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    Ramp-Load Dynamics of Proximity Recording Air Bearing Sliders in Magnetic Hard Disk Drive

    Source: Journal of Tribology:;1999:;volume( 121 ):;issue: 003::page 560
    Author:
    Yong Hu
    DOI: 10.1115/1.2834104
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: The revival of dynamic load/unload (L/UL) technology forces us to rethink the air bearing design philosophy, which has traditionally been established for contact start/stop applications. Reliably loading a slider onto a full-rotating disk imposes its own requirements on the slider air bearing designs. This paper addresses the unique design requirements of dynamic L/UL technology, through an investigation of the air bearing characteristics of two proximity recording sliders during a dynamic load process. While the slider/disk contact force is employed as a key indicator of the reliability of the dynamic load mechanism, the air bearing suction force and squeeze flow effect are used to characterize the slider’s dynamics during loading. The effects of the slider’s loading velocity, pitch and roll static attitudes on its dynamic load performance are simulated. In comparison to the positive pressure air bearings, both the enlarged air bearing surface and shallowly recessed cavities of the subambient pressure air bearing sliders generate more squeeze flow, resulting in a rapid development of the air bearing lifting force at a higher attitude. This often leads to a more reliable dynamic load performance. The impact of the air bearing suction force on the slider’s dynamics during loading is determined by the suction force center. A towards-leading-edge suction force not only induces a negative pitch motion during the early stage, but also prolongs the pitch-up process. Both effects can result in a head crash for the slider with a large negative pitch static attitude. In summary, the subambient pressure air bearing sliders that feature the enlarged leading air bearing surface and towards-trailing-edge suction cavities with small recess depth offer a fast pitch-up load performance.
    keyword(s): Dynamics (Mechanics) , Stress , Bearings , Disks , Force , Suction , Pressure , Flow (Dynamics) , Cavities , Mechanisms , Design , Motion , Reliability AND Bearing design ,
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      Ramp-Load Dynamics of Proximity Recording Air Bearing Sliders in Magnetic Hard Disk Drive

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    http://yetl.yabesh.ir/yetl1/handle/yetl/122886
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    • Journal of Tribology

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    contributor authorYong Hu
    date accessioned2017-05-09T00:01:00Z
    date available2017-05-09T00:01:00Z
    date copyrightJuly, 1999
    date issued1999
    identifier issn0742-4787
    identifier otherJOTRE9-28682#560_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/122886
    description abstractThe revival of dynamic load/unload (L/UL) technology forces us to rethink the air bearing design philosophy, which has traditionally been established for contact start/stop applications. Reliably loading a slider onto a full-rotating disk imposes its own requirements on the slider air bearing designs. This paper addresses the unique design requirements of dynamic L/UL technology, through an investigation of the air bearing characteristics of two proximity recording sliders during a dynamic load process. While the slider/disk contact force is employed as a key indicator of the reliability of the dynamic load mechanism, the air bearing suction force and squeeze flow effect are used to characterize the slider’s dynamics during loading. The effects of the slider’s loading velocity, pitch and roll static attitudes on its dynamic load performance are simulated. In comparison to the positive pressure air bearings, both the enlarged air bearing surface and shallowly recessed cavities of the subambient pressure air bearing sliders generate more squeeze flow, resulting in a rapid development of the air bearing lifting force at a higher attitude. This often leads to a more reliable dynamic load performance. The impact of the air bearing suction force on the slider’s dynamics during loading is determined by the suction force center. A towards-leading-edge suction force not only induces a negative pitch motion during the early stage, but also prolongs the pitch-up process. Both effects can result in a head crash for the slider with a large negative pitch static attitude. In summary, the subambient pressure air bearing sliders that feature the enlarged leading air bearing surface and towards-trailing-edge suction cavities with small recess depth offer a fast pitch-up load performance.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleRamp-Load Dynamics of Proximity Recording Air Bearing Sliders in Magnetic Hard Disk Drive
    typeJournal Paper
    journal volume121
    journal issue3
    journal titleJournal of Tribology
    identifier doi10.1115/1.2834104
    journal fristpage560
    journal lastpage567
    identifier eissn1528-8897
    keywordsDynamics (Mechanics)
    keywordsStress
    keywordsBearings
    keywordsDisks
    keywordsForce
    keywordsSuction
    keywordsPressure
    keywordsFlow (Dynamics)
    keywordsCavities
    keywordsMechanisms
    keywordsDesign
    keywordsMotion
    keywordsReliability AND Bearing design
    treeJournal of Tribology:;1999:;volume( 121 ):;issue: 003
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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