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Tracking Performance Improvement of Optical Disk Drive System  

Kim Hong Rok (한양대학교 전자통신전파공학과)
Suh Il Hong (한양대학교 정보통신대학원)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers D / v.54, no.6, 2005 , pp. 372-375 More about this Journal
Abstract
The tracking performance of optical disk drive(ODD) system can be improved using disturbance observer(DOB). But, DOB was not easily applied in the ODD system because the additional microprocessor was needed. In this paper, we propose an error-based modified disturbance observer(EM-DOB) for ODD system. Due to the simplified structure of EM-DOB, the system is easily implemented to the digital control algorithm or the analog circuit. In these algorithms, disturbances rejection performance of system can be tuned as Q filter parameters are selected. Based on analysis of sensitivity function, three guidelines of Q filter design are suggested. Experimental results of DOB and EM-DOB are evaluated under the forced disturbances.
Keywords
Optical Disk Drive; Tracking Performance; Disturbance Observer; Q Filter; Sensitivity Function;
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Times Cited By KSCI : 3  (Citation Analysis)
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