a friction driven oscillator |
| (click on an image for a larger view) |
| A friction driven oscillator: A solid bar
is supported by two wheels that move in opposite directions. The resulting
movement of the bar is the difference between two friction transverse
forces. The resultant confines the bar roughly to the middle of the
systemA friction driven oscillator: A solid bar is supported by two
wheels that move in opposite directions. The resulting movement of
the bar is the difference between two friction transverse forces.
The resultant confines the bar roughly to the middle of the system. |
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A stationary video camera views the edge
of the solid bar. The position of the edge is detected with
a personal computer. Its time series (position of the bar) is
recorded at a frequency of 30 Hz. |
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| A view of the friction experiment from above: A pancake
motor in the middle powers the two wheels through a set of gears
and speed reducers. The speed of the motor can be adjusted using
the controller at the left-bottom corner. |
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A side view of the experiment: Two red
wheels drive the bar's movement back and forth. Data on this
experiment will be posted in our preprints under "friction
driven oscillator". |
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