Stability analysis and robust control design on an AMB system

Arredondo, I.; Jugo, J.

doi:10.1109/cdc.2007.4434597

Cited by 10 publications

(4 citation statements)

References 4 publications

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“…The coupling between different radial degree of freedom (DOF) may exist as for an AMB-rotor system, which is caused by cross-coupling stiffness. 21 As a result, multivariable nature can be provoked as well. Even a small cross coupled stiffness can make the closed-loop system become unstable.…”

Section: Limitations On the Evaluation Criteriamentioning

confidence: 99%

Implementation of vibration and stability evaluation criteria for rotating machineries equipped with active magnetic bearings

Peng

Deng

et al. 2021

Advances in Mechanical Engineering

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Imbalance vibration is the main factor affecting the stability of rotating machineries equipped with active magnetic bearings (AMB). Accordingly, for safe and reliable operation, ISO 14839 standard sets out guidelines for measuring and evaluating the vibration and stability. However, technical approaches to realize fulfillment of the evaluation criteria have never been studied in theory. This paper presents insights of these criteria and proposes effective methods to simultaneously implement these evaluation criteria. Based on imbalance vibration model of AMB-rotor system, the theoretical connections between these evaluation indices are revealed. In order to obtain accurate vibration model of single-input single-output (SISO) AMB-rotor system, modal analysis is carried out and equivalent mass of SISO system is figured out. Afterwards, with the analysis of sensitivity function in theory, new indices of the evaluation criteria are proposed, which helps establish requirements of controller design and rotor balance quality. Finally, through experimental verification on a test rig, the limitations on the evaluation criteria can be negligible, and the proposed methods to simultaneously implement the evaluation criteria are validated.

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Section: Limitations On the Evaluation Criteriamentioning

confidence: 99%

Implementation of vibration and stability evaluation criteria for rotating machineries equipped with active magnetic bearings

Peng

Deng

et al. 2021

Advances in Mechanical Engineering

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“…Fujita et al [3] studied a loop-shaping H ∞ control of a magnetic bearing. In [4], a mixed-sensitivity H ∞ control was presented. In [3] and [4], rotors with a symmetric structure were considered.…”

Section: Introductionmentioning

confidence: 99%

“…In [4], a mixed-sensitivity H ∞ control was presented. In [3] and [4], rotors with a symmetric structure were considered. This enabled splitting the design into decoupled independent problems [4].…”

Section: Introductionmentioning

confidence: 99%

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Case study comparison of linear H<inf>∞</inf> loop-shaping design and signal-based H<inf>∞</inf> control

Jastrzębski

Hynynen

Смирнов

2009

2009 XXII International Symposium on Information, Communication and Automation Technologies

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This paper focuses on the design of a linear robust controller for a mechatronic system in the presence of real parametric and non-parametric frequency-dependent uncertainties. An H ∞ loop-shaping control design procedure is compared with a signal-based H ∞ control. The comparison of the robust controllers is carried out in the context of an active magnetic bearing rotor system. Experimental results demonstrate the better robust stability of the signal-based approach. A genetic algorithm is essential to credible comparison of different design approaches.

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