WO2004063828A3 - Digital actuator control and method - Google Patents

Digital actuator control and method Download PDF

Info

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
Application number
PCT/US2004/000173
Other languages
French (fr)
Other versions
WO2004063828A2 (en
Inventor
John K Rote
Liyong Chen
Original Assignee
Texas Instruments Inc
John K Rote
Liyong Chen
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US10/663,266 external-priority patent/US7167334B2/en
Application filed by Texas Instruments Inc, John K Rote, Liyong Chen filed Critical Texas Instruments Inc
Publication of WO2004063828A2 publication Critical patent/WO2004063828A2/en
Publication of WO2004063828A3 publication Critical patent/WO2004063828A3/en

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition 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
    • G11B5/54Disposition 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
    • G11B5/55Track change, selection or acquisition by displacement of the head
    • G11B5/5521Track change, selection or acquisition by displacement of the head across disk tracks
    • G11B5/5526Control therefor; circuits, track configurations or relative disposition of servo-information transducers and servo-information tracks for control thereof
    • G11B5/553Details
    • G11B5/5547"Seek" control and circuits therefor
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition 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
    • G11B5/58Disposition 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
    • G11B5/596Disposition 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.
PCT/US2004/000173 2003-01-06 2004-01-06 Digital actuator control and method WO2004063828A2 (en)

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)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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

Similar Documents

Publication Publication Date Title
EP1434045A3 (en) Hardness testing apparatus
WO2005101998A3 (en) Content sampling and identification
WO2003069304A3 (en) Method and apparatus for assay of electrochemical properties
AU2003235628A1 (en) Arrangement and method for the analysis of body fluids
WO2007070814A3 (en) Method and apparatus for sensorless position control of a permanent magnet synchronous motor (pmsm) drive system
Prufer et al. Identification of robot dynamics with differential and integral models: a comparison
WO2006069023A3 (en) Assay method and apparatus with reduced sample matrix effects
WO2008013578A3 (en) High speed motor control
EP1772824A3 (en) Method of processing an ultrasound image
EP1416476A3 (en) Head positioning method, and disk apparatus using the same
WO2006047662A3 (en) Method and apparatus for sediment characterization
WO2004083811A3 (en) Method and apparatus for controlling position of a laser of a maldi mass spectrometer
WO2000066994A3 (en) Processing technology for lcm samples
WO2004077043A3 (en) Robotic friendly external loading system for electrophoresis instrument and method
EP1482503A3 (en) Disk apparatus and head positioning method
WO2005060338A3 (en) Method, device and system for programming a robot
EP1130580A3 (en) Optical disk device
WO2004063828A3 (en) Digital actuator control and method
EP1306658A3 (en) Method for preparing corneocyte specimens and staining corneocytes, and skin analysis system
KR100487042B1 (en) Positioning control apparatus
US6184645B1 (en) Voltage mode drive for control circuit for an actuator using sampled back EMF control
AU2002349499A1 (en) Apparatus and method for measuring reaction result of samples on biosensor
JPH09146645A (en) Digital servo device using look-ahead learning
KR100406453B1 (en) Disk storage device and method of deciding the position of the head
WO2006009963A3 (en) Method and apparatus for determining system integrity for an oilfield machine

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): BW GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase