computing average rolling resistance

VectoCore/VectoCore/Models/SimulationComponent/Data/VehicleData.cs

@@ -89,6 +89,7 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Data
 		private KilogramSquareMeter _wheelsInertia;
 		private double? _totalRollResistanceCoefficient;
 		private double? _rollResistanceCoefficientWithoutTrailer;
+		private double? _averageRollingResistanceTruck;
 
 		public List<Axle> AxleData
 		{
@@ -191,6 +192,16 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Data
 			get { return (CurbWeight ?? 0.SI<Kilogram>()) + (BodyAndTrailerWeight ?? 0.SI<Kilogram>()); }
 		}
 
+		public double AverageRollingResistanceTruck
+		{
+			get {
+				if (_averageRollingResistanceTruck == null) {
+					ComputeRollResistanceAndReducedMassWheels();
+				}
+				return _averageRollingResistanceTruck.GetValueOrDefault();
+			}
+		}
+
 		protected void ComputeRollResistanceAndReducedMassWheels()
 		{
 			if (TotalVehicleWeight == 0.SI<Kilogram>()) {
@@ -204,7 +215,8 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Data
 
 			var rrc = 0.0.SI<Scalar>();
 			var rrcVehicle = 0.0.SI<Scalar>();
-
+			var averageRRC = 0.0;
+			var vehicleWheels = 0;
 			var wheelsInertia = 0.0.SI<KilogramSquareMeter>();
 			var vehicleWeightShare = 0.0;
 			foreach (var axle in _axleData) {
@@ -216,16 +228,18 @@ namespace TUGraz.VectoCore.Models.SimulationComponent.Data
 
 				var rrcShare = axle.AxleWeightShare * axle.RollResistanceCoefficient *
 								Math.Pow(baseValue, Physics.RollResistanceExponent - 1);
-
 				if (axle.AxleType != AxleType.Trailer) {
 					rrcVehicle += rrcShare;
 					vehicleWeightShare += axle.AxleWeightShare;
+					averageRRC += axle.RollResistanceCoefficient * nrWheels;
+					vehicleWheels += nrWheels;
 				}
 				rrc += rrcShare;
 				wheelsInertia += nrWheels * axle.Inertia;
 			}
 			RollResistanceCoefficientWithoutTrailer = rrcVehicle / vehicleWeightShare;
 			TotalRollResistanceCoefficient = rrc;
+			_averageRollingResistanceTruck = averageRRC / vehicleWheels;
 			WheelsInertia = wheelsInertia;
 		}
 

VectoCore/VectoCore/OutputData/XML/XMLCustomerReport.cs

@@ -89,7 +89,7 @@ namespace TUGraz.VectoCore.OutputData.XML
 				new XElement(tns + XMLNames.Report_GetGearbox_GearsCount, modelData.GearboxData.Gears.Count),
 				new XElement(tns + XMLNames.Report_Vehicle_Retarder, modelData.Retarder.Type.IsDedicatedComponent()),
 				new XElement(tns + XMLNames.Report_Vehicle_AxleRatio, modelData.AxleGearData.AxleGear.Ratio.ToXMLFormat(3)),
-				new XElement(tns + XMLNames.Report_Vehicle_AverageRRC, modelData.VehicleData.RollResistanceCoefficientWithoutTrailer)
+				new XElement(tns + XMLNames.Report_Vehicle_AverageRRC, modelData.VehicleData.AverageRollingResistanceTruck)
 				);
 			InputDataIntegrity = new XElement(tns + "InputDataSignature",
 				modelData.InputDataHash == null ? CreateDummySig() : new XElement(modelData.InputDataHash));