Boeing 1: Universal Flapping System

1
Boeing 1 Universal Flapping System
Tom, Sean, Jeremiah, Sarah, and Jason

• Sponsored by William H. Grauer
• Boeing, Philadelphia, PA

2
Our Concept

• We expanded on the speaker idea, but chose to use
  larger speakers to provide higher driving forces
  and greater displacement.
• Secondary linkages were used to transform the
  displacement of the speakers into the desired
  motion of the wing.

3
Our Setup.

• Based on test results our team decided upon the
  use of Rockford Fosgate 10 inch 4 ohm subwoofers,
  because of availability and cost. As well as a
  desirable cone geometry for mounting to linkages.
  
• Secondary linkages were constructed using parts
  common to model airplane linkages

4
Our Setup Continued
5
Test Results

• From the test apparatus shown on the previous
  slide, we were able to obtain 5 millimeters of
  excursion from the speakers with 75 kg at 28 Hz.
• With our secondary linkages, this will provide
  enough throw to make our spar move the required
  distance in the oval and at the necessary
  frequency (30 Hz), and overcome the drag forces
  that the spar will encounter.

6
Control

• A four channel 1000 Watt amplifier is used to
  boost output signals to desired levels to drive
  the subwoofers.
• We attempted to use LabVIEW to control the three
  speakers separately through a 7.1 channel PC
  soundcard.
• We have now decided to use wave files and put
  them on a CD to control the device.

7
Secondary Linkages
8
Secondary Linkages (top view)
9
Creating Movement

• The speakers are controlled by a wav file with
  frequencies out of phase.
• The motion is then transferred to the secondary
  linkages, which create larger movement through
  geometry.
• That movement actuates the thrust plate, moving
  the spar through the desired motion.

10
Next Steps

• Assemble the linkages and start testing them with
  the speakers.
• Continue working on a way to control the third
  channel.
• Obtain necessary offsets and amplitudes of the
  signals for X and Y directions to create the oval
  pattern.
• Decrease the amount of sound output from the
  speakers.

11
Questions

• ???