all
+ // engines if they are running and the master-alt is switched on
+ double volts = 0.0;
+ if ( fgGetBool("/controls/engines/engine[0]/master-bat") ) {
+ volts = 24.0;
+ }
+ if ( fgGetBool("/controls/engines/engine[0]/master-alt") ) {
+ if ( fgGetDouble("/engines/engine[0]/rpm") > 800 ) {
+ double alt_contrib = 28.0;
+ if ( alt_contrib > volts ) {
+ volts = alt_contrib;
+ }
+ } else if ( fgGetDouble("/engines/engine[0]/rpm") > 200 ) {
+ double alt_contrib = 20.0;
+ if ( alt_contrib > volts ) {
+ volts = alt_contrib;
+ }
+ }
+ }
+ _volts_out->setDoubleValue( volts );
+
+ // impliment an extremely simplistic amps model (assumes certain
+ // naming conventions in the electrical system config) ... FIXME:
+ // make this more generic
+ double amps = 0.0;
+ if ( fgGetBool("/controls/engines/engine[0]/master-bat") ) {
+ if ( fgGetBool("/controls/engines/engine[0]/master-alt") &&
+ fgGetDouble("/engines/engine[0]/rpm") > 800 )
+ {
+ amps += 40.0 * alt_norm;
+ }
+ amps -= 15.0; // normal load
+ if ( fgGetBool("/controls/switches/flashing-beacon") ) {
+ amps -= 7.5;
+ }
+ if ( fgGetBool("/controls/switches/nav-lights") ) {
+ amps -= 7.5;
+ }
+ if ( amps > 7.0 ) {
+ amps = 7.0;
+ }
+ }
+ _amps_out->setDoubleValue( amps );
}
}
-// propogate the electrical current through the network
-void FGElectricalSystem::propogate( FGElectricalComponent *node, double val,
+// propagate the electrical current through the network, returns the
+// total current drawn by the children of this node.
+float FGElectricalSystem::propagate( FGElectricalComponent *node, double val,
string s ) {
s += " ";
+
+ float current_amps = 0.0;
// determine the current to carry forward
- double current = 0.0;
+ double volts = 0.0;
if ( !fgGetBool("/systems/electrical/serviceable") ) {
- current = 0;
+ volts = 0;
} else if ( node->get_kind() == FG_SUPPLIER ) {
// cout << s << " is a supplier" << endl;
- current = ((FGElectricalSupplier *)node)->get_output();
+ volts = ((FGElectricalSupplier *)node)->get_output();
} else if ( node->get_kind() == FG_BUS ) {
// cout << s << " is a bus" << endl;
- current = val;
+ volts = val;
} else if ( node->get_kind() == FG_OUTPUT ) {
// cout << s << " is an output" << endl;
- current = val;
+ volts = val;
+ if ( volts > 1.0 ) {
+ // draw current if we have voltage
+ current_amps = ((FGElectricalOutput *)node)->get_output_amps();
+ }
} else if ( node->get_kind() == FG_CONNECTOR ) {
// cout << s << " is a connector" << endl;
if ( ((FGElectricalConnector *)node)->get_state() ) {
- current = val;
+ volts = val;
} else {
- current = 0.0;
+ volts = 0.0;
}
- // cout << s << " val = " << current << endl;
+ // cout << s << " val = " << volts << endl;
} else {
SG_LOG( SG_ALL, SG_ALERT, "unkown node type" );
}
- if ( current > node->get_value() ) {
- node->set_value( current );
+ if ( volts > node->get_volts() ) {
+ node->set_volts( volts );
}
int i;
// publish values to specified properties
for ( i = 0; i < node->get_num_props(); ++i ) {
- fgSetDouble( node->get_prop(i).c_str(), node->get_value() );
+ fgSetDouble( node->get_prop(i).c_str(), node->get_volts() );
}
// cout << s << node->get_name() << " -> " << node->get_value() << endl;
- // propogate to all children
+ // propagate to all children
for ( i = 0; i < node->get_num_outputs(); ++i ) {
- propogate( node->get_output(i), current, s );
+ current_amps += propagate( node->get_output(i), volts, s );
}
+
+ // if not an output node, register the downstream current draw
+ // with this node. If volts are zero, current draw should be zero.
+ if ( node->get_kind() != FG_OUTPUT ) {
+ node->set_load_amps( current_amps );
+ }
+ // cout << s << node->get_name() << " -> " << current_amps << endl;
+
+ return current_amps;
}
projects / flightgear.git / blobdiff