서지주요정보
가변 주기를 갖는 외란 제거를 위한 반복 제어를 기반한 트랙 추종 서보 시스템 = Repetitive control based track following servo system for rejection of disturbance with varying period
서명 / 저자 가변 주기를 갖는 외란 제거를 위한 반복 제어를 기반한 트랙 추종 서보 시스템 = Repetitive control based track following servo system for rejection of disturbance with varying period / 김종섭.
저자명 김종섭 ; Kim, Jong-Seob
발행사항 [대전 : 한국과학기술원, 2003].
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소장정보

등록번호

8014110

소장위치/청구기호

학술문화관(문화관) 보존서고

MEE 03025

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초록정보

In this thesis, an enhanced repetitive control is handled to apply to the track-following servo system of optical disk drives. For read / write operation in optical disk drives, the laser spot should be positioned on a target track which oscillates in the radial direction of a disk. The oscillation is originated from unavoidable eccentricity of the disk and regarded as an external disturbance whose period is related to the rotational speed of disk. Therefore, disturbance rejection is the major concern in the track-following servo system. Among various auxiliary controllers, repetitive control has been successfully utilized as an effective control algorithm for rejection of a periodic disturbance with an assumption that the delay constant is exactly set to a known constant period of disturbance. However, the disk rotation controlled in the constant linear velocity mode results in slow variation of the rotational speed of disk, which leads to varying period of the external disturbance. Therefore, it is required to adjust the delay constant to the exact period of disturbance to overcome the inherent drawback of the repetitive controller. As a remedy to get rid of the frequency-sensitivity, we propose a modified repetitive control structure to adjust the delay constant by measuring the rotational speed, which is directly related to disk rotation. The proposed method has been applied to simulations and experiments using a DSP-based digital control system, and some results are presented to show the validity. In addition, the relationship between measurement error of the rotational speed and tolerable error bound of the delay constant is analyzed based on the results.

서지기타정보

서지기타정보
청구기호 {MEE 03025
형태사항 vi, 57 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Jong-Seob Kim
지도교수의 한글표기 : 정명진
지도교수의 영문표기 : Myung-Jin Chung
학위논문 학위논문(석사) - 한국과학기술원 : 전기및전자공학전공,
서지주기 참고문헌 : p. 55-57
주제 트랙킹 서보 시스템
반복 제어
가변 주기
광 디스크 드라이브
tracking servo system
repetitive control
varying period
optical disk drive
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