Poincare cut through phasespace of periodically driven pendulum.
Click image, to see full attractor.
The 3rd dimension corresponds to sled angle and is mapped to time in the animation.
The red dot is NOT part of the strange attractor, but represents to a stable, periodic solution of the same system. It can be observed at the beginning of the video clip "Various UPOs".
More images for the driven chaotic pendulum can be found in the Gallery.
Prof. Dr. Ulrich Vogl