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Robust Control pp 122-129 | Cite as

Experimental evaluation of H control for a flexible beam magnetic suspension system

  • Masayuki Fujita
  • Fumio Matsumura
  • Kenko Uchida
Conference paper
Part of the Lecture Notes in Control and Information Sciences book series (LNCIS, volume 183)

Abstract

An H robust controller is experimentally demonstrated on a magnetic suspension system with a flexible beam. The experimental apparatus utilized in this study is a simplified model of magnetic bearings with an elastic rotor. We first derive a suitable mathematical model of the plant by taking account of various model uncertainties. Next we setup the standard problem, where the generalized plant is constructed with frequency weighting functions. An iterative computing environment MATLAB is then employed to calculate the central controller. The techniques devised for the selection of design parameters involve both the game theoretic characterizations of the central controller in the time domain and the all-pass property of the closed loop transfer function in the frequency domain. Finally, the digital controller is implemented using a DSP μPD77230 where the control algorithm is written in the assembly language. Several experiments are carried out in order to evaluate the robustness and the performance of this H design. These experimental results confirm us that the flexible beam magnetic suspension system is robustly stable against various real parameter changes and uncertainties.

Keywords

Digital Signal Processor Central Controller Magnetic Bearing Assembly Language Flexible Beam 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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    K. Glover and J.C. Doyle, ‘State-space formulae for all stabilizing controllers that satisfy an H -norm bound and relations to risk sensitivity', Syst. Contr. Lett., vol. 11, no. 3, pp. 167–172, 1988.zbMATHCrossRefMathSciNetGoogle Scholar
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    M. Fujita, F. Matsumura, and M. Shimizu, ‘H robust control design for a magnetic suspension system,’ in Proc. 2nd Int. Symp. Magnetic Bearings, Tokyo, Japan, 1990.Google Scholar
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Copyright information

© Springer-Verlag 1992

Authors and Affiliations

  • Masayuki Fujita
    • 1
  • Fumio Matsumura
    • 2
  • Kenko Uchida
    • 2
  1. 1.Department of Electrical and Computer EngineeringKanazawa UniversityKanazawaJapan
  2. 2.Department of Electrical EngineeringWaseda UniversityTokyoJapan

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