Toward the Application of an Embedded DSP for Seek/Spindle Servo of Optical Disk Drive

• Main Authors: Shi-Hsien-Liu, 劉世賢
• Other Authors: Jian-Shiang-Chen
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/71182190307660317056

碩士 === 國立清華大學 === 動力機械工程學系 === 91 === The objective of this thesis is to design a DSP/CPLD-based seeking and spindle servo control system for a DVD-Player，and to verify its performance via experiments. In seeking servo design，the modules which need fast multiplication and accumulation were realized in DSP，while the track counter and logic modules were realized in CPLD. Additionally，an active damper module is also designed for long-seek servo system to alleviate the vibratory motion of the pick-up-head while long-jump (1/3 of full stroke) is performed. In spindle servo design，the Phase-Locked-Loop (PLL) including data PLL and spindle PLL modules were realized in CPLD，and it is integrated with long-seek servo further. Constant Angular Velocity (CAV) mode and Constant Linear Velocity (CLV) mode were performed to verify the effectiveness of the integrated system. The experimental results have further shown the feasibility and effectiveness of the proposed schemes.