Title :
An advanced sector servo using a learning, estimating and over-sampling method for a 3.5" 28 Mbyte FDD
Author :
Matsukawa, S. ; Yoshiura, Takahito ; Wakabayashi, N. ; Tanimura, T.
Author_Institution :
Matsushita Electr. Ind. Co. Ltd., Osaka, Japan
fDate :
11/1/1991 12:00:00 AM
Abstract :
The authors developed an advanced sector servo which was used in a 28-Mbyte flexible magnetic disk drive (FDD). This sector servo uses a learning method which estimates a continuous track position error between servo sectors based on the information from an external position encoder and an over-sampling method which samples position error at a higher sampling rate. As a result, the authors achieved fine-trackability and high vibration-resistance performance without an increase in the number of servo sectors. The head positioning control system using these methods and the control performances are described
Keywords :
floppy discs; learning systems; position control; servomechanisms; 28 Mbyte; 3.5 in; advanced sector servo; continuous track position error; external position encoder; fine-trackability; flexible magnetic disk drive; head positioning control system; learning method; over-sampling method; vibration-resistance performance; Cities and towns; Communication industry; Control systems; Laboratories; Learning systems; Magnetic heads; Magnetic separation; Sampling methods; Servomechanisms; Vibrations;
Journal_Title :
Magnetics, IEEE Transactions on
