getOutgoingCurrentTerms: function(node) {
var batteries = this.batteries;
var resistors = this.resistors;
var nodeTerms = [];
var i;
for (i = 0; i < batteries.length; i++) {
if (batteries[i].node0 === node)
nodeTerms.push(Term.createWithOwner(this, 1, UnknownCurrent.createWithOwner(this, batteries[i])));
}
for (i = 0; i < resistors.length; i++) {
// Treat resistors with R=0 as having unknown current and v1=v2
if (resistors[i].node0 === node && resistors[i].resistance === 0)
nodeTerms.push(Term.createWithOwner(this, 1, UnknownCurrent.createWithOwner(this, resistors[i])));
}
for (i = 0; i < resistors.length; i++) {
if (resistors[i].node0 === node && resistors[i].resistance !== 0) {
nodeTerms.push(Term.createWithOwner(this, -1 / resistors[i].resistance, UnknownVoltage.createWithOwner(this, resistors[i].node1)));
nodeTerms.push(Term.createWithOwner(this, 1 / resistors[i].resistance, UnknownVoltage.createWithOwner(this, resistors[i].node0)));
}
}
return nodeTerms;
},
getEquations: function() {
var list = [];
var i;
var referenceNodes = this.getReferenceNodes();
var nodeSet = this.getNodeSet();
var batteries = this.batteries;
var resistors = this.resistors;
// Reference node in each connected component has a voltage of 0
for (i = 0; i < referenceNodes.length; i++)
list.push(Equation.createWithOwner(this, 0, Term.createWithOwner(this, 1, UnknownVoltage.createWithOwner(this, referenceNodes[i]))));
// For each node, charge is conserved
for (i = 0; i < nodeSet.length; i++)
list.push(Equation.createWithOwner(this, this.getRHS(nodeSet[i]), this.getCurrentConservationTerms(nodeSet[i])));
// For each battery, voltage drop is given
for (i = 0; i < batteries.length; i++) {
list.push(
Equation.createWithOwner(
this,
batteries[i].voltage,
[
Term.createWithOwner(this, -1, UnknownVoltage.createWithOwner(this, batteries[i].node0)),
Term.createWithOwner(this, 1, UnknownVoltage.createWithOwner(this, batteries[i].node1))
]
)
);
}
// If resistor has no resistance, node0 and node1 should have same voltage
for (i = 0; i < resistors.length; i++) {
if (resistors[i].resistance === 0) {
list.push(
Equation.createWithOwner(
this,
0,
[
Term.createWithOwner(this, 1, UnknownVoltage.createWithOwner(this, resistors[i].node0)),
Term.createWithOwner(this, -1, UnknownVoltage.createWithOwner(this, resistors[i].node1))
]
)
);
}
}
return list;
},
getUnknownVoltages: function() {
if (!this.unknownVoltages) {
var nodeSet = this.getNodeSet();
var v = [];
for (var i = 0; i < nodeSet.length; i++)
v.push(UnknownVoltage.createWithOwner(this, nodeSet[i]));
this.unknownVoltages = v;
}
return this.unknownVoltages;
},