Invention Grant
- Patent Title: Quiet high performance seek procedure for disk drives
- Patent Title (中): 安静的磁盘驱动器高性能查找程序
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Application No.: US11715861Application Date: 2007-03-08
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Publication No.: US07660070B2Publication Date: 2010-02-09
- Inventor: Doug Frisby , Jim Hargarten
- Applicant: Doug Frisby , Jim Hargarten
- Applicant Address: VG Tortola
- Assignee: ESGW Holdings Limited
- Current Assignee: ESGW Holdings Limited
- Current Assignee Address: VG Tortola
- Agency: Saile Ackerman LLC
- Agent Stephen B. Ackerman
- Main IPC: G11B5/55
- IPC: G11B5/55

Abstract:
a seek procedure for a hard disk drive which provides a significant reduction in acoustic noise as well as high performance fast seek times is described. The seek procedure lowers the peak acceleration for short seeks and imparts a smooth transition from a sine seek to an exponential arrival at the target track. The seek procedure provides an error free feedforward signal derived from a single sine table. The procedure which contains a time domain sinusoid acceleration feedforward combined with a phase-plane trajectory controlled velocity which, near seek completion. The procedure is constructed so that the acceleration begins at zero and, in the fashion of a sine, increases to a maximum, decreases to a minimum and then increases again until a computed switchpoint is reached. The switchpoint is determined in-situ, to provide a smooth and continuous velocity transition from sinusoid to exponential. The velocity trajectory is computed from a look-up table. The procedure is implemented using conventional seek controller servo components and commercially available operation software.
Public/Granted literature
- US20080218899A1 Quiet high performance seek procedure for disk drives Public/Granted day:2008-09-11
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