Simultaneous Detection Method of Position and Velocity for Hard-Disk Drive Servo System

Kiminori Sato

doi:10.11499/sicep.2002.0.15.0

SICE Annual Conference 2002

DOI https://doi.org/10.11499/sicep.2002.0.15.0

Conference information

Host: The Society of Instrument and Control Engineers

Co-host: IEEE/Industiral Electronic Society, IEEE/Robotics and Automation Society, IEEE/Control System Society

Simultaneous Detection Method of Position and Velocity for Hard-Disk Drive Servo System

Kiminori Sato

Author information

Keywords: Servo Pattern, HDD, Velocity, Position, Phase, Frequency

CONFERENCE PROCEEDINGS FREE ACCESS

Pages 15

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Abstract

We propose a method for simultaneously detecting the position and velocity of a magnetic head relative to the target track in a HDD by using a new servo pattern. The position is derived from the phase shift of the burst signal from the pattern, and the velocity is derived from the frequency shift thereof. By applying this method, the sampling rate of the servo system can be reduced to less than 1/2.

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