KSME International Journal

, Volume 16, Issue 8, pp 1102–1108 | Cite as

Topological design sensitivity on the air bearing surface of head slider

Article

Abstract

In this study, a topological design sensitivity of the air bearing surface (ABS) is suggested by using an adjoint variable method. The discrete form of the generalized lubrication equation based on a control volume formulation is used as a compatible condition. A residual function of the slider is considered as an equality constraint function, which represents the slider in equilibrium. The slider thickness parameters at all grid cells are chosen as design variables since they are the topological parameters determining the ABS shape. Then, a complicated adjoint variable equation is formulated to directly handle the highly nonlinear and asymmetric coefficient matrix and vector in the discrete system equation of air-lubricated slider bearings. An alternating direction implicit (ADI) scheme is utilized for the numerical calculation. This is an efficient iterative solver to solve large-scale problem in special band storage. Then, a computer program is developed and applied to a slider model of a sophisticated shape. The simulation results of design sensitivity analysis (DSA) are directly compared with those of FDM at the randomly selected grid cells to show the effectiveness of the proposed approach. The overall distribution of DSA results are reported, clearly showing the region on the ABS where special attention should be given during the manufacturing process.

Key Words

Design Sensitivity Analysis(DSA) Air Bearing Surface(ABS) 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Choi, D.-H. and Kang, T. -S., 1999. “An Optimization Method for Design of the Subambient Pressure Shaped Rail Sliders,”ASME Journal of Tribology, Vol. 121, pp. 575–580.CrossRefGoogle Scholar
  2. Choi, D.-H. and Yoon, S.-J.. 1994, “Static Analysis of Flying Characteristics of the Head Slider by Using an Optimization Technique.”ASME Journal of Tribology, Vol. 116, pp. 90–94.CrossRefGoogle Scholar
  3. 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 Journal of Tribology, Vol. 110, pp. 253–262.CrossRefGoogle Scholar
  4. Fukui, S. and Kaneko, R., 1990, “A Database for Interpolation of Poiseuille Flow Rates for High Knudsen Number Lubrication Problems,”ASME Journal of Tribology, Vol. 112, pp. 78–83.CrossRefGoogle Scholar
  5. Haftka, R. T. and Gurdal, Z., 1992,Elements of Structural Optimization, 3rd Revised and Expanded Edition. Kluwer Academic Publishers.Google Scholar
  6. Hu, Y. and Bogy, D. B., 1998, “Solution of the Rarefied Gas Lubrication Equation Using an Additive Correction Based Multigrid Control Volume Method,”ASME Journal of Tribology, Vol. 120, pp. 280–288.CrossRefGoogle Scholar
  7. Kang, T. S. and Choi, D.-H., 2001, “Optimal Design of HDD Air-Lubricated Slider Bearings for Improving Dynamic Characteristics and Operating Performance,”ASME Journal of Tribology, Vol. 123, pp. 541–547.CrossRefGoogle Scholar
  8. Lu, S., Hu. Y., O’Hara, M. A., Bogy. D. B., Bhatia, C. S. and Hsia, Y.-T., 1996, “Air Bearing Design, Optimization, Stability Analysis and Verification for Sub-25nm Flying,”IEEE Transactions on Magnetics, Vol. 32, No. 1, pp. 103–109.CrossRefGoogle Scholar
  9. O’Hara, M. A. and Bogy, D. B., 1995. “Robust Design Optimization Techniques for Ultra-Low Flying Sliders,”IEEE Transactions on Magnetics, Vol. 31, pp. 2955–2957.CrossRefGoogle Scholar
  10. O’Hara, M. A., Hu, Y. and Bogy, D. B., 1996, “Effects of Slider Sensitivity Optimization,”IEEE Transactions on Magnetics, Vol. 32, No. 5, pp. 3744–3746.CrossRefGoogle Scholar
  11. Patankar, S. V., 1980, Numerical Heat Transfer and Fluid Flow, McGraw-Hill, New York.MATHGoogle Scholar
  12. Yoon, S.-J. and Choi, D.-H., 1995, “Design Optimization of the Taper-Flat Slider Positioned by a Rotary Actuator,”ASME Journal of Tribology, Vol. 117, No. 4, pp. 588–593.CrossRefGoogle Scholar
  13. Yoon, S.-J. and Choi, D.-H., 1997, “An Optimum Design of the Transverse Pressure Contour Slider for Enhanced Flywheel Characteristics,”ASME Journal of Tribology, Vol. 119, No. 3, pp. 520–524.CrossRefGoogle Scholar

Copyright information

© The Korean Society of Mechanical Engineers (KSME) 2002

Authors and Affiliations

  1. 1.Center of Innovative Design Optimization TechnologyHanyang UniversitySeoulKorea

Personalised recommendations