beamchaos: Chaotic beam data

In fractal: A Fractal Time Series Modeling and Analysis Package

Description

A flexible thin steel beam was mounted vertically to a electromechanical shaker which provided a transverse sinusoidal excitation. The beam tip was placed near two rare earth magnets so as to provide nonlinear buckling forces. The beam was treated with a viscoelastic strip adhered to one side to provide a little damping. The addition of the damping treatment helps to form a more distinguishable fractal structure in phase space embeddings. A laser vibrometer was used to record the beam tip velocity and the analog signal streamed to a National Instruments data acquisition board. The data was sampled at 1000 Hz. The gain of excitation was adjusted until (seemingly) chaotic motion was observed.

References

William Constantine (1999), Ph.D. Dissertation: Wavelet Techniques for Chaotic and Fractal Dynamics, Mechanical Engineering Department, University of Washington.

See Also

ecgrr, eegduke, lorenz, pd5si.

Examples

plot(beamchaos)

Example output

Loading required package: splus2R
Loading required package: ifultools

fractal documentation built on May 1, 2019, 8:04 p.m.