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
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
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
Apollo Rover
Outer & inner frame Wire mesh Titanium
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
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
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
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