Week-3 Challenge: ADVISOR Tool

AIM: A model written in the widely used MATLAB/Simulink software environment. This is a tool stands for 'Advanced Vehicle Simulator' which is used to model different types of vehicles such as some IC engine based and electric vehicles, Hybrid vehicles and Fuel cell-based vehicles, this tool is very useful in case of user-defined powertrain or vehicle dynamics and wonts to see the following results before the implementation of the model.

The benefit of using ADVISOR:

• Estimate the fuel economy of vehicles that have not yet been built.
• Learn about how conventional, hybrid or electric vehicles use (and lose) energy throughout their drivetrains.
• Compare relative tailpipe emissions produced on a number of cycles.
• Evaluate an energy management strategy for your hybrid vehicle's fuel converter.
• Optimize the gear ratios in your transmission to minimize fuel use or maximize performance, etc.

How To start ADVISOR Tool:

• Launch MATLAB and first set default location folder to the advisor.
• Now in the command window of MATLAB type "advisor" and press enter.
• A new window will open and then set "metric" for unit and start ADVISOR.
• It will launch in a new window.

Advisor tools have 3 windows:

1. Vehicle Input window.
2. Simulation Parameter window.
3. Results window.

1)For EV_defaults_in file, if cargo moss is 500 kg with all other default conditions, con the vehicle travel for 45 km with FTP drive cycle? Conclude your observation.

- Load the ADV ISOR TOOL from the Matlab command window and select metric system, and load EV_default_in file and change the cargo weight to 500 and keeping the remaining variables same and hit continue to load the drive cycle page.

• In Simulation Parameter window change drive cycle to CYC_FTP by selecting the drop- down menu.
• Below that we will see # of cycles from here we can set our drive cycle.

AS we can see an error occur as the EV ran out of battery for this type of drive cycle.

As we need total distance covered to be 45 kilometers and this drive cycle can only complete 17.8 so we need more than 1 drive cycle to complete more than 45 kilometers. So we can use 3 drive cycles.

As we can see a warning sign pops up which means that the distance is more than the range of the current battery pack so the vehicle can not travel 45 kilometers but will be short by 3.2 kilometers.

2)In the above case, try changing the battery capacity and repeat the simulation. The current battery capacity is kept or 25 we need to increase the battery pack capacity so that the vehicle can run more than 45 kms.

So for this we will increase the battery capacity from 25 to 45.

Increasing the battery capacity we can see that the range has been increased to 53.3 km which is more than the required range we need.

3)Perform gradeability test with PRIUS_JPN_defaults_in file.

Select 'Prius_JPN_default_in' file from the load file option to load the Prius model.

Hit continue and select the Grade options to open the Grade Test options in this we need to change the option which will include both fuel and energy storage system, hence we will select all systems to enable and in basic parameters the speed of the vehicle can be controlled we need to change the speed from 5-35 mph with an increment of 5 mph to check the gradeability at different speeds.

After running the Prius model with different speeds we can check the gradeability percentage, we need to take the values at different speeds and tabulate the information.

SPEED (MPH) GRADEABILITY

05 32.8

10 30.2

15 24.4

20 19.8

25 16.5

30 14.7

35 13

From the above table, we con see that the gradeability decreases with increase in speed the maximum gradeability during 5 mph and lowest during 35 mph