SMILE Engineering Transportation Challenge Weekend 2009

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					        SMILE
Engineering Transportation
    Challenge Weekend
           2009
              Objective
• As hired consultants, your team will
  design and construct a crane prototype
  that can lift a Maglev train car onto the
  magnetic guideway track.
               Background
• There’s a growing need for quicker and more
  efficient methods for moving people and
  goods.

• Researchers have turned
  to using electromagnetic rails
  and trains: magnetic levitation
  or Maglev

• One of the key principles in maglev design is
  reduced friction (which means reduced costs)
         Engineering Process
•   Identify the problem
•   Preliminary Design
•   Design Refinement
•   Construction
•   Test
•   Redesign for changes
•   Retest
Crane Specifications
1) Lifting Mechanism of Crane:
• Boom: must move right & left
  and up & down.

• Hydraulics must be used
  for lifting load.

• Use string for the cable.
  – The cable must have a winder (roller)
    mechanism that allows the lifting hook to go
    up and down.
2) Rotating Mechanism of Crane:
• Boom rotation by mechanical
  means – not by directly turning
  with your fingers.
  – Turntable at base of crane.
  – Rotation is controlled by a gear system (allows
    boom to turn right and left).


• You are allowed to hold down the base with
  fingers while operating the controls.
  – *Hint: The counterweight is the most important
    part of the mechanism used to balance the crane
    during lifting operations.
Maglev Car Specifications
•   Your Maglev car design must
    accommodate:
    –   A hook-up device (i.e. paperclip) for
        attachment to crane on the top of the car
    –   Magnetic stripping on the bottom of the
        car
    –   A red line across the front for testing
When testing your Maglev car:
• You may use your fingers
  to attach and detach your
  Maglev car to and from
  your crane.

• It must operate without
  being pushed, touched, or interfered
  with once in place at the starting
  position on the track
           I.    First Task:
                Design Process


• 10:15-11:30 AM
• Discuss and sketch out prototypes for
  your ideal crane and maglev designs.
• Construction should begin only after
  the design has been perfected and all
  members of the group have agreed.
       Design Process cont.
• Biggest Challenge:
  – Combining many different design needs into
    one result

  **Remember that you
  will have to compromise
  with one another and
  probably make changes to
  your designs along the way.
          Design Process cont.
• When designing the Maglev, keep in mind:
  –   1) Balance (very important!)
  –   2) Placement and size of magnets
  –   3) Drag and aerodynamics
  –   4) Friction
              **Look in your packet for details
          II. Second Task
           Construction
• 12:25-2:15 PM   AND   3:00-5:00 PM
           Construction cont.
• Division of Labor
  – Two people:
    • 1) Maglev Car
    • 2) Rotation of Base (crane)
  – Two people:
    • 1) Hydraulics to raise boom
    • 2) Boom
  – Two people:
    • 1) Crank to turn base
    • 2) Crank to raise and lower boom string w/ load
        Construction cont.
• You can use the tracks at any time to
  test out your design.

• When your Maglev car is ready, you can
  have a trial run down the track to make
  any last minute adjustments to your
  design.
           Tracking Cost
• Before you start building
the crane and maglev car,
figure out the cost.
• Modify your design if
necessary.
• Purchase extra materials,
if needed, but be sure to keep
track.
         III. Third Task:
              Testing
• 6:00-8:00 PM
             Testing cont.
• There will be two tracks:
  – 1) Stopwatch track   

  – 2) Technology (IMU) track 



  **You will be testing your prototypes on
    BOTH tracks.
    Testing cont.

• When you are ready to test:
  – 1) Bring your crane and maglev car over to
    the Stopwatch Track

  – 2) Two people will operate the crane (one
    holds the base and the other operates)

  – 3) The other members will stand along the
    track at the markers with stopwatches
           Testing cont.
– 4) Record data

– 5) Repeat process for a total of 3 trials

– 6) Go back to your group table to graph
  data and answer questions
             Testing cont.
– 7) Take your Maglev car to the Technology
  (IMU) Track
– 8) Remove your hook and place the IMU on
  your car (using the Velcro) – even distribution!
– 9) Do a test run and look at the graph that the
  computer produces
           Testing cont.
– 10) Sketch the graph in your packet

– 11) Compare to the other graph that you
  made and answer questions.
       When you’re done…
• You will display your graphs and
  question sheet next to the prototype
  at your table.
               SAFETY


• All tools at the tool table are to be used
  at the tool table.

• Utility knives are to be used ONLY by
  adults at the tool table.
• Safety glasses must be worn at the tool
  table.
          TEAMWORK
• Failure is an
essential step
towards success.
Don’t be discouraged
when something
you worked on doesn’t work the first
   time. Just try again!

				
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posted:9/14/2012
language:English
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