Title :
Simultaneous detection method of position and velocity for hard-disk drive servo system
Author_Institution :
Fuji Electr. Corporate Res. & Dev. Ltd., Nagano, Japan
Abstract :
We propose a method for simultaneously detecting the position and velocity of a magnetic head relative to the target track in a hard-disk drive (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.
Keywords :
disc drives; hard discs; position measurement; velocity measurement; HDD; burst signal phase shift; hard-disk drive servo system; magnetic head; position detection; servo system sampling rate; target track; velocity detection; Circuit stability; Control systems; Damping; Feedback; Frequency; Hard disks; Magnetic heads; Servomechanisms; Servomotors; Target tracking;
Conference_Titel :
SICE 2002. Proceedings of the 41st SICE Annual Conference
Print_ISBN :
0-7803-7631-5
DOI :
10.1109/SICE.2002.1195184
