Design and Analysis of the Focus Servo for Equalizer

• Main Author: 陳偉華
• Other Authors: Hong Yih Cheng
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/99344910936405450440

碩士 === 大葉大學 === 機電自動化研究所碩士班 === 93 === The present DVD-ROM drive on the market, only provide two pair of laser power to different reflex light intensity. Beside，the DVD-ROM drive use the FE signal to compensate the axial wobble (CD：±500μm，DVD：±300μm) which are caused by the rotating disk. The gain signal of the plant will be corrected during the automatic adjustment procedure when the DVD-ROM drive is starting. The thesis use the 16X DVD-ROM drive as the experiments to build the model of plant, try to analyze the FE signal and increase the tolerance of axial wobble(DVD：±500μm).We also figure out the new curve focus characteristics and use the Phase lag-lead equalizer the ways to adjust the parameter try to reach the standard of the system。