Vibration protection of laptop hard disk drives in harsh environmental conditions
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 app...
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| Format: | Article |
| Language: | English |
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Springer-Verlag
2017
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| Online Access: | http://hdl.handle.net/1721.1/111582 https://orcid.org/0000-0002-1167-1075 |
| _version_ | 1826189335827841024 |
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| author | Haji Hosseinloo, Ashkan |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Haji Hosseinloo, Ashkan |
| author_sort | Haji Hosseinloo, Ashkan |
| collection | MIT |
| description | 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. |
| first_indexed | 2024-09-23T08:13:28Z |
| format | Article |
| id | mit-1721.1/111582 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T08:13:28Z |
| publishDate | 2017 |
| publisher | Springer-Verlag |
| record_format | dspace |
| spelling | mit-1721.1/1115822022-09-23T11:44:57Z Vibration protection of laptop hard disk drives in harsh environmental conditions Haji Hosseinloo, Ashkan Massachusetts Institute of Technology. Department of Mechanical Engineering Haji Hosseinloo, Ashkan 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. 2017-09-18T14:35:41Z 2017-09-18T14:35:41Z 2016-10 2016-08 2017-09-15T04:45:29Z Article http://purl.org/eprint/type/JournalArticle 0946-7076 1432-1858 http://hdl.handle.net/1721.1/111582 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 https://orcid.org/0000-0002-1167-1075 en http://dx.doi.org/10.1007/s00542-016-3172-0 Microsystem Technologies 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. Springer-Verlag Berlin Heidelberg application/pdf Springer-Verlag Springer Berlin Heidelberg |
| spellingShingle | Haji Hosseinloo, Ashkan Vibration protection of laptop hard disk drives in harsh environmental conditions |
| title | Vibration protection of laptop hard disk drives in harsh environmental conditions |
| title_full | Vibration protection of laptop hard disk drives in harsh environmental conditions |
| title_fullStr | Vibration protection of laptop hard disk drives in harsh environmental conditions |
| title_full_unstemmed | Vibration protection of laptop hard disk drives in harsh environmental conditions |
| title_short | Vibration protection of laptop hard disk drives in harsh environmental conditions |
| title_sort | vibration protection of laptop hard disk drives in harsh environmental conditions |
| url | http://hdl.handle.net/1721.1/111582 https://orcid.org/0000-0002-1167-1075 |
| work_keys_str_mv | AT hajihosseinlooashkan vibrationprotectionoflaptopharddiskdrivesinharshenvironmentalconditions |