Team O
Chenxi Dai, Chris Herrel, Guolingzi Yang, Shiqi Zhang
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Chenxi Dai (.264)
Major: Electrical Engineering
Year: 2nd
Chris Herrel (.17)
Major: International Relations and Diplomacy
Year: 3rd
Guolingzi Yang (.3199)
Major: Chemical Engineering
Year: 1st
Shiqi Zhang (.6372)
Major: Computer Science and Engineering
Year: 2nd
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Mission Concept Review
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AEV Design Process
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AEV Final Design
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AEV Coding and Improvement
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Final Run
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Conclusion
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Start
Wait 7 seconds at gate
Pick up R2-D2, wait 5 seconds
Back to the gate, 7 more seconds
Drop-off area
Goals:
◦ Lowest energy consumption
◦ Complete in less than 2.5 min
With pull-push system
With good balance and
stability
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To provide better definition of concepts
Help define the final project
According to the matrix for four original designs:
 The first design: minimal blockage
 The total score for the first design is 3, which is higher than
standard design by 0.25.
 The others: 2.75, 2.85
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The Wheel with tapes and the sensors
The sensors work with two functions:
goToRelativePosition(m);
goToAbsolutePosition(c);
These two functions play the main roles in final code.
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About the relationship between efficiency and propellers
configurations
Propulsion Efficiency vs Advance Ratio
Decision: 3030 Puller
◦ Deep blue line
(good tendency)
◦ At the same ratio with
higher efficiency
16.000
14.000
Propulsion Efficiency(%)
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12.000
10.000
2510 Pusher
8.000
2510 Puller
6.000
3030 Puller
4.000
3030 Puller
2.000
0.000
0.000
0.200
0.400
0.600
0.800
Advance Ratio(unitless)
1.000
1.200
1.400
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Original Design
ITEM
PART NUMBER
DESC QTY.
NO.
Support
Arm
2
2
Sensor
1 Holes
1
2 Medium Rectangle
1
0.1123 SL-PHMS
2
40x0.5x0.5-S
4 MSHXNUT 0.112-40-S-S
7
5 AEV Arduino Assembly
1
6 Tee
1
7 90-deg bracket
3
SL-PHMS
0.1128 40x0.375x0.375-S
4
9 Motor Mount Clip
2
10 AEV Motor
2
11 Prop 1
2
Pack Clamp
12 Battery
1
Plate Narrow
13 Battery Spacer
2
14 SL-PHMS 0.112-40x1x1-S
3
0.11215 SL-PHMS
5
40x0.375x0.375-S
16 MSHXNUT 0.112-40-S-S
8
Ball
Retainer
Inner
17 Sleeve
2
Ball
Retainer
Outer
18 Sleeve
2
19 Ball
48
w-reflective
20 Housing
1
tape
6.070
8.203
21 Housing
0.312522 HBOLT
18x0.875x0.875-S
23 MSHXNUT 0.3125-18-S-S
24 Rotation Sensor Board
25 Battery Sleeve
26 Battery
27 Kapton Tape
5.569
The Ohio State University
First Year Engineering
Dwg. Title: Alternate AEV Design
Drawn By: Chris Herrel
Scale: 11:24
Inst.: Schrock
Hour: 150
1
2
2
2
1
2
1
Units: Inches Dwg. No.: XX
Date: 3/25/2016
Seat: 58
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Final Design
ITEM
NO.
1
2
3
4
5
7.906
2.570
5.000
The Ohio State University
First Year Engineering
Dwg. Title: Current AEV Design
Drawn By: Chris Herrel
Scale: 11:24
PART NUMBER
DESCRIPTION QTY.
Support Arm 2 2
1
Sensor Holes
Medium Rectangle
1
SL-PHMS 0.1124
40x0.5x0.5-S
MSHXNUT 0.112-40-S-S
9
AEV Arduino
1
Assembly
6 Battery Spacer
2
SL-PHMS
0.112-40x1x17 S
3
Battery
Pack
Clamp
8 Plate Narrow
1
9 Battery Sleeve
1
10 Battery
2
11 Kapton Tape
1
Ball
Retainer
Inner
12 Sleeve
2
Ball
Retainer
Outer
13 Sleeve
2
14 Ball
48
w-reflective
15 Housing
1
tape
16 Housing
1
HBOLT
0.312517 18x0.875x0.875-S
2
18 Rotation Sensor Board
2
MSHXNUT
0.3125-18-S19 S
2
20 Motor Mount Clip
1
21 flat bracket
2
22 45-deg bracket
1
23 90-deg bracket
1
SL-PHMS
0.11224 40x0.375x0.375-S
3
25 AEV Motor
1
26 Prop 1
1
Units: Inches Dwg. No.: XX
Inst.: Schrock
Date: 3/25/2016
Seat: 58
Hour: 150
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Cost:
Original: $159.46
Final:
$142.07
Weight:
Original: 250 Grams
Final:
210 Grams
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Considering about the screening and scoring matrix:
◦ The Original One: 3.0
◦ The Final One: 3.75
- Better efficiency from the graph (less time and less energy cost)
◦ Less cost
◦ Easier to maintain with less parts
- Only one motor, one board
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The MATLAB-generated Plot: Power vs Time
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Main algorithm to complete
◦ Distance-based code
◦ goToAbsolutePosition
◦ goToRelativePosition
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Three ways
◦ Reduce the using of reverse
◦ Replace motorSpeed(4,0) to brake
◦ Speed up slowly
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The AEV test final score: 46/50
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Obstacles
◦ Failed to stop before the second sensor
◦ Not be able to park in the drop area, bounce back
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Time: 73 Seconds
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Distance: 24.48 Meters
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Energy Consumption: 217.33 Joules
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Energy/Mass: 1025.16 J/kg
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The team, the well-design AEV
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Finish the most of the mission
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Good team work, project management, design process, and
project documentation
QUESTIONS?
Thank you!