Dynamics of Read/Write Head Positioning in Both Flying-Height and Off-Track Directions

Yu, Shengkai; Liu, B.; Hua, Wei; Zhou, Weidong

doi:10.1109/tmag.2007.903096

Cited by 9 publications

(6 citation statements)

References 8 publications

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“…It is an interesting research topic [4][5][6][7][8] for head-disk interface design of magnetic hard disk drives as such a scheme can minimize the mechanical mean-plane spacing between the head slider and the disk media. The major concerns of such a scheme include the contact-induced wear, slider's vibrations in FH and off-track directions [8,9]. Up to now, no industry acceptable total solution has been developed yet for the application of the contactrecording technology in magnetic hard disk drives.…”

Section: Introductionmentioning

confidence: 99%

Towards fly- and lubricant-contact recording

Liu¹,

Zhang²,

Yu³

et al. 2008

Journal of Magnetism and Magnetic Materials

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Section: Introductionmentioning

confidence: 99%

Towards fly- and lubricant-contact recording

Liu¹,

Zhang²,

Yu³

et al. 2008

Journal of Magnetism and Magnetic Materials

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“…To correlate the numerical simulations and experimental measurements, conventionally, a variety of linear models have been used to approximate system for parameter identification, which includes the conventional three-degree-of-freedom (3-DOF) model characterizing vertical translation, pitch, and roll angular motions of slider, 5-DOF, 6-DOF, and multiple-DOF models [7,11,[21][22][23][24][25][26][27][28]. On the other hand, there are many nonlinear models developed to characterize a variety of the nonlinear dynamic properties of interface together with 1-DOF, 2-DOF, 3-DOF, and 6-DOF [1][2][3][4][5][25][26][27][28].…”

Section: Resultsmentioning

confidence: 99%

Identification of the Spectrum Signature of Air-Bearing Slider Dynamics

Sheng

Duan

2010

Tribol Lett

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Characterization of the motion of air-bearing slider with sub-10-nm clearance is becoming a critical aspect of developing advanced head-disk interfaces (HDI) in hard disk drives to achieve higher areal data densities. In this article, the response of sub-10-nm clearance air-bearing slider induced by a bump contact is recorded using laser Doppler vibrometer (LDV). To identify system dynamics in terms of spectral decomposition, the slider response is studied using FFT, power spectrum density, spectrogram, and Hilbert instantaneous spectrum analysis. The results demonstrate that the response of air-bearing slider in instantaneous contact exhibits nonstationary and nonlinear properties which can be accurately identified using Hilbert instantaneous spectrum. The interpretation and spectrum identification based on Fourier analysis and its extension in time-frequency domain could lead to inaccurate results due to their limitation in resolution and linearity assumption.

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“…The contact-induced nonlinearities of air-bearing slider have also been characterized [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32]. The latest research includes two-to three-dimensional motion of sliders contacting media, the bouncing vibrations of partial contact air-bearing sliders, using the generalized Reynolds equation modified with the Fukui-Kaneko slip correction, and a slip correction for the contact situation.…”

Section: Nonlinear Dynamics Of Slider In Sub-10 Nm Clearance Regimementioning

confidence: 99%

“…The latest research includes two-to three-dimensional motion of sliders contacting media, the bouncing vibrations of partial contact air-bearing sliders, using the generalized Reynolds equation modified with the Fukui-Kaneko slip correction, and a slip correction for the contact situation. The adhesion, contact, and friction are also comprehensively considered [27][28][29][30][31][32].…”

Section: Nonlinear Dynamics Of Slider In Sub-10 Nm Clearance Regimementioning

confidence: 99%

Sensing and Identification of Nonlinear Dynamics of Slider with Clearance in Sub-5 Nanometer Regime

Sheng

2011

Advances in Tribology

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This paper provides an overview of the problems pertaining to the sensing and identification of nonlinear dynamics of slider with clearance in sub-5 nanometer regime. This problem is complex in nature because the nonlinear dynamics of slider in sub-5 nanometer clearance regime involves different sources of nonlinear, nonstationary, and uncertainty characteristics. For example, the involved forces such as air-bearing force, intermolecular force, and contact forces are all nonlinear. The complex interface interaction with mobile lubricant makes the slider response be nonstationary. Furthermore, the interfacial parameters are available only by assumptions in the sense of statistics. Most of the reported studies either focused on physics-based simulations by using assumed interfacial parameters or focused on experimental characterization. The issues of the sensing and identification of the nonlinear dynamic properties of slider in nanometer clearance regime will be discussed with an aim at illustrating the promising approaches for improving the correlation between test data and physics-based simulations.

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Dynamics of Read/Write Head Positioning in Both Flying-Height and Off-Track Directions

Cited by 9 publications

References 8 publications

Towards fly- and lubricant-contact recording

Towards fly- and lubricant-contact recording

Identification of the Spectrum Signature of Air-Bearing Slider Dynamics

Sensing and Identification of Nonlinear Dynamics of Slider with Clearance in Sub-5 Nanometer Regime

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