AAE450 Spring 2009

Rover Power

Toy Ball Power(Budget and Resizing)

Jeff Knowlton

[Jeff Knowlton] [Power]1

AAE450 Spring 2009 [Jeff Knowlton] [Power]

Power UnitBattery (using two)Lithium Manganese Dioxide Coin

(CR2330 )

3 volts

.26ampere-hr

Cylinder Dimensions

23mm diameter

3mm height

0.004 kg

3% loss per month(self discharge 1 year)

Housing (one per battery)0.05kg

Total 1.56watt-hr at Liftoff 36% loss over 1 year 0.998 Watt-hrs after 1

year 0.108kg Price TBD (< $1000)

2

AAE450 Spring 2009 [Jeff Knowlton] [Power]

3

0 2 4 6 8 10 12 14 16 18 200

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

Watt Usage During deployment

Minutes

Energ

y R

em

ain

ing (

Watt

Hours

)

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 10.98

0.985

0.99

0.995

1

1.005

1.01

Watt Usage During deployment

Minutes

Ene

rgy

Rem

aini

ng (

Wat

t H

ours

)

Deploy Charge

Status Relays

Turn on

Travel Transmit

First Minute Blowup Mission Duration

Photograph

Excess power

• 1 Minute Deploy• 2 Status Relays • 8 Minutes Travel

• 1 Photograph• 8 Minutes

Transmitting

AAE450 Spring 2009 [Jeff Knowlton] [Power]

Power UsageSystem Volts Amperes Watts Rate

Motor(s) 3 0.1812 0.543 8 minutes

CPU <3 <0.01 0.01 Continuous

Transceiver <3 TBD 5 8 minutes

Camera TBD TBD 18 (questionable ) 5 seconds

4

AAE450 Spring 2009

Missing Details <10 %( Hopefully )

~0.875 m wires; 15 gauge? Voltage control for motor (slower for acc.)

Battery Housing Dimensions (for newest update)

[Jeff Knowlton] [Power]5