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Sensors 2018, 18(7), 2212; https://doi.org/10.3390/s18072212

Hopf Bifurcation and Vibration Control for a Thrust Magnetic Bearing with Variable Load Mass

1
Institute of Applied Mathematics and Intelligent Information Processing, Hunan Women’s University, Changsha 410004, China
2
School of Mechanical and Mechatronic Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia
Received: 25 May 2018 / Revised: 2 July 2018 / Accepted: 3 July 2018 / Published: 10 July 2018
(This article belongs to the Section Physical Sensors)
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Abstract

In the working process, the load mass of the thrust magnetic bearing has a significant change. If the load mass changes greatly, the original fixed control parameters cannot ensure that the system is in the optimal stable suspension state, and the performance of the system will become worse or even self-excited. Firstly, a single freedom degree of the suspension control system model is established, and the critical condition of the system is analyzed when a self-excited oscillation occurs. Then, a linear adaptive control law is proposed for the system with variable parameters, which can tolerate the wide range of load mass. The simulation results show that the adaptive control law can keep the stability of the system when the load mass varies in a large range and avoid the self-excited vibration. View Full-Text
Keywords: thrust magnetic bearing; hopf bifurcation; vibration control; variable mass; linear adaptive control thrust magnetic bearing; hopf bifurcation; vibration control; variable mass; linear adaptive control
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Zhang, L. Hopf Bifurcation and Vibration Control for a Thrust Magnetic Bearing with Variable Load Mass. Sensors 2018, 18, 2212.

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