Design of damped air bearings at head disk interface

Jianhua Li; Junguo Xu; Yuki Shimizu; Masayuki Honchi; Kyosuke Ono

doi:10.1115/IJTC2009-15079

Design of damped air bearings at head disk interface

Jianhua Li, Junguo Xu, Yuki Shimizu, Masayuki Honchi, Kyosuke Ono

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Small perturbation and modal-analysis methods were employed to systematically study a damped slider's dynamic characteristics. We found that a design with grooves distributed on a trailing pad effectively improved the slider's damping at higher frequencies, and the damping ratio was dependent on the number of grooves, their depth, location, width, length, distribution, orientation, and types. A higher damping ratio could be obtained by optimizing these parameters. The femto slider with distributed damping grooves on a trailing pad had a higher damping ratio in the third mode, and hence, its responses to disk parallel and wavy motion were greatly reduced. This new design for the damped slider was an effective solution reducing the slider's modulation.

Original language	English
Title of host publication	Proceedings of the ASME/STLE International Joint Tribology Conference 2009, IJTC2009
Pages	399-402
Number of pages	4
DOIs	https://doi.org/10.1115/IJTC2009-15079
Publication status	Published - 2010 Jun 24
Externally published	Yes
Event	2009 ASME/STLE International Joint Tribology Conference, IJTC2009 - Memphis, TN, United States Duration: 2009 Oct 19 → 2009 Oct 21

Publication series

Name	Proceedings of the ASME/STLE International Joint Tribology Conference 2009, IJTC2009

Other

Other	2009 ASME/STLE International Joint Tribology Conference, IJTC2009
Country	United States
City	Memphis, TN
Period	09/10/19 → 09/10/21

ASJC Scopus subject areas

Colloid and Surface Chemistry
Fluid Flow and Transfer Processes
Surfaces and Interfaces

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10.1115/IJTC2009-15079

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Design of damped air bearings at head disk interface. / Li, Jianhua; Xu, Junguo; Shimizu, Yuki; Honchi, Masayuki; Ono, Kyosuke.

Proceedings of the ASME/STLE International Joint Tribology Conference 2009, IJTC2009. 2010. p. 399-402 (Proceedings of the ASME/STLE International Joint Tribology Conference 2009, IJTC2009).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Li, J, Xu, J, Shimizu, Y, Honchi, M & Ono, K 2010, Design of damped air bearings at head disk interface. in Proceedings of the ASME/STLE International Joint Tribology Conference 2009, IJTC2009. Proceedings of the ASME/STLE International Joint Tribology Conference 2009, IJTC2009, pp. 399-402, 2009 ASME/STLE International Joint Tribology Conference, IJTC2009, Memphis, TN, United States, 09/10/19. https://doi.org/10.1115/IJTC2009-15079

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abstract = "Small perturbation and modal-analysis methods were employed to systematically study a damped slider's dynamic characteristics. We found that a design with grooves distributed on a trailing pad effectively improved the slider's damping at higher frequencies, and the damping ratio was dependent on the number of grooves, their depth, location, width, length, distribution, orientation, and types. A higher damping ratio could be obtained by optimizing these parameters. The femto slider with distributed damping grooves on a trailing pad had a higher damping ratio in the third mode, and hence, its responses to disk parallel and wavy motion were greatly reduced. This new design for the damped slider was an effective solution reducing the slider's modulation.",

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AB - Small perturbation and modal-analysis methods were employed to systematically study a damped slider's dynamic characteristics. We found that a design with grooves distributed on a trailing pad effectively improved the slider's damping at higher frequencies, and the damping ratio was dependent on the number of grooves, their depth, location, width, length, distribution, orientation, and types. A higher damping ratio could be obtained by optimizing these parameters. The femto slider with distributed damping grooves on a trailing pad had a higher damping ratio in the third mode, and hence, its responses to disk parallel and wavy motion were greatly reduced. This new design for the damped slider was an effective solution reducing the slider's modulation.

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