Transcript Document

UCSD Human Powered
Submarine Team – Odin’S Rage
2009
Team History

1999 – 2000: “Subsonic” Set
new world record speed of
3.47 knots
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Unique non-propeller driven
design. Utilized a “dolphin
tail” motion
Project Management
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Team Plan
– Use Brand New Hull
– Divide the project into
parts and create
responsible groups
• Drive Train
• Steering
• Fin
Hull
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5 layers of fiberglass
 Cured with “Sun-rez”
UV cured resin
 Acrylic windows
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Additional 2 layers
around belt for strength
 Knee and Heel blisters
to reduce volume
Drive Train Design
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Using SolidWorks Cad Software
helped us design for simple
manufacturability.
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Using a bike-chain drive, it moves
a piston rod to translate rotational
motion to lateral motion
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3:1 Gear Ratio gives us the
needed mechanical advantage
Drive Train Construction
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99% of all materials used
are either aluminum,
stainless steel, or plastic
for corrosion resistance.
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By modifying store bought
bicycle parts we kept
fabrication simple.
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The lightened aluminum
boom is hollowed out to
reduce weight but not
sacrifice strength
Fin Design
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Instead of adapting
theoretical biometric fins
(fish, dolphin, etc.), use a
symmetric airfoil to calculate
thrust
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The boom sweeps 90° and the
fin is free to rotate 90° relative
to the boom, which provides
great lift and little drag.
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Combining high sweeps per
minute with a large surface
area wing of high aspect ratio
gives the best theoretical
performance.
Fin Construction

A CAD model from
SolidWorks was machined
using an automated milling
machine (CNC technology)
– Ensuring symmetry
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Layered with Fiberglass
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Fitted with sweep-limiting
knuckle.
Steering
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Surfboard fins
Morse Cables
Simple actuation
Strong materials
Epoxied Shaft
Wide range of motion
Large Surface area
Avoid Walls!
Controls
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Mounting all controls,
mechanically, to a single
handle
– Removes electrical problems
– Frees other hand as solid
support base.
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Hydraulic actuators have
been replaced with Morse
push-pull flexible cables for
corrosion resistance and
ease of operation and
maintenance
Safety Features
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Quick release hatch - just
pull!
No need for pilot restraint
Spare air in case the pilot’s
main air supply fails
Clearly-marked safety
features for support divers
Pop-up buoy attached to
dead-man’s switch
Future Goals

Perfect current
systems
 Minimize drag and
maximize power
output for faster
speed
 Computer
controlled variable
pitch adjustment
Lessons Learned
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Press-fits are not
truly secure!
 Gather Sponsors
before academic
year
 Early training
 K.I.S.S.
Sponsors
US Grants