Dynamic investigation and adaptive tracking-error improvement of optical disk drives

Min Chun Pan, Min Der Wu

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


The ignorant action to stick labels on optical disks for noting can make a severe imbalance problem. The study investigates the dynamic characteristics of a rotating optical disk at a varying speed through vibro-acoustic excitation. The disk imbalancing modulated with its resonant frequencies can be evidently observed by computed spectrograms. Then vibration disturbance at the critical speed is interpreted. Reductions on tracking errors and improvement on tracking performance are performed. An adaptive feedforward cancellation (AFC) scheme associated with the existing tracking servo through the feedback controller is implemented to cancel the disturbance effectively. Experimental results show the AFC apparently suppresses the tracking errors arising from the imbalancing of rotating disks.

Original languageEnglish
Pages (from-to)333-339
Number of pages7
JournalJournal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers, Series C/Chung-Kuo Chi Hsueh Kung Ch'eng Hsuebo Pao
Issue number4
StatePublished - Aug 2008


  • Adaptive feedforward cancellation
  • Imbalancing
  • Optical disc drive
  • Tracking-error improvement


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