Paper of possible interest:
Lee Barford, Nicholas Tufillaro, Daniel Usikov, Leonid Marochnik,
and Robert McCutcheon
Calibration of Hubble Space Telescope Focal-Length Variations Using
the Emedding Technique.
2001 Flight Mechanics Symposium (NASA), Edited by John P. Lynch, NASA
Goddard Space Flight Center, Greenbelt, Maryland, June 19-21
2001.
File Name: io_11.pdf
Mechanical examples where this type of modeling has been applied include a mechanical pendulum, a disk drive armature, and the Hubble Space Telescope.
Figure 1: Picture of mechanical apparatus.
Figure 1: Schematic of apparatus.
Figure 3: Drive Electronics.
Figure 4: Phase/velocity recording electronics.
The device is currently being modified to allow driving by an
abitrary wave form.
Angular resolution uses HP's
optical encoder wheel.


For the initial design of the chaotic pendulum apparatus see: J.
Blackburn, S. Vik, and B. Wu, Review of Scientific Instruments, 60
(3), page 422 March 1989.








