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Featured researches published by Masahide Yatsu.


IEEE Transactions on Magnetics | 1999

Time optimal track-to-track seek control by model following deadbeat control

Masahmi Iwashiro; Masahide Yatsu; Hiroshi Suzuki

This paper proposes a time optimal control method for track-to-track seek. Deadbeat control is applied to model following seek control, in which a single control architecture covers seeking and tracking control. Time delay between head position detection and VCM input was compensated. Experimenting with this control method upon a 2.5 inch HDD, we confirmed that it showed the good performance and control robustness.


Archive | 1997

Head positioning control system for use in a disk drive using different target velocity data for read and write seeks

Masahide Yatsu


Archive | 2002

Magnetic disk drive apparatus having a self-servo writing system and method for writing servo pattern therein

Masahide Yatsu


Archive | 2003

Method and apparatus for servo writing in a disk drive

Masahide Yatsu


Archive | 2004

Method and apparatus for servo writing using incorporated servo writer in a disk drive

Masahide Yatsu


Archive | 1998

Head positioning control system for use in a disk storage drive

Hidetoshi Kawachi; Masahide Yatsu; Tatsuharu Kusumoto


Archive | 2007

Method and apparatus for writing servo pattern using spiral pattern in disk drive

Seiji Mizukoshi; Masahide Yatsu; Hideo Sado; Katsuki Ueda; Toshitaka Matsunaga; Shinichirou Kouhara; Shouji Nakajima


Archive | 1998

Head positioning system and method for use in disk recording/reproducing apparatus

Masahide Yatsu


Archive | 2006

Method and apparatus for writing servo information

Hideo Sado; Masahide Yatsu; Masafumi Iwashiro; Shouji Nakajima; Seiji Mizukoshi; Shinichirou Kouhara


Archive | 2007

Method and apparatus for writing a spiral servo pattern on a disk in a disk drive

Shinichirou Kouhara; Masahide Yatsu; Masafumi Iwashiro; Hideo Sado; Katsuki Ueda; Seiji Mizukoshi; Shouji Nakajima

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