| Document
Code: PH A |
| [21] Application Number: | 1-2005-000143 |
| [54] Title: | METHOD AND APPARATUS FOR HEAD POSITIONING CONTROL WITH DISTURBANCE COMPENSATION IN A DISK DRIVE |
| [72] Inventor(s): |
MASAFUMI IWASHIRO, OF SHIMMACHI 9-CHOME, OME-SHI, TOKYO, JAPAN |
| [73] Assignee(s): |
KABUSHIKI KAISHA TOSHIBA , OF 72 Horikawa-cho, Saiwai-ku, , Kawasaki-shi, JAPAN , JAPAN |
| [74] Attorney/Agent: | SAPALO & VELEZ LAW OFFICES |
| [22] Date Filed: | 3/18/2005 |
| [30] | Priority Data: | ||||||||
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| [51] International Class7: | G11B 5/596; G11B 21/10 |
| [57] Abstract: |
| A head positioning control system which is applied to a disk drive is disclosed. The system includes a feedback control system which performs head positioning control of a head and a feedforward control system. The feedforward control system detects the amplitude and phase of a disturbance based on the position error between the position of the head and a target position. The feedforward control system computes a disturbance compensation value for eliminating the disturbance to output the disturbance compensation value to the feedback control system based on each detection result of the amplitude and the phase. |
Representative Drawing(s):
| Search Report |
| [58] Field of Search: | G11B 5/596; G11B 21/10 |
| [56] Documents Considered to be Relevant |
| Category | Citation of Document |
| A | US PAT. NO. 6,711,598 B1 (PARE JR, ET. AL.) 23 MARCH 2004 "THE WHOLE DOCUMENT" |
| A | US PAT. NO. 6,614,615 B1 (JU, ET. AL.) 02 SEPTEMBER 2003 "THE WHOLE DOCUMENT" |
| A | US PAT. NO. 6,417,983 B1 (YATSU) 09 JULY 2002 "THE WHOLE DOCUMENT" |
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