Time-Frequency Analysis of Slider Dynamics and the Effect of Lubricant-Reference-Cited by-同舟云学术

Time-Frequency Analysis of Slider Dynamics and the Effect of Lubricant

Published:2004-06-28 Issue:3 Volume:126 Page:559-564
ISSN:0742-4787
Container-title:Journal of Tribology
language:en
Short-container-title:

Author:

Deoras Saurabh K.¹,Talke Frank E.¹

Affiliation:

1. Center for Magnetic Recording Research, Department of Mechanical and Aerospace Engineering, University of California, San Diego, San Diego, California 92093-0401

Abstract

The dynamics of pico sliders is investigated during scratch impact using laser Doppler vibrometry. Air-bearing frequencies and damping of the pitch-2 frequency are studied as a function of disk velocity for lubricant thickness values of 1.6 nm, 1.0 nm and 2.0 nm. Time-frequency analysis is performed to study the instantaneous air-bearing frequencies. System identification methods are used to model the response of the slider after a scratch impact. The results indicate that the slider dynamics and the damping coefficients are affected by the disk velocity and lubricant thickness and also possibly by disk micro-waviness.

Publisher

ASME International

Subject

Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering,Mechanics of Materials

Link

http://asmedigitalcollection.asme.org/tribology/article-pdf/126/3/559/5753704/559_1.pdf

Reference15 articles.

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2. Menon, A. K., 1999, “Critical Requirements for 100 Gb/in2 Head/Disk Interface,” ASME Proc. Symp. Interface Technology Towards 100 Gb/in2, 9, ASME, New York, pp. 1–9.

3. Knigge, B., and Talke, F., 2001, “Dynamics of Transient Events at the Head/Disk Interface,” Tribol. Int., 34(7), pp. 453–460.

4. Zeng, Q. H., and Bogy, D. B., 1999, “Experimental Evaluation of Stiffness and Damping of Slider Air Bearings in Hard Disk Drives,” ASME J. Tribol., 121, pp. 102–107.

5. Wang, S., Chang, Y. C., and Liu, J. J., 1999, “A Novel Drag Test for Observing Lubricant Redistribution Due to Head-Disk Interactions,” IEEE Trans. Magn., 35(5), pp. 2448–2450.

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