Accession Number : ADA289576

Title :   Vibration Control Using Chaotic Motion Stabilizers.

Descriptive Note : Final rept. Jun-Dec 94,,

Corporate Author : RHEOLOGY RESEARCH GAITHERSBURG MD

Personal Author(s) : Don, David L. ; Regan, Edward S.

PDF Url : ADA289576

Report Date : 20 DEC 1994

Pagination or Media Count : 30

Abstract : Chaotic Motion Stabilizers transform chaotic behavior into predictable periodic motion. Our product enhances the performance of active damping systems, eliminates the need for damping devices in some applications, and increases the variability of passive damping methods. We have based our product on the observance that chaotic attractors typically have infinite numbers of unstable periodic orbits. The device attempts to stabilize existing orbits in the attractor - not create new ones. The process is straight forward. First, determine unstable periodic orbits embedded in the chaotic attractor. Examine these orbits and choose ones that yield improved system performance. Finally, tailor small-time dependent parameter perturbations to stabilize the orbit. To make the necessary system parameter changes that transform chaotic motion into periodic motion, we will utilize electrorheological (ER) materials. For Phase 1 research we modeled the behavior of an ER magnetoelastic system and incorporated our control algorithm into the model. We then compared the theoretical results with experimental testing where similarities were observed.

Descriptors :   *VIBRATION, *OPTICAL DETECTION, *CHAOS, *ELECTRONIC EQUIPMENT, MATHEMATICAL MODELS, ALGORITHMS, COMPUTERIZED SIMULATION, MAGNETIC FIELDS, ANTIMISSILE DEFENSE SYSTEMS, PARAMETERS, SIGNAL TO NOISE RATIO, DAMPING, PASSIVE SYSTEMS, MATHEMATICAL PREDICTION, RHEOLOGY, PERTURBATIONS, CONTROL THEORY, ELECTROMAGNETIC COMPATIBILITY, PERIODIC VARIATIONS, STABILIZATION SYSTEMS.

Subject Categories : Electrical and Electronic Equipment
      Optical Detection and Detectors
      Theoretical Mathematics

Distribution Statement : APPROVED FOR PUBLIC RELEASE