CA934852A - Velocity servo system - Google Patents

Velocity servo system

Info

Publication number
CA934852A
CA934852A CA085016A CA85016A CA934852A CA 934852 A CA934852 A CA 934852A CA 085016 A CA085016 A CA 085016A CA 85016 A CA85016 A CA 85016A CA 934852 A CA934852 A CA 934852A
Authority
CA
Canada
Prior art keywords
servo system
velocity servo
velocity
servo
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
CA085016A
Other languages
English (en)
Other versions
CA85016S (en
Inventor
O. Halfhill Martin
J. Sordello Frank
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Information Storage Systems Inc
Original Assignee
Information Storage Systems Inc
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
Application filed by Information Storage Systems Inc filed Critical Information Storage Systems Inc
Application granted granted Critical
Publication of CA934852A publication Critical patent/CA934852A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G11B21/12—Raising and lowering; Back-spacing or forward-spacing along track; Returning to starting position otherwise than during transducing operation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/46—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring amplitude of generated current or voltage
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D3/00—Control of position or direction
    • G05D3/12—Control of position or direction using feedback
    • G05D3/14—Control of position or direction using feedback using an analogue comparing device
    • G05D3/1409—Control of position or direction using feedback using an analogue comparing device with dc amplifier chain
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D3/00—Control of position or direction
    • G05D3/12—Control of position or direction using feedback
    • G05D3/14—Control of position or direction using feedback using an analogue comparing device
    • G05D3/1445—Control of position or direction using feedback using an analogue comparing device with a plurality of loops
    • G05D3/1463—Control of position or direction using feedback using an analogue comparing device with a plurality of loops using PID devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
    • H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
    • H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
    • H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
    • H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
    • H02P7/2855—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
    • H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
    • H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
    • H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
    • H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
    • H02P7/288—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using variable impedance
    • H02P7/2885—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using variable impedance whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S388/00—Electricity: motor control systems
    • Y10S388/907—Specific control circuit element or device
    • Y10S388/91—Operational/differential amplifier

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Linear Motors (AREA)
  • Moving Of Head For Track Selection And Changing (AREA)
  • Control Of Direct Current Motors (AREA)
  • Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
CA085016A 1969-08-20 1970-06-09 Velocity servo system Expired CA934852A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US85169569A 1969-08-20 1969-08-20

Publications (1)

Publication Number Publication Date
CA934852A true CA934852A (en) 1973-10-02

Family

ID=25311419

Family Applications (1)

Application Number Title Priority Date Filing Date
CA085016A Expired CA934852A (en) 1969-08-20 1970-06-09 Velocity servo system

Country Status (6)

Country Link
US (1) US3626264A (xx)
JP (1) JPS5119125B1 (xx)
CA (1) CA934852A (xx)
FR (1) FR2056578A5 (xx)
GB (1) GB1329991A (xx)
NL (1) NL167535C (xx)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4371903A (en) * 1981-09-28 1983-02-01 Dma Systems Corporation Emergency head retract system for magnetic disc drives
US4658308A (en) * 1986-03-05 1987-04-14 Miniscribe Corporation Method and apparatus for retracting head and braking motor of a disc drive device
EP0332058A1 (de) * 1988-03-07 1989-09-13 Siemens Aktiengesellschaft Schaltungsanordnung zum automatischen Rückführen einer Positioniereinrichtung eines Datenspeichers in eine Ruhestellung
SG47005A1 (en) * 1990-06-28 1998-03-20 Mitsubishi Electric Corp Movable head position controlling device for magnetic recording and reproducing apparatuses
US5491394A (en) * 1993-08-20 1996-02-13 Maxtor Corporation Acceleration sensing write disable system utilizing actuator arm coil
US5714862A (en) * 1996-05-02 1998-02-03 The United States Of America As Represented By The Department Of Energy Method and apparatus for monitoring the rotating frequency of de-energized induction motors
US6373650B1 (en) * 1998-08-20 2002-04-16 Stmicroelectronics, Inc. Voice coil motor control circuit having alternative modes of operation and method of operation thereof
US6639749B1 (en) 1999-01-21 2003-10-28 Seagate Technology Llc Supplying power from a spindle motor in a disc drive system
US6859340B2 (en) 2001-03-09 2005-02-22 Seagate Technology Llc Method and device for retracting an actuator
US7145742B2 (en) * 2004-09-30 2006-12-05 Agere Systems, Inc. Velocity controlled disk drive head retraction after power loss

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2905876A (en) * 1957-04-08 1959-09-22 Hycon Mfg Company On-and-off velocity servosystem
US3027505A (en) * 1959-07-27 1962-03-27 Lear Inc Motor control having rate feedback
DE1223032B (de) * 1961-10-25 1966-08-18 Telefunken Patent Anordnung zur Steuerung der Ankerspannung eines Gleichstrom-Nebenschlussmotors
US3260912A (en) * 1963-06-19 1966-07-12 Gen Motors Corp Power amplifier employing pulse duration modulation
US3450973A (en) * 1963-09-06 1969-06-17 Ampex Tape transport system including deadband amplifier means
GB1054730A (xx) * 1964-10-26
US3350616A (en) * 1964-12-22 1967-10-31 Cutler Hammer Inc Tachometer failure protection circuit for electric motor
US3436635A (en) * 1965-09-02 1969-04-01 Bendix Corp Pulse width modulated servo drive control system
US3465227A (en) * 1966-05-10 1969-09-02 Charles V Ivie Control system for a d.c. load having an analog input

Also Published As

Publication number Publication date
US3626264A (en) 1971-12-07
NL7011999A (xx) 1971-02-23
DE2039283B2 (de) 1976-02-19
JPS5119125B1 (xx) 1976-06-15
GB1329991A (en) 1973-09-12
FR2056578A5 (xx) 1971-05-14
NL167535C (nl) 1981-12-16
NL167535B (nl) 1981-07-16
DE2039283A1 (de) 1971-03-04

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