Download Lab 5 AEV System Analysis 1

Advanced Energy Vehicle (AEV)
Lab 05: AEV System Analysis 1
AEV Project Objective
(Problem Definition)
INITIAL CONCEPTS
(Brainstorming)
EXPERIMENTAL RESEARCH
(Programming)
(System Analysis)
ANALYZE
COMPARE
PT 1
PT 2
PT 3
PT 4
RESEARCH
FINAL DESIGN
Present AEV Design
DESIGN
DECISION
Learning Objectives
 Download data from the automatic control
system
 Convert EEProm Arduino data readouts to
physical engineering parameters
 Calculate the supplied power to the AEV
 Calculate the supplied incremental and total
energy to the AEV
AEV Data Recorder
 MATLAB Program developed at OSU
 Zip file is found in
AEV Documents
 Takes the EEProm
data and puts it in
an Excel
spreadsheet
AEV Data Recorder
 Use the new zipped version of “AEV
Data Recorder” under the “AEV
Documents” page
 Need to extract the zipped folder by
using “Extract Here”
 Good location to “Extract Here” would
be the sketchbook (one central location
for all AEV material)
AEV Data Recorder
Verify that the
Arduino is
plugged into the
computer and
TURNED ON
Click on Run
Type in a name
for the Excel File
Let MATLAB
establish a
connection to the
Arduino
Once complete,
open the Excel file
Example of Excel Spreadsheet Created by
MatLab AEV Data Recorder
(m)
Wheel counts are not used in Lab 5
AEV Data Conversion
 Convert the EEProm into physical parameters of:
• Time (seconds)
• Current (amps)
• Voltage (volts)
 Analyze the data by calculating:
• Power (watts)
• Incremental Energy (joules)
• Total Energy (joules)
Time, Current, Voltage, & Power
 Time:
t  t E / 1000
 Current:
 IE 
 1 Amp 
I 
 * VR * 

1024
0
.
185
Volts




 Voltage:
V 
 Power:
Pin  V  I
15 * VE
1024
t = time (seconds)
tE = EEProm time (milliseconds)
I = current (amps)
IE = EEProm equivalent current
VR = Arduino reference voltage
V = Voltage (volts)
VE = EEProm equivalent voltage
Pin = Power in (watts)
V = Voltage (volts)
I = Current (amps)
Energy
 Remember that Energy is the area under the power versus
time curve.
 A rectangle approximation of the power and time will be used
to calculate the incremental and total energy.
 There are 3
approximation
methods:
Energy
 The midpoint method will be used to calculate the energy.
 The midpoint method uses the averaged power of 2
neighboring points and multiplied by the time increment:
P1in  P2in
E1 
 t 2  t1 
2
 Sum up the incremental energy for the total value used
throughout the operation
Questions?