Transactions of the Korean Society for Noise and Vibration Engineering (한국소음진동공학회논문집)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Disturbance Analysis in an Optical Disk Drive Using Model Based Disturbance Observer and Waterfall Technique

모델 기반 외란 관측기와 Waterfall 해석을 이용한 광 디스크 외란 분석

  • Published : 2006.01.01
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Abstract

A novel disturbance measurement method, model based disturbance observer (MBDO) for optical disk drives (ODDs), is proposed and the disturbance analysis using the proposed method is performed under various conditions. In ODDs, the quantitative and qualitative analysis for the generated disturbance during normal operation is very important to successful servo loop design. However, the disturbance measurement is difficult, and high precision measurement is necessary. Furthermore, the conventional disturbance measurement method using a LDV (laser Doppler vibrometer) has many difficulties in eccentricity direction due to the vertical movement of an optical disk. To solve this problem, the MBDO is proposed. First, the relationship between the servo loop for ODDs and the generated disturbance are briefly reviewed. Second, the principle of the MBDO is introduced, and the disturbance measurement results, which are measured by the MBDO and a LDV, are compared. In these experiments, test DVD-ROM disks are used to generate quantitative/qualitative disturbance. Then, the disturbance analysis under various conditions is performed using waterfall technique. This technique clearly shows the disturbance trend from the inner part of an optical disk to the outer part of it. Finally, the various disturbances measurement results are summarized and some remarks for it are commented.

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References

  1. Lee, M.-N et al. 2004, 'Design of a Robust Track-following Controller for Optical Disk Drives', IEEE Transactions on Consumer Electronics, Vol. 50, No. 2, pp. 723-731 https://doi.org/10.1109/TCE.2004.1309454
  2. Lee, J. W., Chait, Y. and Steinbuch, M., 2000, 'On QFT Tuning of Multivariate ${\mu}$ Controllers', Automatica, Vol. 36, pp. 1701-1708 https://doi.org/10.1016/S0005-1098(00)00076-5
  3. Lim, S. and Jung, T. -Y., 1999, 'Dynamics and Robust Control of a High Speed Optical Pickup', Journal of Sound and Vibration, Vol. 221, No. 4, pp. 607-621 https://doi.org/10.1006/jsvi.1998.2042
  4. Choi, J. -Y. et al., 2002, 'Disturbance Measurement of an Optical Disk and the Servo Loop Design Related to This Result', MOVIC 2002, Japan
  5. Choi, J. Y., Chun, C. H., Jun, H. G., Lee, M. N., Yang, H. S. and Park, Y. P., 2001, Disturbance Estimation of Optical Disc by Closed Loop Output Estimator, Proceedings of the KSNVE Autumn Annual Conference, pp. 1166-1171
  6. Kim, Jin-seon and Kwak, Kyung-sup, 2002, 'A Study on Vibration Detection Method of Disc by Differential Amplifying Optical Power in Optical Disk Media', Journal of Korea Multimedia Society, Vol. 6, No. 2, pp. 215-221
  7. Lee, M. N., Jin, K. B. and Lee, J. K., 2005, 'Estimation of Tracking Vibration Quantity for an Optimal Tracking Controller Design', Transactions if the KSNVE, Vol.15, No. 5, pp. 578-585 https://doi.org/10.5050/KSNVN.2005.15.5.578
  8. Lee, Mun. No., Sin, J. H., and Kim, S. U., 2003, .Measurement of Velocity Disturbance for Robust Seek Control., Transactions of the KSNVE, Vol. 13, No. 11, pp. 860-867 https://doi.org/10.5050/KSNVN.2003.13.11.860
  9. Jin, W. H., Chung Jintai and Choi Keeyoung, 2003, 'Dynamic Time Response of a Flexible Spinning Disk Misaligned with The Axis of Rotation', Journal of Sound and Vibration, Vol. 2262, Issue. 1, pp. 25-44
  10. Lee, S. -Y., Chung Jintai and Choi Keeyoung, 2002, 'Critical and Flutter of Optical Disks', Microsystem Technologies, Vol. 8, No. 2-3, pp. 206-211 https://doi.org/10.1007/s00542-001-0147-5
  11. Kim, Sookyung, Han Gyuhyeon and Son Heuigi, 1998, 'A Study of Characteristics of Disk Vibration and Rotating Airflow in Magnetic of Optical Disk Drives', IEEE Transaction on Consumer Electronics, Vol. 44, No. 3, pp. 601-605 https://doi.org/10.1109/30.713169
  12. Kim, K. S. and Chung, Jintai, 2002. 'Dynamic Analysis of an Optical Disk Drive with an Automatic Ball Balancer', Transaction of the KSME A, Vol.26, No. 12, pp. 601-605
  13. Jang, G. H., Kim, D. K. and Han. J. H., 2001, .Characterization of NRRO in a HDD Spindle System Due to Ball Bearing Excitation., IEEE Transaction on Magnetics, Vol. 37, No. 2. pp. 815-819 https://doi.org/10.1109/20.917622
  14. Jia, Q. -W., Wang, Z. -F. and Wang, F. -C, 2005, 'Repeatable Runout Disturbance Compensation with a New Data Collection Method for Hard Disk Drive', IEEE Transaction on Magnetics, Vol. 41, No. 2, pp. 791-796 https://doi.org/10.1109/TMAG.2004.840323