Improvement of dynamic characteristics for optical pickup actuator using sensitivity analysis

K. T. Lee, D. J. Lee, No Cheol Park, Y. P. Park

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The disk rotation speed of optical disk drives (ODD) has been increasing rapidly to achieve high data transfer rates. High servo bandwidths for focusing and tracking actuator are required to follow dynamic disturbance by high rotation speed in ODD. However, the servo bandwidth is significantly limited by some vibration modes which are induced by the flexibility of the moving part. In this work, the vibration modes affecting the bandwidth of actuators are shifted to high frequency range and suppressed by modifying the FE model which is used to analyze the motion of the actuator. Some local dimensions of the lens holder, which is included in the moving part, are selected as design variables to increase the stiffness without changing the material properties. Selected modal frequencies of the moving part are raised about 10%, while the performances of actuator such as DC and AC sensitivities are hardly affected by the modification.

Original languageEnglish
Pages (from-to)25-30
Number of pages6
JournalMicrosystem Technologies
Volume9
Issue number1-2
DOIs
Publication statusPublished - 2003 Dec 1

Fingerprint

Pickups
sensitivity analysis
dynamic characteristics
Sensitivity analysis
Actuators
actuators
optical disks
sensors
bandwidth
Bandwidth
vibration mode
Data transfer rates
holders
Lenses
stiffness
Materials properties
alternating current
flexibility
disturbances
frequency ranges

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Hardware and Architecture
  • Electrical and Electronic Engineering

Cite this

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abstract = "The disk rotation speed of optical disk drives (ODD) has been increasing rapidly to achieve high data transfer rates. High servo bandwidths for focusing and tracking actuator are required to follow dynamic disturbance by high rotation speed in ODD. However, the servo bandwidth is significantly limited by some vibration modes which are induced by the flexibility of the moving part. In this work, the vibration modes affecting the bandwidth of actuators are shifted to high frequency range and suppressed by modifying the FE model which is used to analyze the motion of the actuator. Some local dimensions of the lens holder, which is included in the moving part, are selected as design variables to increase the stiffness without changing the material properties. Selected modal frequencies of the moving part are raised about 10{\%}, while the performances of actuator such as DC and AC sensitivities are hardly affected by the modification.",
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Improvement of dynamic characteristics for optical pickup actuator using sensitivity analysis. / Lee, K. T.; Lee, D. J.; Park, No Cheol; Park, Y. P.

In: Microsystem Technologies, Vol. 9, No. 1-2, 01.12.2003, p. 25-30.

Research output: Contribution to journalArticle

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