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Fall 2020 Midterm Presentation Abdias Josue Perez, Damian Anthony Clogher, Gisselle Orozco, Leo Zheng, Rex Zehao Guo, Sarah-Claire De Luna Santos

Fall 2020 Midterm Abdias Josue Perez, Damian Anthony Clogher, …projects.eng.uci.edu/sites/default/files/DBF midterm... · 2020. 11. 5. · Abdias Josue Perez, Damian Anthony Clogher,

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Page 1: Fall 2020 Midterm Abdias Josue Perez, Damian Anthony Clogher, …projects.eng.uci.edu/sites/default/files/DBF midterm... · 2020. 11. 5. · Abdias Josue Perez, Damian Anthony Clogher,

Fall 2020 Midterm Presentation

Abdias Josue Perez, Damian Anthony Clogher, Gisselle Orozco, Leo Zheng, Rex Zehao Guo, Sarah-Claire De Luna Santos

Page 2: Fall 2020 Midterm Abdias Josue Perez, Damian Anthony Clogher, …projects.eng.uci.edu/sites/default/files/DBF midterm... · 2020. 11. 5. · Abdias Josue Perez, Damian Anthony Clogher,

● Problem Definition and Objective (by Damian)

● Sensor Design (by Leo)

● Aircraft Design (by Sarah)

● Mechanism Design (by Rex)

● Verification Plan (by Abdias)

● Timeline and Schedule (by Gisselle)

Presentation Outline

Page 3: Fall 2020 Midterm Abdias Josue Perez, Damian Anthony Clogher, …projects.eng.uci.edu/sites/default/files/DBF midterm... · 2020. 11. 5. · Abdias Josue Perez, Damian Anthony Clogher,

DBF Problem Definition

○ Design and Manufacture an aircraft to enter in the 2020-2021 AIAA Design/Build/Fly competition

○ Aircraft is designed to achieve best score overall○ Aircraft will carry and tow a sensor package and complete all mission requirements

■ Mission 1: 3 laps w/ no payload in 5 min■ Mission 2: 3 laps w/ payload(senor in shipping containers) in 5 min■ Mission 3: Deploy and recover sensor in 10 min (as many laps as possible)■ Ground Mission: Load and unload payload in the least time possible

○ Our score analysis shows score is maximized by carrying the max number of sensors or carrying 1 sensor. We decided to carry 1 sensor.

○ Constraints: 200 Wh battery capacity, 5 foot wingspan, sensor must be fully contained, sensor must be at least 4 times longer than its diameter.

Page 4: Fall 2020 Midterm Abdias Josue Perez, Damian Anthony Clogher, …projects.eng.uci.edu/sites/default/files/DBF midterm... · 2020. 11. 5. · Abdias Josue Perez, Damian Anthony Clogher,

Scoring Analysis

Page 5: Fall 2020 Midterm Abdias Josue Perez, Damian Anthony Clogher, …projects.eng.uci.edu/sites/default/files/DBF midterm... · 2020. 11. 5. · Abdias Josue Perez, Damian Anthony Clogher,

Sensor Design ● Mission 3 focused:

○ Maximize sensor weight, sensor length, and number of laps

○ Equipped with 3 LED lights controlled via tow cable● Length

○ Directly related to■ Length of fuselage■ Length of the cable (10 time longer than

sensor length)○ The length of sensor is estimated to be about 20

inches long■ Prevents towing cable to be extremely long

(Further testing needed)■ Prevents fuselage to be too long

● Negatively impact landing gear height

Page 6: Fall 2020 Midterm Abdias Josue Perez, Damian Anthony Clogher, …projects.eng.uci.edu/sites/default/files/DBF midterm... · 2020. 11. 5. · Abdias Josue Perez, Damian Anthony Clogher,

Sensor Design

● Determine power needed when cruising

● finalize max weight of sensor and fastest velocity until we exceed battery capacity constraint (estimated to be 5 lb and 12-14 laps)

● Mission 3 focused:○ Maximize sensor weight, sensor length, and number of

laps○ Equipped with 3 LED lights controlled via tow cable

● Weight○ Ensure sensor does not negatively impact the stability

of the aircraft during deployment○ Adding small lifting surfaces to counteract weight○ Process of sensor weight estimation

■ Given battery constraint and the fact that flights need to be maintained in 10 min, the power needed during cruising is limited

■ Aircraft weight assumed by Ws (Wb + Wst + Ws) [assuming Wst = Wb]

