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TECHNICAL PAPERS

Optimal Design of HDD Air-Lubricated Slider Bearings for Improving Dynamic Characteristics and Operating Performance

[+] Author and Article Information
Tae-Sik Kang

Samsung Advanced Institute of Technology, P.O. Box 111, Suwon, Korea 440-600

Dong-Hoon Choi

Center of Innovative Design Optimization Technology, Hanyang University, Seoul, Korea 133-791 e-mail: dhchoi@email. hanyang.ac.kr

Tae-Gun Jeong

School of Mechanical Engineering, Konkuk University, Seoul, Korea 143-701

J. Tribol 123(3), 541-547 (Jul 06, 2000) (7 pages) doi:10.1115/1.1308031 History: Received February 04, 2000; Revised July 06, 2000
Copyright © 2001 by ASME
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References

White,  J. W., 1997, “Flying Characteristics of the Transverse and Negative Pressure Contour (“TNP”) Slider Air Bearing,” ASME J. Tribol., 119, pp. 241–249.
Yoon,  S.-J., and Choi,  D.-H., 1995, “Design Optimization of the Taper-Flat Slider Positioned by a Rotary Actuator,” ASME J. Tribol., 117, pp. 588–593.
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.
O’Hara,  M. A., and Bogy,  D. B., 1995, “Robust Design Optimization Techniques for Ultra-Low Flying Sliders,” IEEE Trans. Magn., 31, pp. 2955–2957.
Lu,  S., Hu,  Y., O’Hara,  M., Bogy,  D. B., Bhatia,  C. S., and Hsia,  Y.-T., 1996, “Air Bearing Design, Optimization, Stability Analysis and Verification for Sub-25 nm Flying,” IEEE Trans. Magn., 32, pp. 103–109.
O’Hara,  M. A., Hu,  Y., and Bogy,  D. B., 1996, “Effects of Slider Sensitivity Optimization,” IEEE Trans. Magn., 32, pp. 3744–3746.
Choi,  D.-H., and Yoon,  S.-J., 1994, “Static Analysis of Flying Characteristics of the Head Slider by Using an Optimization Technique,” ASME J. Tribol., 116, pp. 90–94.
Fukui,  S., and Kaneko,  R., 1988, “Analysis of Ultra-Thin Gas Film Lubrication Based on Linearized Boltzmann Equation: First Report-Derivation of a Generalized Lubrication Equation Including Thermal Creep Flow,” ASME J. Tribol., 110, pp. 253–262.
Cha,  E., and Bogy,  D. B., 1995, “A Numerical Scheme for Static and Dynamic Simulation of Subambient Pressure Shaped Rail Sliders,” ASME J. Tribol., 117, pp. 36–46.
Ono,  K., 1975, “Dynamic Characteristics of Air-Lubricated Slider Bearing for Noncontact Magnetic Recording,” ASME J. Lubr. Technol., 97, pp. 250–260.
Deng, Z., Mitsuya, Y., and Ohka, M., 1997, “Flying Characteristics of Head Sliders When Travelling over Magnetic Disk Surfaces,” Proceedings of the International Conference on Micromechatronics for Information and Precision Equipment, Tokyo, July, 20–23, pp. 90–95.
Cha,  E., Chiang,  C., and Lee,  J. J. K., 1995, “Flying Height Change During Seek Operation for TPC Sliders,” IEEE Trans. Magn., 31, pp. 2967–2969.
Liu,  B., and Soh,  S. H., 1996, “Effects of Seeking Velocity on Air Bearing Skew Angle, Air Flow Speed and Flying Performance of Sliders with Different ABS Designs,” IEEE Trans. Magn., 32, pp. 3693–3695.
Vanderplaats, G. N., 1984, Numerical Optimization Techniques for Engineering Design, McGraw-Hill, New York.
Vanderplaats, G. N., 1985, “ADS-A Fortran Program for Automated Design Synthesis Version 1.10,” Engineering Design Optimization, Inc.
Zoutendijk, G., 1960, Methods of Feasible Directions, Elsevier, Amsterdam.

Figures

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New air-bearing designs
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Flowchart for the optimum design of the slider
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Gain/loss of air-bearing skew angle and air-flow velocity during track seek
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Design variables and side constraints
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Optimized configurations (solid) and original configurations (dashed) including pressure distributions
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Convergence history of the cost values for the three sliders
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Flying height variations of the optimum design (solid) and the original design (dashed) for the three sliders
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Pitch angle variations of the optimum design (solid) and the original design (dashed) for the three sliders
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Roll angle variations of the optimum design (solid) and the original design (dashed) for the three sliders

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