Improving the transient response of magnetic bearings by the H∞ DIA control

Wataru Shinozuka, Toru Namerikawa

Research output: Contribution to conferencePaperpeer-review

2 Citations (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 transient response and robust performance.

Original languageEnglish
Number of pages6
Publication statusPublished - 2004 Dec 1
Externally publishedYes
Event2004 IEEE International Conference on Control Applications - Taipei, Taiwan, Province of China
Duration: 2004 Sept 22004 Sept 4


Other2004 IEEE International Conference on Control Applications
Country/TerritoryTaiwan, Province of China

ASJC Scopus subject areas

  • Engineering(all)


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