Application of active magnetic bearings in flexible rotordynamic systems–A state-of-the-art review

RS Srinivas, R Tiwari, C Kannababu - Mechanical Systems and Signal …, 2018 - Elsevier
In this paper a critical review of literature on applications of Active Magnetic Bearings
(AMBs) systems in flexible rotordynamic systems have been presented. AMBs find various …

Design and modeling of a novel active squeeze film damper

HR Heidari, P Safarpour - Mechanism and Machine Theory, 2016 - Elsevier
Rotating machinery support design with the aim of reducing the amplitude vibration and
force transmitted to the foundation has significant importance regarding the various …

Influence of hydrodynamic thrust bearings on the nonlinear oscillations of high-speed rotors

I Chatzisavvas, A Boyaci, P Koutsovasilis… - Journal of Sound and …, 2016 - Elsevier
This paper investigates the effect of hydrodynamic thrust bearings on the nonlinear
vibrations and the bifurcations occurring in rotor/bearing systems. In order to examine the …

Application of gain-scheduled vibration control to nonlinear journal-bearing supported rotor

DS Alves, MF Wu, KL Cavalca - Journal of Sound and Vibration, 2019 - Elsevier
Bearing reaction forces are commonly approximated by linear coefficients at a given
rotational speed, although they are, in reality, considerably nonlinear in some situations …

Active rotordynamic stability control by use of a combined active magnetic bearing and hole pattern seal component for back-to-back centrifugal compressors

Q Li, W Wang, B Weaver, X Shao - Mechanism and Machine Theory, 2018 - Elsevier
Active control methods of rotordynamic stability for rotordynamic systems have been
developed for many years, however effectively implementing these methods in real …

Magnetic actuator control of oil whip instability in bearings

AS Dimitri, A El-Shafei, AA Adly… - IEEE Transactions on …, 2015 - ieeexplore.ieee.org
Magnetic actuators are successfully used in the control of rotating machinery using feedback
to eliminate the undesired vibration. Control algorithms can be implemented through the …

On the instability threshold of journal bearing supported rotors

RU Mendes, KL Cavalca - International Journal of Rotating …, 2014 - Wiley Online Library
Journal bearing supported rotors present two kinds of self‐excited vibrations: oil‐whirl and
oil‐whip. The first one is commonly masked by the rotor unbalance, hence being rarely …

Numerical and experimental modal control of flexible rotor using electromagnetic actuator

EH Koroishi, AS Borges, AA Cavalini Jr… - Mathematical …, 2014 - Wiley Online Library
The present work is dedicated to active modal control applied to flexible rotors. The
effectiveness of the corresponding techniques for controlling a flexible rotor is tested …

Robust control of flexible high-speed rotors via mixed uncertainties

B Riemann, MA Sehr, RS Schittenhelm… - 2013 European …, 2013 - ieeexplore.ieee.org
Active vibration control for flexible high-speed rotors tends to be a particularly challenging
problem due to the influence of gyroscopic terms, resulting in the need for speed-dependent …

Application of iterative machine learning for output tracking with magnetic soft actuators

N Banka, S Devasia - IEEE/Asme Transactions On …, 2018 - ieeexplore.ieee.org
This paper presents experimental results of output tracking for soft magnetic actuators using
iterative machine learning (IML) to estimate the model and its uncertainty. A challenge is that …