A Model for a Hard Disk Drive for Vibration and Shock Analysis

We propose a model for a hard disk drive (HDD) based on a flexible multibody dynamics formulation. All the main components in the HDD, i.e., the spindle head actuator, spindle disk, and base are considered flexible components connected by bearing joints. The model takes into account nonlinearity and...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2008-12, Vol.44 (12), p.4764-4768
Main Authors: Mengjun Liu, Fook Fah Yap, Harmoko, H.
Format: Article
Language:English
Subjects:
Actuators
Air bearing
Analytical models
base stiffness
Computer crashes
Cross-disciplinary physics: materials science
rheology
Disk drives
Disks
Electric shock
Exact sciences and technology
Finite volume methods
flexible multibody dynamics
Flight
Fluid dynamics
hard disk drive
Hard disks
intermolecular force
Intermolecular forces
Magnetism
Materials science
Nonlinear dynamics
Nonlinear equations
Other topics in materials science
Physics
shock
Spindles
Springs
Tolerances
Vibration
Vibrations
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Summary:We propose a model for a hard disk drive (HDD) based on a flexible multibody dynamics formulation. All the main components in the HDD, i.e., the spindle head actuator, spindle disk, and base are considered flexible components connected by bearing joints. The model takes into account nonlinearity and discontinuity caused by the contact between the dimple and flexure. The air bearing force is obtained by solving the Reynolds equation using the finite volume method and considering Intermolecular force. We found that the intermolecular force will lower the flying height. We investigated the effect of the base stiffness on the shock tolerance of the HDD and found that a stiffer base will benefit the increase of the shock tolerance.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2008.2005137