From 16f0cd07128dfe85fb0b6b65bb4989c69ad18a8b Mon Sep 17 00:00:00 2001
From: Markus Quaritsch <markus.quaritsch@tugraz.at>
Date: Tue, 13 Oct 2015 10:31:59 +0200
Subject: [PATCH] - introduce new exception in case searching for an operating
point gives no result - open the clutch if the vehicle's speed gets too low
and the engine speed goes below idle speed
---
VectoCore/Configuration/Constants.cs | 2 ++
.../Models/Connector/Ports/Impl/Response.cs | 2 ++
.../Models/SimulationComponent/Impl/Driver.cs | 34 ++++++++++++++-----
.../SimulationComponent/Impl/Gearbox.cs | 7 ++++
4 files changed, 37 insertions(+), 8 deletions(-)
diff --git a/VectoCore/Configuration/Constants.cs b/VectoCore/Configuration/Constants.cs
index 525928ee18..e8f102d701 100644
--- a/VectoCore/Configuration/Constants.cs
+++ b/VectoCore/Configuration/Constants.cs
@@ -86,6 +86,8 @@ namespace TUGraz.VectoCore.Configuration
public static readonly PerSecond EngineIdlingSearchInterval = 10.SI<PerSecond>();
public const int EngineSearchLoopThreshold = 100;
+
+ public static readonly MeterPerSecond VehicleStopClutchDisengageSpeed = 10.KMPHtoMeterPerSecond();
}
}
}
\ No newline at end of file
diff --git a/VectoCore/Models/Connector/Ports/Impl/Response.cs b/VectoCore/Models/Connector/Ports/Impl/Response.cs
index 61b70770f5..f7bd2afe1e 100644
--- a/VectoCore/Models/Connector/Ports/Impl/Response.cs
+++ b/VectoCore/Models/Connector/Ports/Impl/Response.cs
@@ -87,4 +87,6 @@ namespace TUGraz.VectoCore.Models.Connector.Ports.Impl
}
internal class ResponseGearShift : AbstractResponse {}
+
+ internal class ResponseEngineSpeedTooLow : ResponseDryRun {}
}
\ No newline at end of file
diff --git a/VectoCore/Models/SimulationComponent/Impl/Driver.cs b/VectoCore/Models/SimulationComponent/Impl/Driver.cs
index bf7e41b585..8573b2cc9e 100644
--- a/VectoCore/Models/SimulationComponent/Impl/Driver.cs
+++ b/VectoCore/Models/SimulationComponent/Impl/Driver.cs
@@ -148,8 +148,15 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
});
if (retVal == null) {
- // unhandled response (overload, delta > 0) - we need to search for a valid operating point..
- var nextOperatingPoint = SearchOperatingPoint(absTime, ds, gradient, operatingPoint.Acceleration, response);
+ // unhandled response (overload, delta > 0) - we need to search for a valid operating point..
+
+ OperatingPoint nextOperatingPoint;
+ try {
+ nextOperatingPoint = SearchOperatingPoint(absTime, ds, gradient, operatingPoint.Acceleration, response);
+ } catch (VectoSimulationException) {
+ // in case of an exception during search the engine-speed got too low - gear disengaged, try roll action.
+ nextOperatingPoint = SearchOperatingPoint(absTime, ds, gradient, operatingPoint.Acceleration, response);
+ }
var limitedOperatingPoint = LimitAccelerationByDriverModel(nextOperatingPoint,
LimitationMode.LimitDecelerationDriver);
@@ -255,9 +262,14 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
// return response;
//}
- operatingPoint = SearchOperatingPoint(absTime, operatingPoint.SimulationDistance, gradient,
- operatingPoint.Acceleration, response, coasting: true);
-
+ try {
+ operatingPoint = SearchOperatingPoint(absTime, operatingPoint.SimulationDistance, gradient,
+ operatingPoint.Acceleration, response, coasting: true);
+ } catch (VectoSimulationException) {
+ // in case of an exception during search the engine-speed got too low - gear disengaged, try roll action.
+ operatingPoint = SearchOperatingPoint(absTime, operatingPoint.SimulationDistance, gradient,
+ operatingPoint.Acceleration, response, coasting: true);
+ }
if (!ds.IsEqual(operatingPoint.SimulationDistance)) {
// vehicle is at low speed, coasting would lead to stop before ds is reached.
