Nonlinear dynamic effects at the head disk interface

被引：23

作者：

Knigge, B ^{[1
]}

Talke, FE ^{[1
]}

机构：

[1] Univ Calif San Diego, CMRR, La Jolla, CA 92093 USA

来源：

IEEE TRANSACTIONS ON MAGNETICS | 2001年 / 37卷 / 02期

关键词：

lubricant; nonlinear effects; slider dynamics;

D O I：

10.1109/20.917639

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The contact dynamics of pico sliders is investigated using a high bandwidth laser Doppler vibrometer (LDV) and a high bandwidth acoustic emission (AE) sensor. Sliding contact of the slider near the glide avalanche point as analyzed for a lubricant thickness of 1.5 nm, 2.5 nm, and 3.5 nm, respectively, Slider airbearing modes as well as torsional and bending mode vibrations are investigated as a function of disk velocity and lubricant thickness, Damping of the airbearing pitch and roll frequency is found to increase with increased lubricant thickness. Nonlinear slider/lubricant interactions are observed leading to additional peaks in the LDV spectrum near the bending mode frequency. Nonlinear effects due to slider/lubricant interactions are modeled using a nonlinear stiffness term in the equation of motion. The numerical and experimental results are found to be in good agreement.

引用

页码：900 / 905

页数：6

共 10 条

[1] Lubricant thickness effect on tribological performance of ZDOL lubricated disks with hydrogenated overcoats [J].