Vibration protection of laptop hard disk drives in harsh environmental conditions
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542_2016_3172_ReferencePDF.pdf
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800.79 KB
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Author(s)
Haji Hosseinloo, Ashkan
Date Issued
October 2016
Journal
Microsystem Technologies
Publisher
Springer-Verlag
Citation
Haji Hosseinloo, Ashkan. “Vibration Protection of Laptop Hard Disk Drives in Harsh Environmental Conditions.” Microsystem Technologies 23, 10 (October 2016): 4427–4433 © 2016 Springer-Verlag
Version
Author's final manuscript
Abstract
Ultra-portability and compact design of laptop computers have made them more vulnerable to harsh environments. Hard disk drives (HDDs) in particular, are critical components in laptop computers whose read/write performance is severely affected by excessive vibrations. Here we take a system-level approach to design an optimal vibration isolator so as to minimize the transmitted vibration to the HDD while the laptop chassis is confined within an allowable vibration travel. The laptop is modeled as a 3-dof lumped-parameter system and the base excitation is assumed Gaussian random vibration with zero mean and uniform power spectral density over the frequency range [0–2000] Hz. The problem is cast as a constrained optimization problem with two decision variables, namely isolation frequency and damping. A combination of analytical and numerical approaches is utilized to solve the constrained optimization problem. It is shown that the optimized isolation system could reduce the transmitted root-mean-square acceleration to the HDD by a factor of over four compared to a rigidly-mounted laptop. Furthermore, the methodology presented here is not case-specific and could be applied to the isolation system design of a wide range of systems.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
http://dx.doi.org/10.1007/s00542-016-3172-0
