The objective of the present work is to present the numerical analysis of the computer hard disk slider. The air film pressure is calculated using the finite element method. The conjugate-gradient method and the perturbation method are employed in the static analysis of the slider. The steady state attitude of the femto slider is studied for various radial positions and skew angles. It is found that the perturbation method is an efficient method for gradient evaluation. Also, it is shown that optimization of the Hessian matrix form accelerates the search process.
1.
White
, J. W.
, 1997
, “Flying Characteristics of the Transverse and Negative Pressure Contour (TNP) Slider Air Bearing
,” ASME J. Tribol.
, 119
, 241
–248
.2.
Mitsuya
, Y.
, and Ota
, H.
, 1991
, “Stiffness and Damping of Compressible Lubrication Films Between Computer Flying Heads and Textures Media: Perturbation Analysis Using Finite Element Method
,” ASME J. Tribol.
, 113
, 819
–827
.3.
Faria
, M. T. C.
, and Andres
, L. S.
, 2000
, “On the Numerical Modeling of High-Speed Hydrodynamic Gas Bearings
,” ASME J. Tribol.
, 122
, 124
–130
.4.
Peng
, J. P.
, and Hardie
, C. E.
, 1996
, “Characteristics of the Air Bearing Suction Force in Magnetic Recording Disks
,” ASME J. Tribol.
, 118
, 549
–553
.5.
Zeng
, Q. H.
, and Bogy
, D. B.
, 1999
, “Stiffness and Damping Evaluation of Air Bearing Slider and New Designs With High Damping
,” ASME J. Tribol.
, 121
, 341
–347
.6.
Kawabata
, N.
, 1991
, “A Useful Numerical Analysis Method for the Dynamic Characteristics of Fluid Film Lubrication (The Case of Incompressible Fluid Lubrication)
,” JSME Int. J.
, 34
(1
), 91
–96
.7.
Wu
, L.
, and Bogy
, D. B.
, 2000
“Unstructured Adaptive Triangular Mesh Generation Techniques and Finite Volume Schemes for the Air Bearing Problem in the Hard Disk
,” ASME J. Tribol.
, 122
, 761
–770
.8.
Fukui
, S.
, and Kaneko
, R.
, 1990
, “A Database for the Interpolation of Poiseuille Flow Rate for the High Knudsen Number Lubrication Problems
,” ASME J. Tribol.
, 112
, 78
–83
.9.
Wu
, L.
, and Bogy
, D. B.
, 2002
, “Effect of the Intermolecular Forces on the Flying Attitude of Sub-5 NM Flying Height Air Bearing Sliders in the Hard Disk Drives
,” ASME J. Tribol.
, 124
, 562
–567
.10.
Hwang
, P.
, Park
, S. S.
, and Kim
, E.
, 2002
, “A Study on Lubricative Characteristics of the Negative Pressure Slider
,” KSTLE Int. J
, 3
(2
), 110
–113
.11.
Choi
, D.-H.
, and Yoo
, S.-J.
, 1994
, “Static Analysis of Flying Characteristics of the Head Slider by Using an Optimization Technique
,” Trans. ASME
, 116
, 90
–94
.12.
Ono
, K.
, 1975
, “Dynamic Characteristics of Air-Lubricated Slider Bearing for Noncontact Magnetic Recording
,” ASME J. Lubr. Technol.
, 97
, 250
–260
.13.
Kang
, T. S.
, Choi
, D. H.
, and Jeong
, T. G.
, 2001
, “Optimal Design of HDD Air-Lubricated Slider Bearings for Improving Dynamic Characteristics and Operating Performance
,” ASME J. Tribol.
, 123
, 541
–547
.14.
Yoo
, S.-J.
, and Choi
, D.-H.
, 2003
, “Adjoint Design Sensitivity Analysis of Molecular Gas Film Lubrication Sliders
,” ASME J. Tribol.
, 125
, 145
–151
.15.
Yoo
, S.-J.
, and Choi
, D.-H.
, 2004
, “Topology Design of Slider Air Bearings
,” Trans. ASME
, 126
, 342
–346
.16.
Huebner, K. H., Thornton, E. A., and Byrom, T. G, 1995, The Finite Element Method for Engineers, Wiley, New York, pp. 137–141.
17.
Cuthill, E., and McKee, J. M., 1969, “Reducing the Bandwidth of Sparse Symmetric Matrices,” Proc. 24th National Conf. Association for Computing Machinery, ACM Publication P69, New York, pp. 157–172.
18.
Bazaraa, M. S., and Shetty, C. M., 1979, Nonlinear Programming, Wiley, New York, pp. 289–316.
19.
Thornton
, B. H.
, Nayak
, A.
, and Bogy
, D. B.
, 2002
, “Flying Height Modulation Due to Disk Waviness of Sub-5 nm Flying Height Air bearing Sliders
,” ASME J. Tribol.
, 124
, 762
–770
.Copyright © 2005
by ASME
You do not currently have access to this content.