Improving the rotational and transient performance of magnetic bearings by the H DIA control

Toru Namerikawa, Hiroki Seto

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


This paper deals with an application of H control attenuating initial-state uncertainties to the magnetic bearing and examines the H control problem, which treats a mixed Disturbance and an Initial state uncertainty Attenuation (DIA) control. The mixed H DIA problem supplies H controls with good transients and assures H controls of robustness against initial-state uncertainty. On the other hand, active magnetic bearings allow contract-free suspension of rotors and they are used for various industrial purposes. We derive a mathematical model of the magnetic bearing which has complicated rotor dynamics and nonlinear magnetic property. Then we apply this proposed H DIA control for the magnetic bearing, and design a robust H controller both for exogenous disturbances and for initial state uncertainties of the plant. Experimental results show that the proposed robust control approach is effective for improving rotational performance, transient response and robust performance.

Original languageEnglish
Pages (from-to)2907-2912
Number of pages6
JournalProceedings of the American Control Conference
Publication statusPublished - 2005 Sept 1
Externally publishedYes
Event2005 American Control Conference, ACC - Portland, OR, United States
Duration: 2005 Jun 82005 Jun 10

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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