presentation symposium uav

7/31/2019 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!

presentation symposium uav

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