Journal of Institute of Control, Robotics and Systems (제어로봇시스템학회논문지)

Institute of Control, Robotics and Systems (제어로봇시스템학회)
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Improvement of the Transient Response by Partially Compensating Initial Values of Digital Controllers

디지털 제어기의 부분적 초기값 보상을 통한 천이 응답 특성 향상

  • 도태용 (한밭대학교 전자.제어공학과) ;
  • 류정래 (서울과학기술대학교 전기정보공학과)
  • Received : 2013.01.28
  • Accepted : 2013.03.21
  • Published : 2013.04.01
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Abstract

In switching from the track-seeking or track-jumping control mode to track-following control mode in hard disk drives or optical disk drives, initial values of the feedback controller are tuned to improve the transient response. In general, all the initial values of the controller have been compensated for this purpose. In this paper, by partially compensating initial values of digital controllers, we achieve a good performance of the transient response. In the proposed method for IVC (Intial Value Compensation), LMIs (Linear Matrix Inequalities) are used, which includes conditions for improving the performance of the transient response such as reducing a tracking error and control efforts. We obtain optimal initial values of the controller by solving an optimization problem with constraints represented by only one LMI. Although initial values of the controller are partially compensated, we can show that not only a sufficient performance of the transient response is obtained but also control efforts are diminished. The feasibility of the method is verified by simulation studies.

Keywords

References

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