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Drone Impact Protection System

By:

Nisat Afroz

Hoa Nguyen

Akesh Sohan

Arjun Pillai

Jefferson Ta

Professor:

Dr. Stephen Wrenn

Teaching Fellow:

Katie Jo Sunday

Group 6

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Outline

Problem Overview/ 2 Solutions
Testing Object: Snapple Bottle
12 ft. Drop Test
Oobleck/Testing
Cage/Testing
Previous Methods
Timeline
Budget
Results/Discussion
Future Plans
References
Questions

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Problem Overview / Solutions

Inexpensive material
Lightweight
Oobleck Platform
Protect from high elevation drop
Metal Cage
Protect from side collision

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Testing Object: Snapple Bottle

Glass bottles

Easy to identify when it breaks

Mass similar to drone

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12 Foot Drop Test

Air Resistance Ignored

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Final Velocity	Force Exerted
Vf^2 = Vot^2 + 2at Vf^2 = 0 + 2(9.8m/s^2)(3.6576) Vf = 8.467 m/s Final velocity of bottle = 18.94 mph	Height of drop: 12 ft, Weight of bottle: .23 kg F = ma F = (.23 kg) (9.8 m/s^2) F = 2.254 N = 0.506 lbs

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Oobleck Testing

Mixture of water and cornstarch
Special Properties
Solid/Liquid
Used Snapple bottle
Melt the plastic bag to make compartments
Split into compartment to distribute weight

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Cage Testing

18 Gauge Wire
Free Formed around drone
Protect drone propellor blade
Lightweight
Simplistic Design
Does not interfere with drone airflow

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Previous Methods

Air cushion drop test
Polyester originally used for containing Oobleck
Polyester later used for puncture protection

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The air cushion test from a height of 12 feet was successful but the bottom cushion popped. As a result, we would refer to our Oobleck drop protection system instead of the air cushion because the air cushion system can only be used once before it needs to be replaced.

We used a polyester casing in the beginning since it is waterproof and allowed for movement but the oobleck seeped through the seams. We also wanted a casing where the oobleck wouldn’t pile to one side and would instead spread evenly if the drone were to be tilted. This is why we made a plastic casing with individual compartments.

The wire caging can’t be too simple like the one in the picture because the wires are too malleable and wouldn’t be effective on impact, but they also can’t be surrounding the propellers in case the wires bend in.

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Timeline

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Budget

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Result/Discussion

Oobleck Platform

Taking main impact of collision
Distribute weight into compartments
Survived 12 feet drop test

Wire Cage

Project propellor from side collision
Slightly malleable
Survived 12 feet snapple bottle test

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Future Continuation

Use more resources

Wind Tunnel
3-D Print Cage

Obtain own drone

Drone was borrowed

Difficult to perform tests on it
Unflyable

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Questions?

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References

[1]

P. and D. Quick, “Gimball flying spherical robot takes collisions in its stride,”Gimball flying spherical robot takes collisions in its stride, 31-Oct-2013. [Online]. Available at: http://www.gizmag.com/gimball-flying-robot/29609/. [Accessed: 10-May-2016].

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