Wei, J., Liu, K. and Radice, G. (2017) Study on stability and rotating speed stable region of magnetically suspended rigid rotors using extended Nyquist criterion and gain-stable region theory. ISA Transactions, 66, pp. 154-163. (doi: 10.1016/j.isatra.2016.10.001)
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130660.pdf - Accepted Version 1MB |
Abstract
This paper presents a novel and simple method to analyze the absolute stability and the rotor speed stable region of a magnetically suspended rotor (MSR). At the beginning of the paper, a complex variable is introduced to describe the movement of the MSR and a complex coefficient transfer function is obtained accordingly. The equivalent stability relationship between this new variable and the two traditional deflection angles is also demonstrated in a simple way. The detailed characteristics of the open-loop MSR system with time delay are studied carefully based on the characteristics of its Nyquist curve. A sufficient and necessary condition of absolute stability is then deduced by using an extended complex Nyquist stability criterion for MSRs. Based on the relationship between the rotor speed and gain-stable region proposed in this paper, the rotor speed stable region can be solved simply and directly. The usefulness and effectiveness of the proposed approaches are validated by examples and simulations.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Radice, Dr Gianmarco |
| Authors: | Wei, J., Liu, K., and Radice, G. |
| College/School: | College of Science and Engineering > School of Engineering > Autonomous Systems and Connectivity |
| Journal Name: | ISA Transactions |
| Publisher: | Elsevier |
| ISSN: | 0019-0578 |
| ISSN (Online): | 1879-2022 |
| Published Online: | 13 October 2016 |
| Copyright Holders: | Copyright © 2016 ISA |
| First Published: | First published in ISA Transactions 66:154-166 |
| Publisher Policy: | Reproduced in accordance with the copyright policy of the publisher |
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