From 372fd5ef0f2bee10399396a43f1c20d02b9e18a9 Mon Sep 17 00:00:00 2001
From: Markus Quaritsch <markus.quaritsch@tugraz.at>
Date: Wed, 21 Dec 2016 17:07:48 +0100
Subject: [PATCH] fix: computation of slope for changing engine speed during
traction interruption
---
.../SimulationComponent/Impl/CombustionEngine.cs | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)
diff --git a/VectoCore/VectoCore/Models/SimulationComponent/Impl/CombustionEngine.cs b/VectoCore/VectoCore/Models/SimulationComponent/Impl/CombustionEngine.cs
index ccd4adf437..002aa023c7 100644
--- a/VectoCore/VectoCore/Models/SimulationComponent/Impl/CombustionEngine.cs
+++ b/VectoCore/VectoCore/Models/SimulationComponent/Impl/CombustionEngine.cs
@@ -444,7 +444,7 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
var tStar = tStarPrev + PreviousState.dt;
dynFullPowerCalculated = stationaryFullLoadPower * (1 - Math.Exp((-tStar / pt1).Value()));
dynFullPowerCalculated = VectoMath.Max(PreviousState.EnginePower, dynFullPowerCalculated);
- } catch (Exception ) {
+ } catch (Exception) {
Log.Error("failed to calculate dynamic full-load power - using stationary idle full-load. n: {0}", angularVelocity);
}
}
@@ -500,6 +500,7 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
private Second _idleStart;
private Watt _lastEnginePower;
+ private PerSecond _engineTargetSpeed;
public ITnOutPort RequestPort { private get; set; }
@@ -539,11 +540,16 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
if (!outTorque.IsEqual(0)) {
throw new VectoException("Torque has to be 0 for idle requests!");
}
- var targetVelocity = _engine.PreviousState.EngineSpeed / _dataBus.GetGearData(_dataBus.Gear).Ratio *
+ if (_idleStart == null) {
+ _idleStart = absTime;
+ _engineTargetSpeed = _engine.PreviousState.EngineSpeed / _dataBus.GetGearData(_dataBus.Gear).Ratio *
_dataBus.GetGearData(_dataBus.NextGear.Gear).Ratio;
- var velocitySlope = (targetVelocity - _engine.PreviousState.EngineSpeed) / _dataBus.TractionInterruption;
+ }
+
+
+ var velocitySlope = (_engineTargetSpeed - _engine.PreviousState.EngineSpeed) / (_dataBus.TractionInterruption - (absTime - _idleStart));
- var nextAngularSpeed = (velocitySlope * dt + _engine.PreviousState.EngineSpeed);
+ var nextAngularSpeed = (velocitySlope * dt + _engine.PreviousState.EngineSpeed);
if (nextAngularSpeed < _engine.ModelData.IdleSpeed) {
nextAngularSpeed = _engine.ModelData.IdleSpeed;
}
--
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