서지주요정보
펄스 가진을 이용한 광 디스크 트랙킹 구동기의 검색 시간 단축 = Reducing seek time of tracking actuator with pulsed excitation in optical disk
서명 / 저자 펄스 가진을 이용한 광 디스크 트랙킹 구동기의 검색 시간 단축 = Reducing seek time of tracking actuator with pulsed excitation in optical disk / 임형준.
저자명 임형준 ; Lim, Hyung-Jun
발행사항 [대전 : 한국과학기술원, 1999].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8009549

소장위치/청구기호

학술문화관(문화관) 보존서고

MME 99066

휴대폰 전송

도서상태

이용가능

대출가능

반납예정일

초록정보

Recently, optical disk drives are demanded to a fast data processing with a small size. It is necessary that the performance of actuator and controller be improved for the fast reading or writing. Especially, controllers play an important role in reading the signal on tracks of an optical disk and getting over the limitation of the actuator. Controllers of the tracking direction can be separated into a track following controller and a track seek controller. And, the time consumption for the track seek is one of the essential index of the performance of an optical disk system. There are many techniques for the control of the velocity or acceleration in a fine tracking actuator and a coarse actuator in order to reduce the track seek time. First of all, the residual vibration of the fine actuator which is entrained on a coarse actuator is a fatal problem of the track seek and the track pull-in. In this paper, previous methods for reducing seek time were accomplished. But the perfect vibration reduction of the fine actuator has some limitations under the non-zero track eccentricity. Generally, the track eccentricity has the constant amplitude and the fixed frequency when the spindle motor rotates with CAV (Constant Angular Velocity). If the fine actuator has the same velocity with the track eccentricity when the coarse actuator stops, there would be no latency time for the track pull-in. Both a sinusoidal excitation and a pulsed excitation are proposed for the velocity generation of the fine actuator. And merits and demerits of two excitation methods are investigated by the simulation, experimental result and error analysis. Excitation of the fine actuator by the pulsed input has good performance in comparison with the sinusoidal excitation.

서지기타정보

서지기타정보
청구기호 {MME 99066
형태사항 vii, 74 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Hyung-Jun Lim
지도교수의 한글표기 : 김수현
지도교수의 영문표기 : Soo-Hyun Kim
학위논문 학위논문(석사) - 한국과학기술원 : 기계공학과,
서지주기 참고문헌 : p. 73-74
주제 광 디스크
트랙킹 구동기
트랙 검색
검색시간
펄스 가진
Optical disk
Tracking actuator
Track seek
Seek time
Pulsed excitation
QR CODE qr code