NDLI: Mechatronic system with two strong nonlinearities

Content Provider	IEEE Xplore Digital Library
Author	Pust, L.
Copyright Year	2000
Description	Author affiliation: Inst. of Thermomech., Czechoslovak Acad. of Sci., Prague, Czech Republic (Pust, L.)
Abstract	A simplified mathematical model of a stiff rotor supported by a controlled active magnetic bearing (AMB) is studied with main attention given to the influence of two types of strong nonlinearities. Great displacements cause impacts in the emergency retaining bearing (hardening nonlinearity). The limited output current of a power amplifier introduces the softening nonlinearity into the control feedback loop. After ascertaining the stability domain for small oscillations, the behaviour at high amplitudes, when strong nonlinearities come into action, is analysed by means of the method of equivalent linearization and of numerical simulation. The mutual effect of both strong nonlinearities and the existence of quasiperiodic and chaotic oscillations etc. are shown with examples and will be illustrated by response curves, phase-plane trajectories, time histories and Poincare mapping.
Starting Page	505
Ending Page	508
File Size	311775
Page Count	4
File Format	PDF
ISBN	0780364341
DOI	10.1109/COC.2000.874318
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-07-05
Publisher Place	Russia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Mechatronics Mathematical model Control nonlinearities Magnetic levitation Power amplifiers Softening Feedback loop Stability analysis Numerical simulation Chaos
Content Type	Text
Resource Type	Article

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