1. TrueTrack[TM] Servo Technology for High TPI Disk Drives
- Author
-
Sri-Jayantha, Sri M., Dang, Hien, Sharma, Arun, Yoneda, Isao, Kitazaki, Nabuyuki, and Yamamoto, Satoshi
- Subjects
Disk drives -- Design and construction ,Servomechanisms -- Usage ,Vibration -- Analysis ,Business ,Electronics ,Electronics and electrical industries - 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 can be 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. An autonomous filter state propagation method during seek is shown to simplify the implementation process. A silicon servo chip has been designed to incorporate the key functions of the algorithm. Index Terms--Algorithm, digital filter, disk shift, servomechanics, vibration.
- Published
- 2001