Vibration Suppression of the Rotating Shaft using the Axial Control of the Repulsive Magnetic Bearing

Inoue, Tsuyoshi; Sugai, Tomohiro; Ishida, Yukio

doi:10.1299/jsdd.4.575

Cited by 8 publications

(4 citation statements)

References 19 publications

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“…The equations of motion given in (10), (12), (14), (20), and (21) are derived according to the centre of mass of the flywheel. Since the repulsive bearings in the radial directions are stable, only the axial direction will be controlled by an AMB.…”

Section: Transform Of Equationsmentioning

confidence: 99%

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Novel repulsive magnetic bearing flywheel system with composite adaptive control

Başaran

Sivrioğlu

2019

IET Electric Power Applications

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Here, a novel flywheel structure is proposed with passive permanent magnet (PM) bearings in the radial and axial directions and an active magnetic bearing (AMB) in the axial direction. In the proposed structure, passive magnetic bearings do not provide a stable magnetic levitation in all directions, but it is possible to maintain the dynamic stability of the flywheel by using AMB in the axial direction. In the proposed bearing structure, radial repulsive magnetic bearings (RMBs) reduce the power consumption with less complexity in the bearing structure but impose disturbance forces that deteriorate the stability of the actively controlled flywheel system. A complete model of the flywheel system is derived and transformed for a control design. A Lyapunov-based composite adaptive feedback control is designed for maintaining the stability under disturbances and a close convergence to the desired trajectory with fast parameter estimation. The performance of the composite adaptive control was experimentally verified for different cases using the RMB flywheel system. Additionally, a PID control was experimentally verified to demonstrate the usefulness of parameter estimation.

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Section: Transform Of Equationsmentioning

confidence: 99%

“…On the other hand, AMBs consume energy and need a feedback control in operation. An RMB uses repulsive magnetic force generated by PMs for a magnetic levitation [13][14][15][16][17]. According to the Earnshaw theorem, a stable magnetic levitation is impossible in a system composed solely of PMs.…”

Section: Introductionmentioning

confidence: 99%

Novel repulsive magnetic bearing flywheel system with composite adaptive control

Başaran

Sivrioğlu

2019

IET Electric Power Applications

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“…Sugai et al (127) studied the nonlinear spring characteristics of a repulsive magnetic bearing, especially, about the effect of the length and the axial displacement of magnet. Inoue et al (128) discussed a vibration suppression method in a repulsive magnetic bearing. They controlled the axial position of the inner ring relative to the outer ring.…”

Section: Magnetic Bearingmentioning

confidence: 99%

Review of Research on Nonlinear Rotordynamics in Japan

Ishida

2013

JSDD

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This article introduces research on nonlinear rotordynamics in Japan. In most cases, the nonlinearity treated there was weak and it was approximated by a power series of low order. Firstly, the research on various nonlinear resonances due to the weak nonlinearity is introduced. Next, those on more complicated nonlinear phenomena, such as entrainment, internal resonances, chaotic vibrations, nonstationary vibrations, and more complicated systems, such as cracked rotors and continuous rotors, are explained. Then, research on phenomena due to strong nonlinearity is introduced. Various vibration suppression methods where the nonlinearity plays an important role are also explained. Finally, studies on the models representing helicopters and wind turbines are explained.

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“…The influence of the axial control of the RMB on the vibration characteristics is studied. Next, the vibration suppression by controlling the axial displacement of the RMB as the function of the rotational speed is proposed and investigated (Inoue et al, 2009b). Finally, the vibration suppression effect of the proposed method is also validated experimentally.…”

Section: Introductionmentioning

confidence: 99%

Vibration suppression of the rotor system using both a ball balancer and axial control of the repulsive magnetic bearing

Inoue

Niimi

Ishida

2010

Journal of Vibration and Control

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In this paper we describe a strategy to eliminate the disadvantages of both a ball balancer and a repulsive magnetic bearing through the simultaneous application of both to a rotor system. The resultant force of the magnetic synchronous force caused by the repulsive magnetic bearing and the unbalance force is cancelled by the ball balancer, and the vibration during the passage through the critical speed caused by the ball balancer is also reduced by the axial control of the repulsive magnetic bearing. As a result, both the vibration suppression during the passage through the critical speed and the vibration reduction to zero at the rotational speed range above the critical speed are achieved simultaneously. The vibration suppression effect of the proposed method is also validated experimentally.

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Vibration Suppression of the Rotating Shaft using the Axial Control of the Repulsive Magnetic Bearing

Cited by 8 publications

References 19 publications

Novel repulsive magnetic bearing flywheel system with composite adaptive control

Novel repulsive magnetic bearing flywheel system with composite adaptive control

Review of Research on Nonlinear Rotordynamics in Japan

Vibration suppression of the rotor system using both a ball balancer and axial control of the repulsive magnetic bearing

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