Log.Debug("SearchOperatingPoint reduced the max. distance: {0} -> {1}. Issue new request from driving cycle!",
@@ -488,7 +500,7 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
var response =
(ResponseDryRun)
NextComponent.Request(absTime, operatingPoint.SimulationInterval, operatingPoint.Acceleration, gradient, true);
- var delta = DataBus.ClutchClosed(absTime) ? response.DeltaDragLoad : response.GearboxPowerRequest;
+ var delta = DataBus.ClutchClosed(absTime) ? response.DeltaDragLoad : response.GearboxPowerRequest;
if (delta.IsEqual(0.SI<Watt>(), Constants.SimulationSettings.EnginePowerSearchTolerance)) {
LogManager.EnableLogging();
@@ -516,7 +528,7 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
Log.Warn("Exceeded max iterations when searching for operating point!");
Log.Warn("exceeded: {0} ... {1}", ", ".Join(debug.Take(5)), ", ".Join(debug.Slice(-6)));
Log.Error("Failed to find operating point for breaking!");
- throw new VectoSimulationException("Failed to find operating point for breaking!exceeded: {0} ... {1}",
+ throw new VectoSearchFailedException("Failed to find operating point for breaking!exceeded: {0} ... {1}",
", ".Join(debug.Take(5)), ", ".Join(debug.Slice(-6)));
}
@@ -607,6 +619,12 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
(ResponseDryRun)NextComponent.Request(absTime, retVal.SimulationInterval, retVal.Acceleration, gradient, true);
delta = actionRoll ? response.GearboxPowerRequest : (coasting ? response.DeltaDragLoad : response.DeltaFullLoad);
+ if (response is ResponseEngineSpeedTooLow) {
+ LogManager.EnableLogging();
+ Log.Debug("Got EngineSpeedTooLow during SearchOperatingPoint. Aborting!");
+ throw new VectoSimulationException("EngineSpeed too low during search.");
+ }
+
if (delta.IsEqual(0.SI<Watt>(), Constants.SimulationSettings.EnginePowerSearchTolerance)) {
LogManager.EnableLogging();
Log.Debug("found operating point in {0} iterations. Engine Power req: {2}, Gearbox Power req: {3} delta: {1}",
@@ -622,7 +640,7 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
Log.Warn("exceeded: {0} ... {1}", ", ".Join(debug.Take(5).Select(x => x.delta)),
", ".Join(debug.Slice(-6).Select(x => x.delta)));
Log.Error("Failed to find operating point! absTime: {0}", absTime);
- throw new VectoSimulationException("Failed to find operating point! exceeded: {0} ... {1}",
+ throw new VectoSearchFailedException("Failed to find operating point! exceeded: {0} ... {1}",
", ".Join(debug.Take(5).Select(x => x.delta)),
", ".Join(debug.Slice(-6).Select(x => x.delta)));
}
diff --git a/VectoCore/Models/SimulationComponent/Impl/Gearbox.cs b/VectoCore/Models/SimulationComponent/Impl/Gearbox.cs
index eedbdaeda2..2dafcc1493 100644
--- a/VectoCore/Models/SimulationComponent/Impl/Gearbox.cs
+++ b/VectoCore/Models/SimulationComponent/Impl/Gearbox.cs
@@ -293,6 +293,13 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Impl
}
if (dryRun) {
+ if (inEngineSpeed < DataBus.EngineIdleSpeed && DataBus.VehicleSpeed < Constants.SimulationSettings.VehicleStopClutchDisengageSpeed) {
+ _disengaged = true;
+ _shiftTime = absTime + dt;
+ _strategy.Disengage(absTime, dt, outTorque, outAngularVelocity);
+ Log.Debug("EngineSpeed is below IdleSpeed, Gearbox disengage!");
+ return new ResponseEngineSpeedTooLow() { Source = this, GearboxPowerRequest = outTorque * outAngularVelocity };
+ }
var dryRunResponse = NextComponent.Request(absTime, dt, inTorque, inEngineSpeed, true);
dryRunResponse.GearboxPowerRequest = outTorque * outAngularVelocity;
return dryRunResponse;
--
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