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An enhanced dynamic simulation model of a hybrid magnetic bearing taking account of the sensor noise

An enhanced dynamic simulation model of a hybrid magnetic bearing taking account of the sensor noise
An enhanced dynamic simulation model of a hybrid magnetic bearing taking account of the sensor noise

The paper presents simulation and experimental verification of the hybrid magnetic bearing (HMB) performance characteristics. It has been demonstrated that the additional errors from the eddy current sensors have a significant impact on the control signals. An improved mathematical model combines a nonlinear magnetic equivalent circuit of the HMB with the ordinary differential equations of its transients. These equations describe the rotor motion and the electric circuit of the system, as well as the control system required for stable levitation of the rotor. Certain harmonics have been observed in the displacement signals of frequencies equal to the multiples of the cylinder rotations. The calculation model has, therefore, been improved, taking into account the interference of the harmonics. Simulation results were validated by comparing the time responses of the transients obtained from the numerical calculations with those measured on a real object; a satisfactory agreement between the results has been achieved.

Hybrid magnetic bearing, Nonlinear magnetic equivalent circuit, Sensor noise, Simulation model
1424-8220
Wajnert, Dawid
d3e007e2-17e5-44f0-8331-2c7464f008ff
Sykulski, Jan K.
d6885caf-aaed-4d12-9ef3-46c4c3bbd7fb
Tomczuk, Bronislaw
bd54295c-b06e-4209-891b-40113f973991
Wajnert, Dawid
d3e007e2-17e5-44f0-8331-2c7464f008ff
Sykulski, Jan K.
d6885caf-aaed-4d12-9ef3-46c4c3bbd7fb
Tomczuk, Bronislaw
bd54295c-b06e-4209-891b-40113f973991

Wajnert, Dawid, Sykulski, Jan K. and Tomczuk, Bronislaw (2020) An enhanced dynamic simulation model of a hybrid magnetic bearing taking account of the sensor noise. Sensors (Switzerland), 20 (4), [1116]. (doi:10.3390/s20041116).

Record type: Article

Abstract

The paper presents simulation and experimental verification of the hybrid magnetic bearing (HMB) performance characteristics. It has been demonstrated that the additional errors from the eddy current sensors have a significant impact on the control signals. An improved mathematical model combines a nonlinear magnetic equivalent circuit of the HMB with the ordinary differential equations of its transients. These equations describe the rotor motion and the electric circuit of the system, as well as the control system required for stable levitation of the rotor. Certain harmonics have been observed in the displacement signals of frequencies equal to the multiples of the cylinder rotations. The calculation model has, therefore, been improved, taking into account the interference of the harmonics. Simulation results were validated by comparing the time responses of the transients obtained from the numerical calculations with those measured on a real object; a satisfactory agreement between the results has been achieved.

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Accepted/In Press date: 14 February 2020
Published date: 18 February 2020
Keywords: Hybrid magnetic bearing, Nonlinear magnetic equivalent circuit, Sensor noise, Simulation model

Identifiers

Local EPrints ID: 443688
URI: http://eprints.soton.ac.uk/id/eprint/443688
ISSN: 1424-8220
PURE UUID: f3245abc-7f4a-43cd-b573-38bbb8b6dae0
ORCID for Jan K. Sykulski: ORCID iD orcid.org/0000-0001-6392-126X

Catalogue record

Date deposited: 09 Sep 2020 16:30
Last modified: 07 Oct 2020 02:31

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Contributors

Author: Dawid Wajnert
Author: Jan K. Sykulski ORCID iD
Author: Bronislaw Tomczuk

University divisions

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