WO2004063828A3 - Digital actuator control and method - Google Patents
Digital actuator control and method Download PDFInfo
- Publication number
- WO2004063828A3 WO2004063828A3 PCT/US2004/000173 US2004000173W WO2004063828A3 WO 2004063828 A3 WO2004063828 A3 WO 2004063828A3 US 2004000173 W US2004000173 W US 2004000173W WO 2004063828 A3 WO2004063828 A3 WO 2004063828A3
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- voltage
- actuator
- digital
- actuator motor
- motor
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
- G11B5/55—Track change, selection or acquisition by displacement of the head
- G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
- G11B5/5526—Control therefor; circuits, track configurations or relative disposition of servo-information transducers and servo-information tracks for control thereof
- G11B5/553—Details
- G11B5/5547—"Seek" control and circuits therefor
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
Abstract
Methods and apparatus for digital control of a head-disk assembly (HDA) actuator with dynamic velocity compensation. The actuator voltage in an HDA is sampled and a velocity error (36, 56) is determined. The voltage applied to the actuator is compensated for the velocity error. This includes by measuring the actual voltage at the actuator motor (12), and alternatively, by calculating the actuator motor voltage using digital processing techniques. A digital voltage command is then provided for applying compensated voltage (40, 60) to the actuator motor. Implementing the invention methods includes using a sampler (18) for sampling an actuator motor voltage, a timer (22), and a digital processing engine (14) for receiving a target actuator voltage command (16) and the digital actuator motor voltage sample and for outputting a digital voltage command for controlling the actuator motor.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US43822503P | 2003-01-06 | 2003-01-06 | |
US60/438,225 | 2003-01-06 | ||
US10/663,266 US7167334B2 (en) | 2003-09-16 | 2003-09-16 | Digital actuator control and method |
US10/663,266 | 2003-09-16 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2004063828A2 WO2004063828A2 (en) | 2004-07-29 |
WO2004063828A3 true WO2004063828A3 (en) | 2005-06-30 |
Family
ID=32717956
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2004/000173 WO2004063828A2 (en) | 2003-01-06 | 2004-01-06 | Digital actuator control and method |
Country Status (1)
Country | Link |
---|---|
WO (1) | WO2004063828A2 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6184645B1 (en) * | 1999-09-02 | 2001-02-06 | Texas Instruments Incorporated | Voltage mode drive for control circuit for an actuator using sampled back EMF control |
US20020033687A1 (en) * | 2000-09-18 | 2002-03-21 | Jiro Abe | Magnetic disk drive and voice coil motor drive circuit |
US20020180392A1 (en) * | 2001-06-01 | 2002-12-05 | Hill John P. | Electrical time constant compensation method for switched, voltage-mode driver circuit |
-
2004
- 2004-01-06 WO PCT/US2004/000173 patent/WO2004063828A2/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6184645B1 (en) * | 1999-09-02 | 2001-02-06 | Texas Instruments Incorporated | Voltage mode drive for control circuit for an actuator using sampled back EMF control |
US20020033687A1 (en) * | 2000-09-18 | 2002-03-21 | Jiro Abe | Magnetic disk drive and voice coil motor drive circuit |
US20020180392A1 (en) * | 2001-06-01 | 2002-12-05 | Hill John P. | Electrical time constant compensation method for switched, voltage-mode driver circuit |
Also Published As
Publication number | Publication date |
---|---|
WO2004063828A2 (en) | 2004-07-29 |
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