Week-3 Challenge: ADVISOR Tool

AIM:

1. To study the vehicle speed when EV_default_in file model is considered with cargo mass 500kg, FTP drive cycle while remaining all default values are kept same

ADVISOR TOOL: Advanced vehicle simulator

Today's advanced vehicles like hybrid vehicles efficiency developments have become crucial to engineers. In order to study and improve the life and performance of the vehicle components, optimize the vehicle designs, manage energy consumptions, engineers need to do simulations and component performance test activities. Advisor tool is used in MATLAB /SIMULINK environment, used to test effects of changes in the vehicle components such as motor, battery, converters, etc.

We need to select the EV_default_in file from the LOAD File drop-down list and change the cargo mass to 500Kg. By selecting the continue button, a new environment displays were to drive cycle CYC_FTP should be selected. keeping all other conditions the same, now click on the RUN button. The results show the drive cycle performance with parameters velocity and motor power.

From the above results, clearly shows the vehicle cannot travel for 45km as the results shown is 17.5km.

When the number of drive cycle is changed to 3, the plot shows the distance travelled by vehicle is approximately 45km.

2. To study the vehicle performance by changing the Battery Capacity

• Battery capacity_ESS_PB25:

The above picture shows how the energy is used by the vehicle at various conditions like to resist braking force, rolling force, auxiliary load, wheel axle ...The Battery energy capacity used is ESS_pd25 which has a mass of 275 kg. The battery mass(kg) of the Battery is required to overcome the drag force. If the battery mass required to provide energy is less, more battery power is consumed which is actually shown in the above graph. The entry utilized to overcome aerodynamic force is more than 1000KJ.

• Battery capacity_ESS_PB85:

Here the Battery capacity is changed to ESS_PB85 and the mass of the battery is 1145kg. Since the mass of the battery system is more than the previous battery capacity, less energy i.e., 2200kg is utilized to overcome aerodynamic force as per the graph shown. The efficiency of the system is 45% which proves that the battery capacity system should have enough mass to overcome forces acting on a vehicle so that less power is consumed.

• Battery capacity_ESS_PB91_ucd:

The battery capacity is changed to ESS_PB91_ucd while remaining all kept the same. The mass of the battery is 665kg which is shown enough to overcome the drag forces. The energy consumed is 1800kJ and the efficiency of the system is 38%. The above data shows more mass battery is required to overcome the forces acting on the vehicle so that less power consumption takes place.

Perform Gradeability test with PRIUS_Default _in drive cycle:

The above results showed that when the vehicle runs with PRIUS drive cycle on-road having a 5degree grade, will have gradeability 0.1% at 55mph in 10 seconds. The speed of the vehicle increases when the motor speed is more than 500rpm during this drive cycle.