DemoSat IIIDemoSat IIILaunch Readiness Review - July 29, 2005Launch Readiness Review - July 29, 2005

Presented by:

David GoodingErik Andersen

Anna VigilMatt ElsnerAl Crawley

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Mission: RoverSatMission: RoverSat

Weight SpecificationWeight Specification 1.85 kilograms 1.85 kilograms (allowed 350g extra)(allowed 350g extra)

Box must open independently upon landingBox must open independently upon landing Burn through the fishing line that holds the box closedBurn through the fishing line that holds the box closed Springs open / turn box uprightSprings open / turn box upright

Rover must maneuver independentlyRover must maneuver independently Detach itself from boxDetach itself from box Move forward out of box at least 2ft, and drive around for at Move forward out of box at least 2ft, and drive around for at

least 10 minutes.least 10 minutes. Sense object, stop, take picture, reverse and turn, then Sense object, stop, take picture, reverse and turn, then

move forward around objectmove forward around object

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Mission GoalsMission Goals

1)1) Box land on one of three designated sides.Box land on one of three designated sides.

2)2) Be the first team to have box open and rover Be the first team to have box open and rover travel out of box independently.travel out of box independently.

3)3) Rover navigate through terrain while taking Rover navigate through terrain while taking pictures of various objects.pictures of various objects.

4)4) Rover maneuver around objects correctly.Rover maneuver around objects correctly.

5)5) Rover travel around for at least 10min taking Rover travel around for at least 10min taking at least 15 pictures.at least 15 pictures.

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Motor Right

Motor Right

To Burn Relay

Box Switches

Bumper Switches

Motor Enable

Motor Left

Wake Up PIC 2

Motor Left

PIC 1

Servo

Camera Power

IR Sensor

PIC 2

+5V

WakeUp From PIC 1

Ground

Camera Trigger

To PIC 1 Motors

Micro ControllersMicro Controllers

Turn on Servo

From PIC 2

+5VGround

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PIC 1 Running

During Flight

Initialize Pins

10 Min Elapsed?

Open Box

Wake Up PIC 2

Run Motor Program

Object Hit?

Interrupt Program:

Stop/Reverse

Turn Camera On

Servo Sweep

Object Sensed?

Send Signal to Motors to

Stop

Take Picture

Delay

No

Yes

No

Yes

Yes No

PIC 2 in Sleep Mode

During Flight

Switches Pressed

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Before - AfterBefore - After

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Circuit BoardCircuit Board

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3D Model 3D Model

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3D Model Side View3D Model Side View

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Mass BudgetMass BudgetBoxBox Mass (g)Mass (g) RoverRover Mass (g)Mass (g)

Foam CoreFoam Core 264.6264.6 IR Sensor / ServoIR Sensor / Servo 63.763.7

Press PadPress Pad 195.3195.3 CameraCamera 73.473.4

BracketBracket 51.451.4 Twin Motor GearBoxTwin Motor GearBox 74.574.5

RodRod 33.633.6 Frame + BumperFrame + Bumper 99.599.5

Momentary SwitchesMomentary Switches 31.231.2 WheelsWheels 114.4114.4

SpringsSprings 110.5110.5 HardwareHardware 38.438.4

Foam PaddingFoam Padding 58.458.4 Circuit BoardCircuit Board 148.7148.7

HOBOHOBO 50.050.0 BatteriesBatteries 205.5205.5

OtherOther 115.4115.4 OtherOther 106.8106.8

TotalTotal 910.4910.4 TotalTotal 924.9924.9

Total Mass = 1835.2gTotal Mass = 1835.2g

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ExpensesExpenses

$ 20.00$ 20.00Pulleys + BeltPulleys + Belt

$ 7.05$ 7.05Relays (3 @ $ 2.35)Relays (3 @ $ 2.35)

$ 21.00 $ 21.00 Battery PackBattery Pack

$ 7.00$ 7.00Copper BoardCopper Board

$ 25.00$ 25.00Foam BoardFoam Board

$ 473.00$ 473.00Total Total

$ 15.40$ 15.40PIC (4 @ $ 3.85)PIC (4 @ $ 3.85)

$ 20.00$ 20.00Switches (4 @ $ 5.00)Switches (4 @ $ 5.00)

$ 60.00$ 60.00Twin Motor Gear BoxTwin Motor Gear Box

$ 60.00$ 60.00Servo / IR SensorServo / IR Sensor

$ 240.00$ 240.00Digital Camera (3 @ $ 80.00)Digital Camera (3 @ $ 80.00)

CostCostItemItem

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TestingTesting Pressure testPressure test

Foam did not expand but compressed under vacuum Foam did not expand but compressed under vacuum Cold testCold test

In Ice chest with dry ice for 1 ½ hoursIn Ice chest with dry ice for 1 ½ hours Driving on various surfaces Driving on various surfaces Box opening testBox opening test

Many trials of tying box closedMany trials of tying box closed Drag test (picture)Drag test (picture) Drop TestDrop Test

Straight fall, tumble fall, etcStraight fall, tumble fall, etc Full Function testFull Function test

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Drop TestsDrop Tests

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Full Function TestFull Function Test

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Pictures of MesaPictures of Mesa

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