Shock response analysis of optical disk drives considering main base and pick-up actuator using linear drop test and tilt drop test

Young-Bae Chang; Eun-Jung Shin; No-Cheol Park; Young-Pil Park

doi:10.1117/12.649825

15 September 2005 Shock response analysis of optical disk drives considering main base and pick-up actuator using linear drop test and tilt drop test

Young-Bae Chang, Eun-Jung Shin, No-Cheol Park, Young-Pil Park

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Proceedings Volume 5966, Seventh International Symposium on Optical Storage (ISOS 2005); 596624 (2005) https://doi.org/10.1117/12.649825
Event: Seventh International Symposium on Optical Storage (ISOS 2005), 2005, Zhanjiang, China

Abstract

The optical disk drive with more robustness against shock has been rarely studied. This research shows the shock response analysis of conventional optical disk drive. Main base of the optical disk drive is described with the motion of bouncing, pitching, and rolling. The entire model includes pick-up actuator. Finite element model of the entire system is made by ANSYS. And the lumped parameter model is made, which will replace the finite element model. Shock response of finite element model is compared with that of the lumped parameter model. Their shapes and magnitudes are the same. Therefore, the lumped parameter model can replace the finite element model. The lumped parameter model has advantages of cost and time over the finite element model. Linear drop test and tilt drop test are made in order to verify our shock model. Accelerometer is used for detecting input acceleration. Laser Doppler vibrometer is used for measuring the motion of the main base and pick-up actuator. Then experimental result is compared with the shock response of lumped parameter model. Their shapes are much the same. Therefore, the lumped parameter model of the optical disk drives can represent the real system.

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Young-Bae Chang, Eun-Jung Shin, No-Cheol Park, and Young-Pil Park "Shock response analysis of optical disk drives considering main base and pick-up actuator using linear drop test and tilt drop test", Proc. SPIE 5966, Seventh International Symposium on Optical Storage (ISOS 2005), 596624 (15 September 2005); https://doi.org/10.1117/12.649825

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KEYWORDS

Motion models

Actuators

Optical discs

Finite element methods

Motion measurement

Analytical research

Doppler effect

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