Experiments on the Vibration Control of Flexible Rotor Using Shear Mode MR Elastomer Damper

A shear mode magnetorheological (MR) elastomer damper is designed and manufactured, in which the MR elastomer is made by mixing RTV silicone, carbonyl iron particles and silicone oil, and solidifying under magnetic field. A flexible cantilever rotor system with single disk is constructed, and the controllability, effectiveness and stability of vibration control for the imbalance response of the rotor system using the MR damper are experimentally studied. From the test, it is found that as the strength of applied magnetic field increases, the damping and stiffness of the damper are increased; the critical speeds of the rotor system supported on the MR damper is increased distinctly, and the vibration at two critical speeds are restrained; the on-off control method may be used to control the rotor vibration while passing through the two critical speeds. The study shows that the shear mode MR elastomer damper is suitable for active vibration control of flexible rotor.

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Study of the Vibration Control of a Rotor System Using a Magnetorheological Fluid Damper

Journal of Vibration and Control ◽

10.1177/1077546305049481 ◽

2005 ◽

Vol 11 (2) ◽

pp. 263-276 ◽

Cited By ~ 16

Author(s):

J. Wang ◽

G. Meng

Keyword(s):

Magnetic Field ◽

Vibration Control ◽

Control Method ◽

Rotor System ◽

Shear Mode ◽

Rotor Vibration ◽

Mr Fluid ◽

Critical Speeds ◽

Fluid Damper ◽

Mr Fluid Damper

A shear mode magnetorheological (MR) fluid damper used for rotor vibration control is designed and manufactured, and the theoretical model of a cantilevered rotor system with the MR fluid damper is established. The response properties of the rotor system are studied theoretically and experimentally. It is found from the study that the Coulomb friction of the damper is increased as the magnetic field strength applied to the MR fluid increases. As a result, the vibration amplitude of the rotor system supported by the MR damper is decreased near the undamped critical speeds, but is increased in a rotating speed range between the first and the second undamped critical speeds. At the same time, the damped critical speed of the rotor system is increased with the increase of the applied magnetic field. Based on these characteristics, a simple on-off control method is used to suppress the rotor vibration across the critical speeds, and the results show that the method is very effective.

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Experimental Study on Vibration Properties and Control of Squeeze Mode MR Fluid Damper-Flexible Rotor System

Volume 5: 19th Biennial Conference on Mechanical Vibration and Noise, Parts A, B, and C ◽

10.1115/detc2003/vib-48416 ◽

2003 ◽

Cited By ~ 2

Author(s):

Jianxiao Wang ◽

Guang Meng ◽

Eric Hahn

Keyword(s):

Vibration Control ◽

Control Method ◽

Rotor System ◽

Flexible Rotor ◽

Mr Fluid ◽

Oil Film ◽

Critical Speeds ◽

Fluid Damper ◽

Mr Fluid Damper ◽

And Control

A squeeze mode MR fluid damper used for rotor vibration control is designed and manufactured, and the unbalance response properties and control method of a single-disk flexible rotor system supported by the damper are studied experimentally. It is found from the study that the magnetic pull force can decrease both the first critical speed and the critical amplitude; the oil film reaction force can decrease the amplitude at the undamped critical speeds, but increase the amplitude in a speed range between two undamped critical speeds. For the rotor system supported by a journal bearing and an MR fluid damper, it is possible to appear oil film instability as the increasing of the control current. The damper may have the best effect to make the vibration minimize within the range of all working speed by using on-off control method. The research show that the squeeze mode MR fluid damper has the advantages such as simple structure, clearly effectiveness, quick response, etc., and this kind of damper has a promising potential future in vibration control of flexible rotor systems.

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Active Vibration Control of a Non-collocated AMBs Flexible Rotor System to Pass the First Bending Critical Speed

2019 22nd International Conference on Electrical Machines and Systems (ICEMS) ◽

10.1109/icems.2019.8922473 ◽

2019 ◽

Author(s):

Peipei Wang ◽

Changsheng Zhu

Keyword(s):

Vibration Control ◽

Critical Speed ◽

Active Vibration Control ◽

Rotor System ◽

Flexible Rotor ◽

Active Vibration

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Active vibration control of flexible rotor supported by active control bearings (1st report, Quasi-model control method and comparison with optimal control method.

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C ◽

10.1299/kikaic.54.579 ◽

1988 ◽

Vol 54 (499) ◽

pp. 579-586 ◽

Cited By ~ 1

Author(s):

Kenzou NONAMI

Keyword(s):

Optimal Control ◽

Vibration Control ◽

Active Control ◽

Control Method ◽

Active Vibration Control ◽

Flexible Rotor ◽

Optimal Control Method ◽

Model Control ◽

Active Vibration

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Comparison of Active and Hybrid Vibration Confinement With Conventional Active Vibration Control

Volume 7B: 17th Biennial Conference on Mechanical Vibration and Noise ◽

10.1115/detc99/vib-8303 ◽

1999 ◽

Author(s):

Lawrence R. Corr ◽

William W. Clark

Keyword(s):

Vibration Control ◽

Control Method ◽

Numerical Study ◽

Active Vibration Control ◽

Piezoelectric Actuators ◽

Control Technique ◽

Flexible Beam ◽

Velocity Feedback ◽

Active Vibration ◽

Piezoelectric Actuators And Sensors

Abstract This paper presents a numerical study in which active and hybrid vibration confinement is compared with a conventional active vibration control method. Vibration confinement is a vibration control technique that is based on reshaping structural modes to produce “quiet areas” in a structure as opposed to adding damping as in conventional active or passive methods. In this paper, active and hybrid confinement is achieved in a flexible beam with two pairs of piezoelectric actuators and sensors and with two vibration absorbers. For comparison purposes, active damping is achieved also with two pairs of piezoelectric actuators and sensors using direct velocity feedback. The results show that both approaches are effective in controlling vibrations in the targeted area of the beam, with direct velocity feedback being slightly more cost effective in terms of required power. When combined with passive confinement, however, each method is improved with a significant reduction in required power.

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