Flying attitudes of the slider, which are flying height, pitch, and roll, are affected by air-flow velocity, skew angle, and manufacturing tolerances. In the traditional design process of air-bearing surfaces, we have considered only the steady state flying attitude over the recording band. To reduce the flying height variation during track seek as well as in steady state, we design a new shape for air-bearing surfaces. An optimization technique is used to improve the dynamic characteristics and operating performance of the new air-bearing surface shapes. The quasistatic approach is used in the numerical simulation of the track seek operation because the skew angle effect dominates the inertial effect even at high seek velocities. The perturbation method is applied to the lubrication equation to obtain the air-bearing stiffness. We employ the method of modified feasible directions and use the weighting method to solve the multicriteria optimization problem. The optimally designed sliders show enhanced flying and dynamic characteristics. The steady state flying heights are closer to the target values and the flying height variations during track seek operation are smaller than those for the original ones. The pitch and roll angles are kept within suitable ranges over the recording band during track seek operation as well as in steady state. The air-bearing stiffnesses of the optimally designed sliders are larger than those of the original ones.
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July 2001
Technical Papers
Optimal Design of HDD Air-Lubricated Slider Bearings for Improving Dynamic Characteristics and Operating Performance
Tae-Sik Kang, Researcher,,
Tae-Sik Kang, Researcher,
Samsung Advanced Institute of Technology, P.O. Box 111, Suwon, Korea 440-600
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Dong-Hoon Choi, Director,,
Dong-Hoon Choi, Director,
Center of Innovative Design Optimization Technology, Hanyang University, Seoul, Korea 133-791
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Tae-Gun Jeong, Professor,
Tae-Gun Jeong, Professor,
School of Mechanical Engineering, Konkuk University, Seoul, Korea 143-701
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Tae-Sik Kang, Researcher,
Samsung Advanced Institute of Technology, P.O. Box 111, Suwon, Korea 440-600
Dong-Hoon Choi, Director,
Center of Innovative Design Optimization Technology, Hanyang University, Seoul, Korea 133-791
Tae-Gun Jeong, Professor,
School of Mechanical Engineering, Konkuk University, Seoul, Korea 143-701
Contributed by the Tribology Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for presentation at the STLE/ASME Tribology Conference, Seattle, WA, October 1–4. Manuscript received by the Tribology Division February 4, 2000; revised manuscript received July 6, 2000. Paper No. 2000-TR1B-32. Associate Editor: C. P. R. Ku.
J. Tribol. Jul 2001, 123(3): 541-547 (7 pages)
Published Online: July 6, 2000
Article history
Received:
February 4, 2000
Revised:
July 6, 2000
Citation
Kang, T., Choi, D., and Jeong, T. (July 6, 2000). "Optimal Design of HDD Air-Lubricated Slider Bearings for Improving Dynamic Characteristics and Operating Performance ." ASME. J. Tribol. July 2001; 123(3): 541–547. https://doi.org/10.1115/1.1308031
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