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THEORY1.HLP
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1995-02-28
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530b
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20 lines
Using PARAMETERS, you can specify the frequency
(F) and the phase (P) of all four pendulums in
a harmonograph.
The parametric equations you are adjusting are:
-rt
X = e [sin(F t + P ) + sin(F t + P )]
1 1 2 2
-rt
Y = e [sin(F t + P ) + sin(F t + P )]
3 3 4 4
where: r = damping factor, t = time
F = frequency, P = phase angle
The four pendulums in a real harmonograph
control the X and Y motions of the paper and
pen.