Title :
TrueTrack/sup TM/ servo technology for high track density storage
Author :
Sri-Jayantha, S.M. ; Hien Dang ; Sharma, A. ; Yoneda, I. ; Kitazaki, N. ; Yamamoto, S.
Author_Institution :
IBM Res., Yorktown Heights, NY, USA
Abstract :
The performance of a high track density disk drive is critically limited by positioning errors induced by disk shift, spindle vibration and disk warp-based servomechanics. The spectrally rich error components are compensated for by high-gain digital filters. The filters augment the basic function of a conventional controller. Using a novel method for initializing filters, precision tracking is achieved without compromising the settle out performance of a disk drive. A silicon servo chip has been designed to incorporate the key functions of the algorithm.
Keywords :
digital filters; disc drives; servomechanisms; TrueTrack servo technology; algorithm; controller; digital filter; disk drive; disk shift; disk warp; magnetic recording; position error signal; silicon chip; spindle vibration; track density; Attenuation; Bandwidth; Digital filters; Feeds; Frequency; Mechanical variables measurement; Open loop systems; Servomechanisms; State feedback; Steady-state;
Conference_Titel :
Asia-Pacific Magnetic Recording Conference, 2000. APMRC 2000
Conference_Location :
Tokyo, Japan
Print_ISBN :
0-7803-6254-3
DOI :
10.1109/APMRC.2000.898919