■ Determine velocity of aircraft required to create enough lift from sensor

● Directly related to number of laps■ Combine weight/velocity of aircraft, historical

DBF profile drag coefficient, determine both profile/induced drag by aircraft and sensor

Page 7: Fall 2020 Midterm Abdias Josue Perez, Damian Anthony Clogher, …projects.eng.uci.edu/sites/default/files/DBF midterm... · 2020. 11. 5. · Abdias Josue Perez, Damian Anthony Clogher,

Aircraft Design● Constraints

○ Maximum allowable wingspan: 5ft

○ Takeoff field length: 100ft

○ Must carry: sensor in shipping container, shipping container simulators, deploy and

recovery mechanism

○ Drag & Structural Weight

○ Structural weight determined by sensor weight■ Number of sensors needed to carry

● More sensors = increased weight

○ Expected 12-14 laps with speed of 75 ft/s

● Conventional Monoplane○ 5ft wingspan

○ Weight: 11 lbs■ 3 lb battery. 5 lb sensor, 3 lb structure

○ Max battery capacity: 200 watt-hours

○ Tricycle landing gear configuration■ Avoid interference from tail wheel

○ Tractor propeller configuration■ Reduce interference with sensor deployment

● Still need to be considered○ Single/multiple motors

○ Test stability and control

● Modify plane from last year○ Saves time (the sizing of the

aircraft meets our objective

this year)

○ Add container storage

○ Add deploy and recovery

mechanism

Page 8: Fall 2020 Midterm Abdias Josue Perez, Damian Anthony Clogher, …projects.eng.uci.edu/sites/default/files/DBF midterm... · 2020. 11. 5. · Abdias Josue Perez, Damian Anthony Clogher,

Deploying/Recovery Mechanism Requirement

● Light weight● Easy to install● Need enough torque to retract sensor

Implementing Design● Single continuously rotating servo and winch pulley

○ Produces about 130 oz-inches○ Commercial off the shelf component (easy access)

■ Need to be purchased● 200 inch of tow cable

Still need to be considered● Deployment strategy to ensure not negatively impacting

CG of airplane during deployment● Securely retract sensor to the stowed position● Further testing needed● Hatch door

https://www.servocity.com/servo-winch-pulley-h25t-3f-spline/https://www.servocity.com/hsr-2648cr-servo/

Page 9: Fall 2020 Midterm Abdias Josue Perez, Damian Anthony Clogher, …projects.eng.uci.edu/sites/default/files/DBF midterm... · 2020. 11. 5. · Abdias Josue Perez, Damian Anthony Clogher,

TestingPurpose of testing

● Confirm our assumption○ Sensor drag and lift○ Test sensors with different weights

■ Towed by existing aircrafts○ Cable length limits

● Help revising design iterations○ Deploy/retract mechanism○ Sensor light control○ Sensor lifting surfaces

Goal: figure out maximum senso weight and length that are flyable.

Page 10: Fall 2020 Midterm Abdias Josue Perez, Damian Anthony Clogher, …projects.eng.uci.edu/sites/default/files/DBF midterm... · 2020. 11. 5. · Abdias Josue Perez, Damian Anthony Clogher,

Timeline●

●●

Page 11: Fall 2020 Midterm Abdias Josue Perez, Damian Anthony Clogher, …projects.eng.uci.edu/sites/default/files/DBF midterm... · 2020. 11. 5. · Abdias Josue Perez, Damian Anthony Clogher,

Schedule

Sensor

Aircraft

Deploy/Recovery Mechanism

November December

Week 6: Determine sensor manufacturing planWeek 7-8: Sensor manufacturing

Week 9: Sensor Flight testingWeek 10: Integrate test results into aircraft design

Week 6-7: Preliminary design studyWeek 6-9: Initial Prototype Aircraft manufacturing

Week 10: design iterations based on sensor testing results

Week 6-7: Mechanism Conceptual designWeek 8-9: Prototype manufacturing

Week 9: Preliminary design Week 10: Test proof of concept of towing capability

Page 12: Fall 2020 Midterm Abdias Josue Perez, Damian Anthony Clogher, …projects.eng.uci.edu/sites/default/files/DBF midterm... · 2020. 11. 5. · Abdias Josue Perez, Damian Anthony Clogher,

Question?

Team Website: <http://projects.eng.uci.edu/projects/2020-2021/design-build-fly>DBF 2021 Rules: <https://www.aiaa.org/dbf>

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