void Start()
{
helicopter = GetComponent <Helicopter>();
if (helicopter != null)
{
model = helicopter.model;
}
}
public void LogTrimState(Helicopter model)
{
Console.WriteLine(" col " + Math.Round(model.Collective * 100)
+ " lon " + Math.Round(model.LongCyclic * 100)
+ " lat " + Math.Round(model.LatCyclic * 100)
+ " ped " + Math.Round(model.Pedal * 100)
+ " roll " + (model.RollAngle * 180 / Math.PI).ToStr()
+ " pitch " + (model.PitchAngle * 180 / Math.PI).ToStr());
}
public RigidBody SetupRigidBody()
{
Helicopter model = SetupModelForSimulation();
RigidBody body = new RigidBody
{
ForceModel = model,
Mass = model.Mass,
Inertia = model.Inertia
};
return(body);
}
public void ForwardCyclic_Response()
{
RigidBody body = SetupRigidBody();
Helicopter model = (Helicopter)body.ForceModel;
var trimPosition = model.Translation;
var trimPitchAngle = model.PitchAngle;
model.LongCyclic = 1.0;
Simulate(body, 1.0);
LogSimulationState(body);
Assert.IsTrue(model.PitchAngle < trimPitchAngle);
Assert.IsTrue(model.Translation.x() > trimPosition.x());
}
public void LeftCyclic_Response()
{
RigidBody body = SetupRigidBody();
Helicopter model = (Helicopter)body.ForceModel;
var trimPosition = model.Translation;
var trimRollAngle = model.RollAngle;
model.LatCyclic = -1.0;
Simulate(body, 0.1);
LogSimulationState(body);
Assert.IsTrue(model.RollAngle < trimRollAngle);
Assert.IsTrue(model.Translation.y() < trimPosition.y());
}
public void AssertTrimmed(Helicopter model)
{
// Forces and moments should be near-zero
Assert.IsTrue(model.Force.Norm(2) < 0.1);
Assert.IsTrue(model.Torque.Norm(2) < 0.1);
// Controls should be reasonable
Assert.IsTrue(Math.Abs(model.Collective) < 0.5);
Assert.IsTrue(Math.Abs(model.LongCyclic) < 0.5);
Assert.IsTrue(Math.Abs(model.LatCyclic) < 0.5);
Assert.IsTrue(Math.Abs(model.Pedal) < 0.5);
// Attitude should be reasonable
Assert.IsTrue(Math.Abs(model.RollAngle) < 10 * Math.PI / 180);
Assert.IsTrue(Math.Abs(model.PitchAngle) < 10 * Math.PI / 180);
}
public void DownCollective_Response()
{
RigidBody body = SetupRigidBody();
Helicopter model = (Helicopter)body.ForceModel;
var trimPosition = model.Translation;
model.Collective = -1.0;
Simulate(body, 1.0);
LogSimulationState(body);
Assert.IsTrue(model.Translation.z() > trimPosition.z());
double horizontalDistanceMoved = (model.Translation.SubVector(0, 2) - trimPosition.SubVector(0, 2)).Norm(2);
Assert.IsTrue(horizontalDistanceMoved < 1.0);
}
public void LeftPedal_Response()
{
RigidBody body = SetupRigidBody();
Helicopter model = (Helicopter)body.ForceModel;
var trimPosition = model.Translation;
var trimHeading = model.Heading;
model.Pedal = -1.0;
Simulate(body, 1.0);
LogSimulationState(body);
Assert.IsTrue(model.Heading < trimHeading);
double distanceMoved = (model.Translation - trimPosition).Norm(2);
Assert.IsTrue(distanceMoved < 3.0);
}
public void TrimSweep(Helicopter model, double ustart = -20, double uend = 60, double ustep = 1, double v = 0, double w = 0, double h = 1000)
{
model.Height = h;
for (var u = ustart; u <= uend + ustep / 2; u += ustep)
{
Console.WriteLine("Trimming u " + u.ToStr() + " m/s");
model.AbsoluteVelocity = Vector <double> .Build.DenseOfArray(new double[] { u, v, w });
model.AngularVelocity = Vector <double> .Build.Zero3();
try {
model.TrimInit();
model.Trim();
LogTrimState(model);
AssertTrimmed(model);
} catch (TrimmerException e) {
Console.WriteLine(" Failed: " + e.Message);
}
}
}