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Article

Experimental and Analytical Study of Bouncing Vibrations of a Flying Head Slider in a Near-Contact Regime

[+] Author and Article Information
Kyosuke Ono, Hiroshi Yamaura

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

Masami Yamane

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

J. Tribol 127(2), 376-386 (Apr 07, 2005) (11 pages) doi:10.1115/1.1843165 History: Received January 22, 2004; Revised October 22, 2004; Online April 07, 2005
Copyright © 2005 by ASME
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References

Figures

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Hysteresis characteristics of bouncing vibration (N=5.0,μ=3.0,kf0=5.0×105 N/m,kr0=3.0×105 N/m)
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Calculated results of displacement time history and velocity frequency spectrum at the head gap position of a slider (N=5.0,μ=3.0,kf0=5.0×105 N/m,kr0=3.0×105 N/m): (a) nominal flying height=5.8 nm and (b) nominal flying height=9.5 nm
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The maximum zp values of slider vs nominal flying height after imposing disturbances for various values of front and rear air-bearing stiffness (N=5.0,μ=3.0)
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Calculated time history of displacement and frequency spectrum of velocity at head gap position (N=5.0,μ=3.0,kf0=1.0×105 N/m,kr0=6.0×105 N/m,FH=4.5 nm): (a) time history of trailing edge motion and (b) frequency spectrum of trailing edge velocity
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Calculated time history of displacement and frequency spectrum of velocity at head gap position. (N=5.0,μ=3.0,kf0=5.0×105 N/m,FH=7.8 nm)
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Calculated time history of displacement and frequency spectrum of velocity at head gap position (N=5.0,μ=3.0,kf0=5.0×105 N/m,FH=6.0 nm)
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Stick figures of bouncing vibration, natural frequencies, and nodal points of a flying slider for various values of air-bearing stiffness
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The maximum zp values of slider vs nominal flying height after imposing disturbances for various values of the magnification number and frictional coefficient (kf0=5.0×105 N/m,kr0=6.0×105 N/m)
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Collision motion of glass slider on Al disks at various lubricant thicknesses: (a) zero lubricant thickness, (b) 1 nm lubricant thickness, (c) 2 nm lubricant thickness, and (d) 3 nm lubricant thickness
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Outline of experimental setup
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Experimental results of bouncing vibrations of a slider when the flying height is decreased and increased by changing ambient pressure: (a) in touch-down point (0.4 atm), (b) during touch-down and take-off point (0.5 atm), and (c) take-off point (0.56 atm)
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2-DOF slider model for analysis
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Calculated adhesion force of lubricant, real contact force and total contact force (see Ref. 16)
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Air-bearing surface of slider used for the experiment

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