This paper describes an improved analytical study of the bouncing vibration of a flying head slider in the near-contact region and gives quantitative designs guideline for realizing a stable flying head slider, based on the results of a parametric study. First, we numerically calculated the general characteristics of the contact and adhesion forces between a smooth contact pad and disk surface by considering asperity contact, the lubricant meniscus, and elastic bulk deformation. As a result, it was shown that the contact characteristics can be represented by a simple model with five independent parameters when the asperity density is large and the asperity height is small as in cases of current slider and disk surfaces. Then, we numerically computed the slider dynamics in a two degree of freedom slider model with nonlinear air-bearing springs by using the simplified contact characteristic model. As a result, we have obtained a self-excited bouncing vibration whose frequency, amplitude and touchdown/takeoff hysteresis characteristics agree much better with the experimental results compared with our previous analysis. From a parametric study for takeoff height, we could obtain design guidelines for realizing a stable head slider in a low flying height of or less.
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e-mail: kyosuke.ono.jk@hitachi.com
e-mail: fwjd8106@mb.infoweb.ne.jp
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January 2007
Technical Papers
Improved Analysis of Unstable Bouncing Vibration and Stabilizing Design of Flying Head Slider in Near-Contact Region
Kyosuke Ono,
Kyosuke Ono
Technical Advisor
Storage Technology Research Center, Central Research Laboratory,
e-mail: kyosuke.ono.jk@hitachi.com
Hitachi Ltd.
, 2880 Kozu, Odawara-shi, Kanagawa-ken 256-8510, Japan
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Masami Yamane
Masami Yamane
Ph.D. Student
Department of Mechanical and Control Engineering,
e-mail: fwjd8106@mb.infoweb.ne.jp
Graduate School of Science and Engineering
, Tokyo Institute of Technology, Tokyo 152-8550, Japan
Search for other works by this author on:
Kyosuke Ono
Technical Advisor
Storage Technology Research Center, Central Research Laboratory,
Hitachi Ltd.
, 2880 Kozu, Odawara-shi, Kanagawa-ken 256-8510, Japane-mail: kyosuke.ono.jk@hitachi.com
Masami Yamane
Ph.D. Student
Department of Mechanical and Control Engineering,
Graduate School of Science and Engineering
, Tokyo Institute of Technology, Tokyo 152-8550, Japane-mail: fwjd8106@mb.infoweb.ne.jp
J. Tribol. Jan 2007, 129(1): 65-74 (10 pages)
Published Online: August 20, 2006
Article history
Received:
May 19, 2006
Revised:
August 20, 2006
Citation
Ono, K., and Yamane, M. (August 20, 2006). "Improved Analysis of Unstable Bouncing Vibration and Stabilizing Design of Flying Head Slider in Near-Contact Region." ASME. J. Tribol. January 2007; 129(1): 65–74. https://doi.org/10.1115/1.2401214
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