• Title/Summary/Keyword: 루프 게인 조정

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A Robust Controller Design Method of the Fine Seek Control System with Velocity Disturbance (속도 성분의 진동 외란이 있는 미동 탐색 제어 시스템의 강인 제어기 설계 방법)

  • Lee, Moon-Noh;Shin, Jin-Ho;Kim, Seong-Woo
    • Transactions of the Korean Society for Noise and Vibration Engineering
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    • v.17 no.9
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    • pp.805-812
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    • 2007
  • This paper present a robust controller design method based on the estimation of velocity disturbance to construct a robust fine seek control system. A loop gain adjustment algorithm is introduced to accurately estimate the velocity disturbance in spite of the uncertainties of fine actuator. A weighting function is optimally selected from a minimum fine seek open-loop gain, calculated by estimating the velocity disturbance. A robust fine seek controller is designed by considering a robust $H_{\infty}$ control problem using the weighting function. The proposed controller design method is applied to the fine seek control system of a DVD rewritable drive and is evaluated through the experimental results.

Estimation of Tracking Vibration Quantity for an Optimal Tracking Controller Design (최적 트랙킹 제어기 설계를 위한 트랙킹 진동량 추정)

  • Lee, Moon-Noh;Jin, Kyoung-Bog;Lee, Jong-KeuK
    • Transactions of the Korean Society for Noise and Vibration Engineering
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    • v.15 no.5 s.98
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    • pp.578-585
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    • 2005
  • In this paper, we present a schematic method estimating the tracking vibration quantity occurring in the track-following system of an optical recording device. A tracking loop gain adjustment algorithm is introduced to estimate accurately the tracking vibration quantity in spite of the uncertainties of the tracking actuator, Accordingly, the tracking vibration quantity can be estimated from the tracking error, the controller output, the nominal actuator model, and a compensated gain. An optimal tracking controller can be designed from a minimum tracking open-loop gain calculated by the estimated tracking vibration quantity The proposed vibration quantity estimation and controller design method are applied to the track-following system of an optical recording device and are evaluated through the experimental result.