ARTEMISAdvanced

Rover Technology for

Exploration on theMoon using

InSitu utilization

Jesse Hecht

Sean Fierman

Cedrick Ngalande

2-Dec-04 USC 2004 AME 557 Space Exploration Architecture

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2-Dec-04 USC 2004 AME 557 Space Exploration Architecture

Assumptions

Lands remotely, un pressurized The motors we chose exist or can be built EVA / entrance / exit and navigation

issues are not our problems

2-Dec-04 USC 2004 AME 557 Space Exploration Architecture

Approach

2-Dec-04 USC 2004 AME 557 Space Exploration Architecture

Rover Design Total Size 14 x 6 x 6 ft (4.3 x 1.8 x 1.8 m) 4 ft diameter wheels (1.2m) Living space, pressurized volume 6.5 x 6 x 6 ft (234ft^3, 6.48m^3)

Chrysler Minivan is roughly 161ft^3 interior Low Center of Gravity Ground clearance – 2.5 ft (0.76m) Break over angle – 31 degrees Door area with 3 access points, 2 ladders Arm Lights by cameras for night vision Weight – 1 ton – less than requirement

2-Dec-04 USC 2004 AME 557 Space Exploration Architecture

Speed

1 mph needs 3 hp 25 mph needs 75 hp

Engine per wheel (instantaneous, no gears, high estimate)

Weight TOTAL 2000 lbs    

Velocity 25 mph 40.225 km/h

Wheel Diam 4 ft    

         

         

Velocity 36.67 ft/s    

Rev per sec 0.5 rev/s    

Ang. Vel 9.17 rad/s    

Torque 1000 lb*ft 1355.75 N*m

Hp 75 per wheel    

2-Dec-04 USC 2004 AME 557 Space Exploration Architecture

Power

Solar Panels

493 Watts sun angle @left horizon (beginning of race)

3259 Watts sun angle @ 12 degrees above horizon

4424 Watts sun angle @ directly overhead (6.5 days into race)

3259 Watts sun angle @ sun setting (13 days into race)

2-Dec-04 USC 2004 AME 557 Space Exploration Architecture

Power

Fuel Cells Space Shuttle 14kW, 66ft^3

(0.155m^3), 200lbs (91kg) + 100lbs (50kg) of oxygen and hydrogen per day (cryogenic) operates for 2600 hours

ARTEMIS – 7kW, 33ft^3, 100lbs + MgH2 and oxygen weight

2-Dec-04 USC 2004 AME 557 Space Exploration Architecture

SPECIALS

Dust Wheel design

Regolith shielding (radiation) 2 inch Al + 1.5 feet of regolith + fuel cell

materials Piloting with no windows!

LCD screens with picture in picture (PIP)

2-Dec-04 USC 2004 AME 557 Space Exploration Architecture

Lunar Wheels

2-Dec-04 USC 2004 AME 557 Space Exploration Architecture

Apollo Rover

Outer & inner frame Wire mesh Titanium

2-Dec-04 USC 2004 AME 557 Space Exploration Architecture

Rooster Tails

Push dirt outward NOT Upward

2-Dec-04 USC 2004 AME 557 Space Exploration Architecture

Turbine or Impeller Channels

Used to move all types of materials

2-Dec-04 USC 2004 AME 557 Space Exploration Architecture

Channels – Remove Dirt

2-Dec-04 USC 2004 AME 557 Space Exploration Architecture

Wheel Cross-Sections

2-Dec-04 USC 2004 AME 557 Space Exploration Architecture

Gravity, Centrifugal Force & Blades

2-Dec-04 USC 2004 AME 557 Space Exploration Architecture

No More Upward Rooster Tails

Main Interface with Lunar surface = Wheels Minimize dirt uplift from wheels

2-Dec-04 USC 2004 AME 557 Space Exploration Architecture

Radiation

2-Dec-04 USC 2004 AME 557 Space Exploration Architecture

Radiation

Rover shell is 2” of aluminum Partial In-Situ shield (1ft – 1.5 ft thickness) Flexible bladders (Internal & External) Fuel Cells

2-Dec-04 USC 2004 AME 557 Space Exploration Architecture

Dose

2-Dec-04 USC 2004 AME 557 Space Exploration Architecture

Problems

Coronal Mass Ejection Majority is protons Fequency varies with

sunspot cycle Solar min = 1 CME

week Solar Max = 2 to 3

PER DAY!!!!!!!!!!

1012 kg @ 1000 km/s

2-Dec-04 USC 2004 AME 557 Space Exploration Architecture

EVA

Pressurized and un pressurized sections Entrance / exit built into structure Ladders for side access

2-Dec-04 USC 2004 AME 557 Space Exploration Architecture

Way Stations

Arrive next to Way Station Use robotic arm for all supplies

Arm places materials through top No EVA

2-Dec-04 USC 2004 AME 557 Space Exploration Architecture

Sight

LCD monitors & cameras for piloting Use HDTV cameras and signal Located all around interior Main screen in front Screens act like windows for pilot Night lights by cameras

2-Dec-04 USC 2004 AME 557 Space Exploration Architecture

How we will win

Minimize complications Wheel size allows us to overcome most

obstacles Wheel base / spacing similar to HUMMER We can run at night Use of way stations

2-Dec-04 USC 2004 AME 557 Space Exploration Architecture

How we will win

We drive constantly rotation cycle crew of 3

  shift 1 shift 2 shift 3 shift 4 shift 5 shift 6 shift 7 shift 8 shift 9 shift 10 shift 11

Sean 8 8 0 8 8 0 8 8 0 8 8

Jesse 8 0 8 8 0 8 8 0 8 8 0

Cedrick 0 8 8 0 8 8 0 8 8 0 8

                      4 days

2-Dec-04 USC 2004 AME 557 Space Exploration Architecture

How we will win

Traverse fast in Maria, slower in HighlandsSpeed (mph)

Time (hrs)

Distance (miles)

Distance (km)

Total Distance (km)

Day 1 25 24 600 965.6 965.6

Day 2 25 24 600 965.6 1931.2

Day 3 15 24 360 579.4 2510.6

Day 4 8 24 192 309.0 2819.6

Day 5 9 24 216 347.6 3167.2

Day 6 8 24 192 309.0 3476.2

Day 7 9 24 216 347.6 3823.8

Day 8 9 24 216 347.6 4171.4

Day 9 12 24 288 463.5 4634.9

Day 10 11 24 264 424.9 5059.8

Day 11 10 24 240 386.2 5446.0

Finish race

2-Dec-04 USC 2004 AME 557 Space Exploration Architecture

How we will win

REUSEABLE ROVER!!! Hybrid power day/night use Towing capability Dust