Air bearing slider dynamic performance during the ramp loading and unloading processes was investigated theoretically in this paper. The air bearing was modeled by the modifiedcompressible Reynolds equation, and it was solved by the finite volume method. Slider dynamic equations were derived in this paper to include the ramp loading/unloading mechanism. These two sets of coupled equations were solved iteratively. Both Tripad and negative pressure air bearing (NPAB) were included in the analysis. Effects of loading/unloading velocity, disk rotational speed, as well as suspension flexure stiffness, were investigated. Slider-disk impact will occur during the Tripad loading process, especially at high loading velocity. On the other hand, this impact can be avoided for an NPAB at loading velocity up to 200 mm/s. However, an NPAB requires a longer unloading time due to its suction force. This unloading process is further delayed if a soft flexure is combined with an NPAB.

1.
Benson, R. C., Chiang, C., and Talke, F. E., 1989, “The Dynamics of Slider Bearings During Contacts Between Slider and Disk,” IBM Journal of Research and Development, Vol. 33, No. 1.
2.
Bolasna, S. A., and Chhabra, D. S., 1995, Roll Insensitive Air Bearing Slider, US Patent No. 5,396,386.
3.
Fu
T.-C.
, and
Bogy
D. B.
,
1994
, “
Slider Vibrations Induced by Ramp-Suspension Interaction During the Ramp Loading Process
,”
IEEE Transactions on Magnetics
, Vol.
30
, pp.
4170
4172
.
4.
Fu
T.-C.
, and
Bogy
D. B.
,
1995
, “
Drive Level Slider-Suspension Vibration Analysis and Its Application to a Ramp-Load Magnetic Disk Drive
,”
IEEE Transactions on Magnetics
, Vol.
31
, pp.
3003
3005
.
5.
Fu
T.-C.
, and
Bogy
D. B.
,
1996
, “
Dynamic Load Head-Disk Interface Durability of 50 Percent Sliders and Polished Disks
,”
IEEE Transactions on Magnetics
, Vol.
32
, pp.
3747
3749
.
6.
Fukui
S.
, and
Kaneko
R.
,
1988
, “
Analysis of Ultra-thin Gas Film Lubrication Based on Linearized Boltzmann Equation, First Report—Derivation of Generalized Lubrication Equation Including Thermal Creep Flow
,”
ASME JOURNAL OF TRIBOLOGY
, Vol.
110
, pp.
335
341
.
7.
Greenwood, J. A., and Williamson, J. B. P., 1966, “Contact of Nominally Flat Surfaces,” Proceedings Royal Society (London), Series A295, pp. 300–319.
8.
Gross, W. A., 1980, Fluid Film Lubrication, Wiley, New York.
9.
Hu, Y., and Bogy, D. B., 1997, “Effects of Laser Texture Disk Surfaces on a Slider’s Flying Characteristics,” presented at the 1997 ASME/STLE/IMechE World Tribology Conference, London, England, paper no. 97-Trib-18.
10.
Hu
Y.
,
Jones
P. M.
,
Chang
P. T.
, and
Bogy
D. B.
,
1998
, “
Partial Contact Air Bearing Characteristics of Tripad Sliders for Proximity Recording
,”
ASME JOURNAL OF TRIBOLOGY
, Vol.
120
, Ap., p.
272
272
.
11.
Jeong
T. G.
, and
Bogy
D. B.
,
1992
, “
An Experimental Study of the Parameters That Determine Slider-Disk Contacts During Dynamic Load-Unload
,”
ASME JOURNAL OF TRIBOLOGY
, Vol.
114
, pp.
507
514
.
12.
Jeong, T. G., and Bogy, D. B., 1993, “Numerical Simulation of Dynamic Loading in Hard Disk Drives,” ASME JOURNAL OF TRIBOLOGY, Vol. 115.
13.
Jeong
T. G.
, and
Bogy
D. B.
,
1995
, “
Demagnetization Due to Inverse Magnetostriction Effects in Longitudinal Thin Film Media
,”
IEEE Transactions on Magnetics
, Vol.
31
, pp.
1007
1012
.
14.
Levi
P. G.
, and
Talke
F. E.
,
1992
, “
Load/Unload Investigations on a Rotatory Actuator Disk Drive
,”
IEEE Transactions on Magnetics
, Vol.
28
, pp.
2877
2879
.
15.
Levi
P. G.
, and
Talke
F. E.
,
1993
, “
Effect of Ramp Profile and Spindle Speed on Head-Disk Contact During Rotary Load/Unload
,”
IEEE Transactions on Magnetics
, Vol.
29
, pp.
3918
3920
.
16.
Newmark, N. M., 1959, “A Method for Computation of Structural Dynamics,” Proceedings American Society of Civil Engineers, EM3, pp. 67–94.
17.
Patankar, S. V., 1980, Numerical Heat Transfer and Fluid Flow, McGraw-Hill, New York.
18.
Peng
J. P.
, and
Hardie
C. E.
,
1995
, “
A Finite Element Scheme for Determining the Shaped Rail Slider Flying Characteristics With Experimental Confirmation
,”
ASME JOURNAL OF TRIBOLOGY
, Vol.
117
, pp.
358
364
.
19.
Peng
J. P.
, and
Hardie
C. E.
,
1996
, “
Characteristics of Air Bearing Suction Force in Magnetic Recording Disks
,”
ASME JOURNAL OF TRIBOLOGY
, Vol.
118
, pp.
554
549
.
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