Double Double-pendulum

Double pendula side-by-side for demonstration of
- sensitivity to initial conditions (SIC),
- rate of divergence depends on the total energy of the system (Lyapunov exponent),
- existence and shadowing of periodic orbits (POs),
i.e. some fundamental properties of chaotic dynamics.

Slider sets and displays the magnitude of difference between the pendula,
which increases as time progresses.
When viewing POs, the slider sets the maximum length of nearby POs displayed.

Drag pendulum to starting position, then press play.
If displaying POs, this will select a PO as an initial condition.

Slow-motion option in settings.

A clean and simple demonstration piece.
(By the author of openpipeflow.org)
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What's New

Now possible to start from a periodic orbit - go into 'POs' mode then drag pendulum to select orbit.
Replaced squares with octagons!
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Additional Information

Updated
February 2, 2016
Size
880k
Installs
1,000+
Current Version
1.10
Requires Android
2.2 and up
Content Rating
Everyone
Permissions
Offered By
Ashley P. Willis
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