Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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A Study of Improving Stability of a System with Perturbed Controller

섭동이 있는 제어기를 갖는 시스템의 안정도 향상에 관한 연구

  • Cha, Young-Ho (Soongsil Univ. Electrical Eng. Automatic Control Lab.) ;
  • Chung, Tea-Jin (Soongsil Univ. Electrical Eng. Automatic Control Lab.) ;
  • Chung, Chan-Soo (Soongsil Univ. Electrical Eng. Automatic Control Lab.)
  • 차영호 (숭실대학교 대학원 전기공학과 자동제어연구실) ;
  • 정태진 (숭실대학교 대학원 전기공학과 자동제어연구실) ;
  • 정찬수 (숭실대학교 대학원 전기공학과 자동제어연구실)
  • Published : 1998.11.28
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Abstract

This paper designs a robust controller with improved stability of a system. Robust control theory has been developed by many researchers. The controller derived in that using robust control theory has an assumption that it will be exactly implementation. But, It is very hard because of truncation errors, D-A, A-D transformation, and finite resolution, etc. Such perturbations would make problems in the stability of the system. Recently, Keel's paper presents some examples which shows controllers based on the robust controller design method are very fragile on its own perturbation. In this paper, we try to improve the stability of the closed-loop system in which there exist perturbation in the plant as well as in the controller. The results shows that the stability is improved and the performance is still satisfied.

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