Presentation Symposium UAV
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Transcript of Presentation Symposium UAV
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Low-Cost High-Performance UAV
DSE Group 13
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Content
Introduction
Concepts
Aerodynamics
Flight Performance
Autonomy, Communication
Structures, Materials
Manufacturing
Conclusion
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Project Objective Statement
Design a low-cost UAV with the emphasis on manoeuvrability
and manufacturability with 10 students within 11 weeks.
Monitor an area for wildlife, suspects orcars and chase them when necessary.
Mission Need Statement
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Requirements
Rate of climb of10 m/s for 5 s
Maximum speed of90 km/h
Endurance of1 hour
Endurance of10 minutes at full power Mass < 2 kg
At least 75% of recyclable materials
The propulsion system must be electrical
Turn radius < 5m Stall speed < 36 km/h
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Requirements vs. Market
Zephyr Unicorn Requirements
Mass 2.27 kg 1.81 kg 2 kg
Min airspeed 56 km/h 48 km/h 36 km/h
Max airspeed 129 km/h 97 km/h 90 km/h
Economicendurance
60 min 60 min 60 min
Price (airframe) 2,540 3,170 low
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CONCEPTS
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Concepts
5 concepts:
Conventional
Double-boom inverted V-tail
Prandtl plane
Delta
Flying wing
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Flying Wing Concept
Efficient aerodynamics
Thick airfoil
Easy takeoff/landing
Low weight Robust
Easy shape to manufacture
Low risk of design
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AGILIS
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AERODYNAMICS
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Airfoil Selection
MH78:
Reflex airfoil
High thickness
CoG in front of Cp
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Wing Sizing
Paramter Value
Surface 0.48 m2
Sweep 29Taper 0.44
Span 1.4 m
Root chord 0.45 m
Turbulators
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FLIGHT PERFORMANCE
http://www.wallpapersonly.net/wallpapers/sukhoi-su-26-single-seater-aerobatics-plan-1440x900.jpg
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Elevons - Landing Strips
Elevons:Ailerons and elevators
71% of the half-span
4 Aramid strips
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Control Surface Actuation
Completely in wing
Provide deflection
Tape as hinge
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Turn Performance
Best level turn:
5 m radius and 2 s
Immelmann turn within 1.6 s
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Motor/Propeller/Controller Sizing
Max 220 W of propulsive power
(draws 400 W from battery)
Climb rate 14 m/s Efficiency 55 % - 79 %
http://www.scorpionsystem.com/http://www.hitecrc.de/store/product.php?productid=21413&cat=330&page=1http://www.mikrokopter.us/shop/image/cache/data/small_parts/TP500025c-500x500.jpg
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Battery Sizing
LiPo battery, 66.6 Wh
10 min at max speed
72 min of economic flight endurance
http://androidspin.com/wp-content/uploads/2011/07/battery.jpg
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Electronics View
http://www.scorpionsystem.com/http://www.hitecrc.de/store/product.php?productid=21413&cat=330&page=1http://www.mikrokopter.us/shop/image/cache/data/small_parts/TP500025c-500x500.jpg
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AUTONOMY ANDCOMMUNICATION
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Communication
For telemetry:
One antenna insideAGILIS,
two in ground station
18 km downlink
9 km uplink
For video:
3G antenna in UAV and on
ground
Limited by 3G coverage
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Tracking Demo
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STRUCTURES ANDMATERIALS
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Transportability
Beams and magnets
Click and fly
Easy access to batteries
45cm
70 cm
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Flight Loads
Up to load factor of 5.5
in turn
Up to 27 N of drag
50% safety factor
8.25 ultimate load
factor
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Structural Analysis
Created a model to
estimate:
Normal stresses
Shear stresses
Deflections
Twist
Sandwich structure
best for stiffness,
durability with
average weight
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Materials Choice
GFRP as skin of the sandwich
EPP foam as core of the
sandwich
CFRP for the hollow beams
PET for the fairing
PET
GFRP
CFRP
EPP foam
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Structural Analysis
Level Flight Ultimate Load
Vertical Tip Deflection [mm] 0.5 6.3
Twist at Tip [deg] 0.0006 0.67
Max Stress in Skin [MPa] 2.3 18.2
Max Stress Core [Pa] 86 2000
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MANUFACTURING
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Production Process
Hot wire cutting
Laminating
Milling
Glueing
Final assembly ofpayload
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Sustainability
Electric Propulsion
75% Recyclable Materials
Substitute for Helicopters or Cars
1,000 Flight Cycles
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CONCLUSION
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AGILIS vs. Market
Zephyr Unicorn
Wing Span 1.52 1.52 m 1.4 m
Mass 2.27 kg 1.81 kg 1.43 kg
Min airspeed 56 km/h 48 km/h 27 km/h
Max airspeed 129 km/h 97 km/h 115 km/h
Economicendurance
60 min 60 min 72 min
Max speed
endurance
- - 10 min
Price (airframe) 2,540 3,170 1,640(cost + 100%)
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Project Objective Statement (POS)
Design a low-cost UAV with the emphasis on manoeuvrability
and manufacturability with 10 students within 11 weeks.
Monitor an area for wildlife, suspects orcars and chase them when necessary.
Mission Need Statement (MNS)
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Recommendations
Wind tunnel test
Prototype
Detailed structural
analysis
Launch holes
http://www.plasticsportal.net/wa/plasticsEU~en_GB/function/conversions:/publish/common/images/news_images/2011/11_362_large.jpg
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Future Plans
Build prototype in summer
Demonstrator for UAV
competition
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We might see it
flying like this
one day!