Dynamic contact with friction of an ultra-low flying head-disk interface with thermal protrusion

Abstract

Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Abstract-A dynamic two-degree-of-freedom contact with friction model of the head-disk interface (llD1) is presented accounting for slider thermal protrusion and its influence on the IIDI dynamics. Using this model, which includes roughness, the applied power to the thermal protrusion is calculated that leads to minimum flying-height modulations. The model predictions are verified by drive-level experimental results.Index Terms-dynamic model; magnetic storage; head-disk interface; thermal protrusion.

Smoothing Position Error Signal Corrupted by Impulsive Disturbances

“…Obviously, the accuracy of the above identification depends on the proper selection of the lower bound and the upper bound , which can be approximated recursively using the current and all previous values of otherwise (5) otherwise (6) where is used so that is above the normal signal and is below the normal signal, as illustrated in Figs. 4 and 5.…”

“…H ARD DISK DRIVES have various internal vibrations [1], [2] and external vibrations [3] that the servo mechanism needs to deal with in order to achieve the stringent tracking accuracy required by the ever-growing track per inch (TPI) numbers [4], [5]. Future recording systems will have low flying height, higher level of media noise, and thus low signal-to-noise ratio (SNR).…”