Sliding mode control for active magnetic bearing system with flexible rotor

Ming Jyi Jang, Chieh Li Chen, Yi Ming Tsao

Research output: Contribution to journalArticlepeer-review

64 Citations (Scopus)


This paper presents the analysis and control of active magnetic bearing (AMB) systems with a flexible rotor. A sliding mode controller design scheme is proposed to compensate for the nonlinear effects of the AMB system. A nonlinear model of the AMB system with an electromagnetic actuator and a flexible rotor is proposed to facilitate the present system analysis and controller design. This nonlinear model takes into account the dynamics of the flexible rotor, the characteristics of the nonlinear electromagnetic suspended system, and the contact force between the auxiliary bearing and the shaft. This study also considers the auto-centering control of the AMB system when subjected to disturbances and variations in the system parameters. The numerical results show that the system exhibits a periodic motion and demonstrates high accuracy and robustness when operating under sliding mode control.

Original languageEnglish
Pages (from-to)401-419
Number of pages19
JournalJournal of the Franklin Institute
Issue number4
Publication statusPublished - 2005 Jul

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Signal Processing
  • Computer Networks and Communications
  • Applied Mathematics


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