Topographic feedforward system

摘要

A control mechanism may control the height and/or position of a read/write head configured to interact with a rotating information storage surface. A computation unit may compute a detected topography from gap measurements using a dynamic filter including a model of read/write head dynamics. A sensor may detect gap measurements of a side read/write track while the read/write head is interacting with a current read/write track. A memory may store the detected topography. The control mechanism may adjust the height of the read/write head based on the detected and/or stored topography. The control mechanism may be a reactionless control mechanism configured to apply a counterforce to offset movements of the read/write head and/or a slider.

主权项

1. A system for measuring surface topography of read/write tracks on a rotating information storage surface, the system comprising:
a topography detection mechanism configured to measure surface height of the read/write tracks on the rotating information storage surface; and a computation unit configured to calculate a functional representation of a topographical profile based on the measured surface height and slope information.