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TECHNICAL PAPERS

Analysis of Tracking Characteristics and Optimum Design of Tri-Pad Slider to Micro-Waviness

[+] Author and Article Information
Masami Yamane, Kyosuke Ono

Department of Mechanical and Control Engineering, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8552, Japan

Kohei Iida

Graduate School of Mechanical Engineering, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8552, Japan

J. Tribol 125(1), 152-161 (Dec 31, 2002) (10 pages) doi:10.1115/1.1510882 History: Received March 05, 2002; Revised June 28, 2002; Online December 31, 2002
Copyright © 2003 by ASME
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References

Menon, A. K., 1999, “Critical Requirements For 100Gb/in2 Head/Media Interface,” ASME Proc. of the Sympo. on Interface Technology Towards 100 Gbit/in2 , ASME, New York, pp. 1–9.
Yao, W., Kuo, D., and Gui, J., 1999, “Effects of Disc Micro-Waviness in An Ultra-High Density Magnetic Recording System,” ASME Proc. of the Sympo. on Interface Technology Towards 100 Gbit/in2 , ASME, New York, pp. 31–37.
Fukui, S., Kogure, K., and Mistuya, Y., 1985, “Dynamic Characteristics of Flying-Head Slider on Running Wavy Disk,” Tribology and Mechanics of Storage Systems, II, ASLE SP-19, pp. 52–58.
Zhu, L.-Y., and Bogy, D. B., 1989, “Head-Disk Spacing Fluctuation Due to Disk Topography in Magnetic Recording Hard Disk Files,” Tribology and Mechanics of Magnetic Storage Systems, STLE Special Publication SP-26, pp. 160–167.
Zeng,  Q. H., and Bogy,  D. B., 2000, “A Simplified 4-DOF Suspension Model for Dynamic Load/Unload Simulation and Lti Application,” ASME J. Tribol., 122, pp. 274–279.
Chapin,  M., and Bogy,  D. B., 2000, “Air Bearing Force Measurement of Pico Negative Pressure Slider During Dynamic Unload,” ASME J. Tribol., 122, pp. 771–775.
Iida,  K., and Ono,  K., 2001, “Analysis of Bouncing Vibrations of a 2-DOF Model of Tripad Contact Slider Over a Random Wavy Disk Surface,” ASME J. Tribol., 123, pp. 159–167.
Iida,  K., Ono,  K., and Yamane,  M., 2002, “Dynamic Characteristics and Design Consideration of a Tripad Slider in The Near-Contact Regime,” ASME J. Tribol., 124, pp. 600–606.
Bogy,  D. B., Zeng,  Q. H., and Chen,  L. S., 1998, “Air-Bearing Designs for Stable Performance in Proximity Magnetic Recording,” Adv. Inf. Storage Syst., 9, pp. 121–132.
Yoon,  S. J., and Choi,  D. H., 1997, “An Optimum Design of the Transverse Pressure Contour Slider for Enhanced Flying Characteristics,” ASME J. Tribol., 119, pp. 520–524.
Choi,  D. H., and Kang,  T. S., 1999, “An Optimization Method for Design of Subambient Pressure Shaped Rail Slider,” ASME J. Tribol., 121, pp. 575–580.
Hashimoto,  H., and Hattori,  Y., 2000, “Improvement of the Static and Dynamic Characteristics of Magnetic Head Sliders by Optimum Design,” ASME J. Tribol., 122, pp. 280–287.
Ono,  K., Takahashi,  K., and Iida,  K., 1999, “Computer Analysis of Bouncing Vibration and Tracking Characteristics of a Point Contact Slider Model Over Random Disk Surfaces,” ASME J. Tribol., 121, pp. 587–595.

Figures

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Geometry of a typical tri-pad slider
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Concentrated air-bearing model
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Distributed air-bearing model
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Effect of the head-gap position on FRF of spacing variation
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Image of the slider vibration
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Effect of the front air-bearing position on FRF of spacing variation
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Effect of the head-gap position on FRF of spacing variation.
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rms value of spacing variation versus dh/a for three cases (a) rail slider (lf=0.8a,df=0.1a) and (b) pad slider (lf=0.2a,df=0.4a).
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Effect of rear air-bearing length in FRF of spacing variation for two
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Effect of the position of front air-bearing center on FRF
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1-DOF analytical model of slider with distributed air-bearing stiffness
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Influence functions of front and rear air-bearing length: (a) function Yf(Xf) of front air-bearing; and (b) function Yr(Xr) of rear air-bearing (αr=0.15)
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Effect of rear and front air-bearing lengths on FRFs of spacing variation: (a) effect of lrn on |Zh/Zd| at lf=0; and (b) effect of lf on |Zh/Zd| at lrn
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Effects of lrn,kr0, and lf on rms value of spacing variation: (a) effect of lrn on σH at lf=0 for three cases of rear air-bearing stiffness; and (b) effect of lf on σH when kf0=1.0×105 N/m and kr0=2.0×105 N/m

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