1 Air Jellyfish Design Team #1 Jacob Chard Ben Sponagle Chris Theriault Shane Yates Supervisor: Dr....
23
1 Air Jellyfish Design Team #1 Jacob Chard Ben Sponagle Chris Theriault Shane Yates Supervisor: Dr. Marek Kujath
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Transcript of 1 Air Jellyfish Design Team #1 Jacob Chard Ben Sponagle Chris Theriault Shane Yates Supervisor: Dr....
1
Air Jellyfish
Design Team #1Jacob Chard
Ben SponagleChris Theriault
Shane YatesSupervisor: Dr. Marek Kujath
2
OutlineOutline
• Background
• Design Requirements
• Design
• Analysis
• Future Work
• Conclusion
3
Inspiration: FestoInspiration: Festo®® AirJelly AirJelly
• Remote-controlled airborne jellyfish
• Central electric drive moves tentacles
• Horizontal motion controlled by centre-of-mass-shifting pendulum Source: www.festo.com
Background
Design
Future Work
Conclusion
Analysis
Design Requirements
4
ObjectivesObjectives
• Mimic appearance of a jellyfish
• Achieve flight
• Create effective advertising medium
Background
Design
Future Work
Conclusion
Analysis
Design Requirements
5
Design RequirementsDesign Requirements
1. Fit in a cube with 3m sides
2. Generate vertical propulsion with flapping appendages
3. Rise to a height of 8m
4. Operate for a period of 30 minutes
5. Be maneuverable in three dimensions
Background
Design
Future Work
Conclusion
Analysis
Design Requirements
6
Design RequirementsDesign Requirements
6. Be operational at a distance of 20m away from operator
7. Have an attached advertisement that is interchangeable
8. Function in an indoor and outdoor environment
9. Be aesthetically pleasing as it is to be used as an advertising medium to draw attention
Background
Design
Future Work
Conclusion
Analysis
Design Requirements
7
Component SystemsComponent Systems
• Six systems were considered1. Balloon/Frame
2. Power Supply
3. Power Transmission
4. Leg Drive
5. Legs
6. Directional Control
Background
Design
Future Work
Conclusion
Analysis
Design Requirements
8
Selected DesignSelected Design
Background
Design
Future Work
Conclusion
Analysis
Design Requirements
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Selected DesignSelected Design
• Single helium-filled balloon with frame for component attachment
Background
Design
Future Work
Conclusion
Analysis
Design Requirements
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Selected DesignSelected Design
• DC Motor drives paddles via scotch yoke and cables
Background
Design
Future Work
Conclusion
Analysis
Design Requirements
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Selected DesignSelected Design
• Rigid legs with folding paddles provide vertical thrust
Background
Design
Future Work
Conclusion
Analysis
Design Requirements
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Selected DesignSelected Design
• Dual fans provide movement in horizontal plane
• Radio control system
• Batteries supply electrical power
Background
Design
Future Work
Conclusion
Analysis
Design Requirements
13
BudgetBudget
Background
Design
Future Work
Conclusion
Analysis
Design Requirements
System Cost
Balloon $350
Frame/ Leg Drive $670
Legs $130
Power Supply $220
Power Transmission
$360
Steering/Control $270
Total: $2000
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Torque Requirement Torque Requirement AnalysisAnalysis• Torque requirement of motor
dependent on several factors– Mass of legs– Surface area of paddles– Length of stroke– Angular velocity of legs
Background
Design
Future Work
Conclusion
Analysis
Design Requirements
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Torque Requirement Torque Requirement AnalysisAnalysis
Background
Design
Future Work
Conclusion
Analysis
Design Requirements
On leg upswing, assuming 3000 rpm motor:
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Preliminary TestingPreliminary Testing
• Modeling behaviour of device is extremely difficult– Flexible legs– Drag forces
• A counterweighted testing rig was constructed to test leg prototypes
Background
Design
Future Work
Conclusion
Analysis
Design Requirements
17
Testing RigTesting Rig
Background
Design
Future Work
Conclusion
Analysis
Design Requirements
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Results of TestingResults of Testing
• Rejected flexible legs in favour of rigid legs with hinged paddles
• Opted for double pulley mechanism rather than pulley-spring mechanism
• Verified that maximum torque load occurs on leg upstroke
Background
Design
Future Work
Conclusion
Analysis
Design Requirements
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Future WorkFuture Work
• Additional preliminary testing to confirm motor and battery specifications
• Complete strength analysis of frame and legs
• Parts and materials acquisition• Design tether for outdoor use• Assembly• Testing and refinement
Background
Design
Future Work
Conclusion
Analysis
Design Requirements
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ConclusionConclusion
• Strengths– Unconventional design will provide an
effective advertising medium– Preliminary testing has provided a
wealth of information
• Challenges– Minimizing weight– Gaining sufficient thrust from legs– Completing project within budget
Background
Design
Future Work
Conclusion
Analysis
Design Requirements
21
AcknowledgementsAcknowledgements
• Team 1 would like to recognize the following organizations for providing the necessary funds:– Shell Canada Limited– Department of Mechanical
Engineering, Dalhousie University
Background
Design
Future Work
Conclusion
Analysis
Design Requirements
22
AcknowledgementsAcknowledgements
• The owners of the images used in the presentation template– Sanjay Arachya, picture in top-left
corner (image has been resized)– Markus Nolf, background picture
(image has been flipped, resized, and lightened)
– Both photographs were taken in the Monterey Bay Aquarium, CA, USA
Background
Design
Future Work
Conclusion
Analysis
Design Requirements
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Questions?Questions?
Background
Design
Future Work
Conclusion
Analysis
Design Requirements
Source: Dr. John H. Costello, Providence College, RI
