FINAL DESIGN PRESENTATION

ContentsGoals

Preliminary Design Shortcomings

Final Design Details

Construction Details

Bill of Materials

Product Performance

Lessons Learned

Project Goals

Create a working, autonomous hovercraft that can successfully navigate a course without hitting walls and overcoming the button obstacle at the start of the track.

Preliminary Design Shortcomings

Speed Controller H-Bridge

Materials Sensor Placement

Hull Structure

Parts Quantity Mass (g)

Radius (cm)

Length (cm)

Width (cm)

Height (cm)

Area (cm^2) Weight (N)

Top Plate 1 126.3 n/a 70 60 2.54 4200 1.24

Bottom Plate 1 68.1 n/a 60 50 2.54 2995 0.67

Support Bars 6 .04 n/a 1 1 3 1 negligible

Bottom Plate Holes

6 n/a 0.5 n/a n/a 2.54 0.79 n/a

Hull Structure and Skirt

Center of Pressure

.350m x .250m

Switch Actuation

Stripped CD Drive H-Bridge Relay

Button Presser Circuit

LevitationDelta GFB0912SHG 92x92x50.8mm Ultra High Output

12V Case Fan

Requirement

Flow rate 1.324M3/min

Pressure 5.29mmH20

Manufacturer Fan Curve Tested Fan Curve

Levitation Circuit

Propulsion

FrontBack

Button Pusher

Levitation FanPropulsion Fan

Propulsion FanPropulsion Battery

Levitation Battery

Propulsion

Acceleration

Forward= .15 m/s2 Angular= 1.26 rad/s2

Fan Specs

GWS EDF55D Ducted Fan with Brushless 3900KV

Motor

EDF 50A Ducted Fan with CN12-RLC Brushed Motor Combined Thrust=1.96N

Requirements

Thrust force greater than the Friction force of 1.69 N

Propulsion Circuit

Power

14.8V Lithium-Ion Battery with a 2.2

Amp Capacity and a 5 amp

Maximum Discharge Rate.

11.1VLithium-Ion Battery with a 4.4

Amp Capacity and a 5 Amp

Maximum Discharge Rate.

9V Battery for button-pushing

mechanism

Sensors and Actuators

QTR-8RC Reflectance Sensor

Array

Sharp IR Sensor

GP2Y0A02YK0F

• Wall Distance• Button Distance

• Line Reading• Line Counting

Sensors Circuitry

Control Algorithm

Keeping Straight

Turning

Before During

Returning Straight

After

Building Process

• Cut Deck Pieces

• Glue Decks with Support Bars

• Create Skirt Template

• Cut Fabric• Sew• Attach Skirt

Hull

• Test Fan• Attach• Wire• Test

Levitation

Levitation • Assemble Fans

• Test Fans• Attach

Servos• Wire Servos• Glue Fans to

Servos• Wire Fans• Test

Propulsion

Propulsion

• Strip CD Drive

• Build H-Bridge

• Attach • Wire• Test

Button Presser

Button Presser

• Test Sensors

• Wire Sensors

• Build Sensor Housing

• Attach Sensors

Sensors

Bill of MaterialsPart Model Cost

Hull Structure (with skirt) 16.00

Levitation Fan Delta GFB0912SHG Fan 9.99

Propulsion Fans EDF55D with brushless motor and EDF50A with brushed motor

51.73

Servos HRC31311S HS-311 Standard Servo 15.98

Levitation Battery Li-Ion 18650 14.8V 2200 mAhm 37.99

Propulsion Battery Li-Ion 18650 11.1V 4400 mAhm 56.62

Button Pusher (with H-bridge and motor)

14.66

Arduino 42.50

Sensors QTR-8RC Reflectance Sensor Array + Sharp GP2Y0A020F Distance Sensor

34.95

Circuitry 67.25

Total 347.67

Gantt Chart

Performance

Qualified to Compete!

Pressed the Button!

Navigated the Course!

Under Budget and On time!

Did not place however.

Lessons LearnedLeave plenty of time for parts to ship as companies don’t

always deliver on time

Chances are, something’s going to break. Buy extras if

possible.

Ensure that more than one team member is aware of every

step.

Questions???

?

Bill of Materials

item Model craft $Photosensor Array QTR-8RC Reflectance Sensor Array 14.95Servo (2,0) HRC31311S HS-311 Standard Servo 15.98Levitation fan Delta GFB0912SHG Fan 9.99Wiring 2pc board 1.995v relay (1) 2.995v relay (2) 4.69Glue Liquid Nails 3Infrared Sensor (2,0) Sharp GP2Y0A020F Analog Distance Sensor 20Foam 5Plywood 2Leviation Battery Pack Li-Ion 18650 14.8V 2200 mAhm Part No 31021 37.99Propulsion Battery Pack Li-Ion 18650 11.1V 4400 mAhm Part No 31016 56.62

Heat Sink 1 Heatsink For TO-220 Ohmite Heatsinks 1.8Arduino 42.5Skirt 63 pin-jst wire (1,1) JST 3-pin - BARE 3Propulsion Fan and motor (back) EDF50 EDF-2030x3 Rotor (GW/EDF50A 11.73Transistor MOSFET Transistor 3.29

Propulsion Fan and Motor (front)EDF55-300H with GWBLM005C GWS 2028-6 BRUSHLESS MOTOR 40

CD Drive 5Heat Sink 2 2.99Speed controller 35Perfboard Kit 1.50H-Bridge 9.669 Volt Battery 8

Total 347.67