Week-4 Challenge WOT Condition Part-2
QUS.01
*.Mapped Model-
1. The mapped model is one type where the data points are pre_assigned in lookup tables.
2.The engine or motor torque required is sensed and the motor or engine block generates the requiered torque output just as required simply without considering the real time motor or engine, parameters.
3.The output values are stored for the corrresponding given input values of the engine motor and generator.
4.The accuracy of this type is not that high but the simulation will be done in much less time as it does not run by real time parameter.
#Dyanamic Model:
1. The dyanamic model in other hand uses the combination of the outputs from various subsystems to generate the output.
2. It runs by real time simulation where the required input from the drive cycle is taken and for that individiual real time simulation gets performed and summing all the results of the subsystem gives the output for the simulation.
3. As per the drive cycle requirements the initial Bus voltage ,current is given along with the vehicle feedback so that it runs the actual simulation at that particuclar moment throught the drive cycle.
4. The accuracy of this model is very high as it considers the real outputs from all the subsystem to generate the output.
5. The simulation will take very long time to complete as it has so many individual simulations running by all the subsystem of the engine , motor/generator.
Steps to select the Model Type:
1. In the powertrain blockset module we first need to select the vehicle type first wheather it is full electric , full engine or the type of hybrid vehicle.
2. After that the Simulink model appears by showing the work flow blocks of the model.
3. In that we need to go to Passenger Block Electric plant* EV Motor/Generator block.
4. After this just right click and go to Variance Label mode Active choice MotorGenEV Mapped or Dyanamic.
To change the model type
At first the type of vehicle is selected then, run the reference application using the command window in Matlab.
In the simulink window, open the electric plant block which will be inside the passenger car block.
If the selected type is pure electric vehicle then, right click the MotGenEvMapped block.
Choose, Variant-->Label mode active choice --> MotGenEvMapped/MotGenEvDynamic
If the selected type is hybrid electric vehicle then, the model of motor and generator can be changed seperately
To change the model type of the generator, right click on the generator block then
choose, Variant --> Label mode active choice --> GenDynamic / GenMapped
To change the model type of the motor, right click on the motor block then
choose, Variant --> Label mode active choice --> MotDynamic / MotMapped
QUS.2-
Miles per gallon.
1. Miles per Gallon is a fuel economy rating determined by how far a car can travel on a gallon of petrol or Diesel for a Engine powered car.
2.In case of an electric vehicle it tells us the energy which is equivalent that of a engine powered carto propel the car through a distance.
3.The amount of Fuel Energy required to move a engine powered car through a distance is determined and then it is compared to the eqivalent amount of electric energy required to move the car throgh the same distance and is expressed as the miles per gallon.
The Vehicle speed is a important factor while considering the fuel consumption at that particular time,so to determine the fuel consumption throughout the drive cycle.To convert speed to Distance we can Integrate with time and we are doing the same of converting the velocity to get distance covered by integrating.Then the Fuel flow is expressed as the mass flow rate (i.e) the amount of fuel at each moment in Kg/Sec. Now integrating this will result in the mass of the fuel and by using this 1 we convert it to the volume and by multiply by 1000 to get it in Litres.By comparing the two results we can get the amount of litre consumed to Run for 100km.
For pure electric vehicle -The factors which are considered to calculate the mile per gallon value of a pure electric vehicle are vehicle speed and battery power.
The vehicle speed is integrated to get the value of distance covered in meters. This value is then converted to mile and kilometre.
The battery power in watt is converted into m^3 per gal, which is then integrated and converted into US Gallon and Litre.
The US Gal value is used to divide the distance covered in mile to get the US MPG (miles per gallon) value of the vehicle.
The Litre value is used to divide the distance covered in km to get the L/100 km value of the vehicle
For hybrid electric vehicle -The vehicle speed, fuel flow and battery power are the factors which are involved in calculating the miles per gallon value of the vehicle.
The vehicle speed is integrated to get the value of distance covered in meters. This value is then converted to mile and kilometre.
The battery power in watt is converted into m^3 per gal, which is then summed with fuel flow and then integrated. This integrated value is converted into US Gallon and Litre.
The US Gal value is used to divide the distance covered in mile to get the US MPG (miles per gallon) value of the vehicle.
The Litre value is used to divide the distance covered in km to get the L/100 km value of the vehicle.
question 3 and 4 cant be able to complete due to matlab licence was expired.