SequenceOfManeuvers 4.1
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Révision de 18 décembre 2018 à 10:24 par Admin (discussion | contributions) (Page créée avec « <syntaxhighlight lang="java"> public class SequenceOfManeuvers { public static void main(String[] args) throws PatriusException { // Patrius Dataset... »)
public class SequenceOfManeuvers { public static void main(String[] args) throws PatriusException { // Patrius Dataset initialization (needed for example to get the UTC time) PatriusDataset.addResourcesFromPatriusDataset() ; // Recovery of the UTC time scale using a "factory" (not to duplicate such unique object) final TimeScale TUC = TimeScalesFactory.getUTC(); // Creating a mass model with a main part and with a tank final AssemblyBuilder builder = new AssemblyBuilder(); // Main part (dry mass) final double dryMass = 1000.; builder.addMainPart("MAIN"); builder.addProperty(new MassProperty(dryMass), "MAIN"); // Tank part (ergols mass) final double ergolsMass = 100.; final TankProperty tank = new TankProperty(ergolsMass); builder.addPart("TANK", "MAIN", Transform.IDENTITY); builder.addProperty(tank, "TANK"); // Engine part final double isp = 300.; final double thrust = 400.; final PropulsiveProperty prop = new PropulsiveProperty(thrust, isp); builder.addPart("PROP", "MAIN", Transform.IDENTITY); builder.addProperty(prop, "PROP"); final Assembly assembly = builder.returnAssembly(); final MassProvider mm = new MassModel(assembly); // SPECIFIC IMPULSIVE MANEUVER // Event corresponding to the criteria to trigger the impulsive maneuver // (when the S/C is at the apogee) final EventDetector event = new AnomalyDetector(PositionAngle.TRUE, FastMath.PI); // Creation of the impulsive maneuver (20 m/s int the x vehicle direction) final Vector3D deltaV = new Vector3D(20., 0., 0.); final ImpulseManeuver imp = new ImpulseManeuver(event, deltaV, prop, mm, tank, LOFType.TNW); // SPECIFIC CONTINUOUS MANEUVER // Duration of the continuous maneuver to get a 20 m/s boost final AbsoluteDate startDate = new AbsoluteDate("2010-01-01T12:00:00.000", TUC); final double G0 = 9.80665; final double duration = G0*isp*mm.getTotalMass()*(1. - FastMath.exp(-20/(G0*isp)))/thrust; // Direction of the thrust in the X vehicle axis final Vector3D direction = new Vector3D(1., 0., 0.); // Creation of the continuous thrust maneuver final ContinuousThrustManeuver man = new ContinuousThrustManeuver(startDate, duration, prop, direction, mm, tank, LOFType.TNW); // SPECIFIC SEQUENCE OF MANEUVERS ManeuversSequence seq = new ManeuversSequence(10., 10.); seq.add(imp); seq.add(man); System.out.println("Amount of maneuvers: "+seq.getSize()); } }