Dissertation/ Thesis
None
| العنوان: | None |
|---|---|
| Alternate Title: | 光碟機主軸馬達偏心運轉導致讀取誤差之伺服控制研究 |
| المؤلفون: | Yong-hong Lin, 林永泓 |
| Thesis Advisors: | Min-chun Pan, 潘敏俊 |
| سنة النشر: | 2009 |
| المجموعة: | National Digital Library of Theses and Dissertations in Taiwan |
| الوصف: | 97 In the trend of increasing data storage density of the optical disc and reading rate of the DVD drives, it’s necessarily to improve accuracy of servo control system and raise rotation speed of spindle motor. The spindle motor which derives disc easily causes strong vibration in high speed for eccentricity of spindle motor and disc. There are automatic ball balancing, rubber damper and lead-lag control in the optical disc devices to reduce focusing and tracking error caused by vibration. The automatic ball balancing is capability to eliminate radial vibrations under the conditions that eccentricity, damping and friction are not present for spindle motor. The damper absorber only suppress vibration at a specific frequency and difficult to overcome the focusing and tracking error for the harmonic vibration. The servo control of the optical disc drives controls a voice coil motor which moves an optical pick up head to accurate data track. The strong vibration causes focusing and tracking error arising over the allowed range and leads spindle motor to decrease rotation speed for pick up data. In the study, the senseless adaptive feedforward control (AFC) which uses RVSS-FXLMS algorithm aids the original servo control system of DVD drives for improving reading performance. The experiment results demonstrate the senseless AFC can successfully eliminate focusing and tracking error arising form the eccentricity of the spindle and overcome the rotation speed is decreased in the strong vibration. |
| Original Identifier: | 097NCU05489113 |
| نوع الوثيقة: | 學位論文 ; thesis |
| وصف الملف: | 77 |
| الاتاحة: | http://ndltd.ncl.edu.tw/handle/59327354271123329528 |
| رقم الانضمام: | edsndl.TW.097NCU05489113 |
| قاعدة البيانات: | Networked Digital Library of Theses & Dissertations |
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