Vibration and control of a flexible rotor in magnetic bearings using hybrid method and H control theory

Ting Nung Shiau, Geeng Jen Sheu, Ciann-Dong Yang

Research output: Contribution to journalConference articlepeer-review


The vibration and active control of a flexible rotor system with magnetic bearings is investigated using Hybrid Method (HM) and H control theory with consideration of gyroscopic effect. The hybrid method which combines the merits of finite element method (FEM) and generalized polynomial expansion method (GPEM) is employed to model the flexible rotor system with small order of plant. The mixed sensitivity problem of H control theory is applied to design the control of system vibration with spillover phenomena for the reduced order plant. The H2 control design is also employed for the comparison to the H design. The experimental simulation is used to illustrate the effects of control design. It is shown that the H controller design can be very effective to suppress spillover phenomena. In addition, H control design has robustness to the variation of the parameters of the model. The application of hybrid method (HM) together with H control design is highly recommended for the vibration control of flexible rotor system with magnetic bearings.

Original languageEnglish
Pages (from-to)1-7
Number of pages7
JournalAmerican Society of Mechanical Engineers (Paper)
Publication statusPublished - 1994 Jan 1
EventProceedings of the International Gas Turbine and Aeroengine Congress and Exposition - Hague, Neth
Duration: 1994 Jun 131994 Jun 16

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering


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