Reduction of Periodic Rotating Vibration Using the Repetitive Control in the Rotating Servo System

  • Zhao-Wei Zhong
Conference paper


In rotating servo systems, disturbances which cause rotor vibrations are often periodic. Repetitive control is useful in reducing such periodic rotating vibrations. However, the typical repetitive control has a peculiar weak point. The author tried to solve this problem by means of a new iterative learning compensator. To realise this proposed compensator, several methods including the use of Butterworth band-pass filters, infinite impulse response digital filters, and the fast Fourier transform technique were investigated. A numerical example was used, and numerical simulations were also carried out to confirm the effectiveness of the proposed method. The results proved that it is practical and useful to apply this repetitive control without deteriorating the controlled output of the rotating servo system at any frequency.


Fast Fourier Transform Control Output Servo System Disturbance Rejection Dynamic Compensator 
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7. References

  1. Gotou M, Matsubayashi S, Miyazaki F et al. (1987) A robust servo system with an iterative learning compensator and a proposal of multi-period learning compensator. Systems and Control, Vol.31, No.5:367–374Google Scholar
  2. Hara S (1986) Repetitive control. Jour. of SICE, Vol.25, No.12:1111–1119MathSciNetGoogle Scholar
  3. Hara S, Yamamoto Y, Omata T et al. (1988) Repetitive control system: a new type servo system for periodic exogenous signals. IEEE Trans. Automat. Contr., Vol.AC-26:659–667MathSciNetCrossRefGoogle Scholar
  4. Inoue T, Nakano M, Kubo T et al. (1980) High accuracy control for magnet power supply of proton synchrotron in recurrent operation. Trans. IEE Japan, Vol. 100, No.7:16–22Google Scholar

Copyright information

© Springer-Verlag London Limited 1992

Authors and Affiliations

  • Zhao-Wei Zhong
    • 1
  1. 1.Materials Fabrication Laboratory, The Institute of Physical and Chemical ResearchWako-shi, SaitamaJapan

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