Adaptive vibration control of a rigid rotor supported by active magnetic bearings

Journal Article · Tue Oct 01 04:00:00 EDT 1996 · Journal of Engineering for Gas Turbines and Power

DOI:https://doi.org/10.1115/1.2817001· OSTI ID:397912

Lang, O; Wassermann, J; Springer, H ^[1]

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1. Technical Univ. of Vienna (Austria). Dept. of Mechanical Engineering

In this paper a digital numerical simulation is carried out in which active magnetic bearings (AMB) are applied to control nonlinear and nonsynchronous vibrations of a rigid rotor excited by nonconservative cross-coupling mechanisms. Through an adaptive control algorithm of the AMB controller, unknown cross-coupling parameters of a rotor are estimated on-line by a standard least-square estimator along with a time-varying so-called forgetting factor. The parameters of the AMB controller are adapted in order to compensate for the cross-coupling effects and to stabilize the rotor system. Transient cross-coupling response characteristics are calculated by numerical simulation of a rigid rotor supported by two active magnetic bearings. With this kind of control strategy, the stability of the system can be guaranteed for much higher values of cross-coupling coefficients than with common nonadaptive feedback controllers, designed with pole placement or least square algorithms.

• Sponsoring Organization: USDOE
• OSTI ID: 397912
• Report Number(s): CONF-950629--
• Journal Information: Journal of Engineering for Gas Turbines and Power, Journal Name: Journal of Engineering for Gas Turbines and Power Journal Issue: 4 Vol. 118; ISSN 0742-4795; ISSN JETPEZ
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
33 ADVANCED PROPULSION SYSTEMS
DAMPING
MAGNETIC BEARINGS
MECHANICAL VIBRATIONS
ROTORS
STABILIZATION