Error control processing method for CD drive track-finding servo

At starting action for making optical header Track On, that is at time of changing Seeking Sevo system to Tracking Sevo system to control optical header, the Track On time begins to calculate. If the Track On time exceeds a preset time, action for making optical header Track On is quit. Next, activa...

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Bibliographic Details
Main Authors ZHANGYU XU, DUNJIE LI, XIANGYI FU
Format Patent
LanguageChinese
English
Published 30.06.2004
Edition7
Subjects
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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Summary:At starting action for making optical header Track On, that is at time of changing Seeking Sevo system to Tracking Sevo system to control optical header, the Track On time begins to calculate. If the Track On time exceeds a preset time, action for making optical header Track On is quit. Next, activating central servo control system or vibrating the optical header in free frequency makes the optical header move to central position within movable region. Then, another Track On action is carried out. 本发明提出一种光驱寻轨伺服的错误控制处理方法，本发明是在光学头锁轨(Track On)动作开始时，亦即光学头的控制由寻轨伺服(Seeking Servo)系统切换至循轨伺服(Tracking Servo)系统时，开始计算锁轨时间。当锁轨时间超过一预期时间，即放弃光学头的锁轨动作。接着，激活中央伺服控制系统或让光学头以自然频率摆动，使得光学头移至可移动范围的中央位置后，再进行另一次锁轨动作。
Bibliography:Application Number: CN2002157813