Sliding mode control of a rigid rotor via magnetic bearings

A. Sinha, K. L. Mease, K. W. Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Scopus citations


This paper deals with the sliding mode control of a rigid rotor supported by radial magnetic bearings. First, the control law is developed to be robust to external forces caused by the rotor unbalance and transient disturbances. This control law is then discretized for its implementation on a digital computer. Three methods are presented to determine the required coil current for each magnet. Next, an analytical technique has been developed to calculate the steady state amplitudes of the digital closed-loop system. Lastly, results from this analytical technique and numerical simulations are presented for the rotor operating at 30,000 rpm.

Original languageEnglish (US)
Title of host publication13th Biennial Conference on Mechanical Vibration and Noise
Subtitle of host publicationModal Analysis, Modeling, Diagnostics, and Control - Analytical and Experimental
PublisherAmerican Society of Mechanical Engineers (ASME)
Number of pages9
ISBN (Electronic)9780791806296
StatePublished - 1991
EventASME 1991 Design Technical Conferences, DETC 1991 - Miami, United States
Duration: Sep 22 1991Sep 25 1991

Publication series

NameProceedings of the ASME Design Engineering Technical Conference
VolumePart F168436-5


ConferenceASME 1991 Design Technical Conferences, DETC 1991
Country/TerritoryUnited States

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Computer Graphics and Computer-Aided Design
  • Computer Science Applications
  • Modeling and Simulation


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