Magnetic levitation by chaotic oscillation: a new method

Author

Kaplan, B.Z. ; Horen, Y. ; Cohen, G. ; Hellerman, Y.

Author_Institution

Dept. of Electr. & Comput. Eng., Ben-Gurion Univ. of the Negev, Beer-Sheva, Israel

Volume

38

Issue

5

fYear

2002

fDate

9/1/2002 12:00:00 AM

Firstpage

3475

Lastpage

3481

Abstract

We suggest an unusual new switching-mode control strategy for magnetic levitation. We show that the apparently simplest control strategy, one that relies on a single decision plane, is not capable of levitation, but relying on two decision planes is sufficient for levitation. We demonstrate that the information, whether the suspended object is above an upper reference plane or below a slightly lower reference plane or in between, is sufficient for activating a switch that energizes an electromagnet in such a manner that it stably supports the suspended object. We have analyzed the dynamic features of the suggested system theoretically and have investigated them by experiment and comprehensive simulation. An interesting dynamics associated with chaotic behavior is revealed: the region of stability of the suspended object is related to a strange attractor. We discuss possible applications of the present method

Keywords

chaos; dynamics; electromagnetic oscillations; electromagnets; magnetic levitation; position control; stability; variable structure systems; chaotic behavior; chaotic oscillation; dynamics; electromagnet; magnetic levitation control; reference plane; stability region; strange attractor; suspended object; switching-mode control strategy; switching-mode magnetic suspension system; two decision planes; Analytical models; Chaos; Control systems; Electromagnets; Energy consumption; Magnetic levitation; Magnetic switching; Magnetic variables control; Switches; Velocity control;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2002.802707

Filename

1041965