GB1463101A - Closed-loop system control apparatus - Google Patents

Closed-loop system control apparatus

Info

Publication number
GB1463101A
GB1463101A GB2172574A GB2172574A GB1463101A GB 1463101 A GB1463101 A GB 1463101A GB 2172574 A GB2172574 A GB 2172574A GB 2172574 A GB2172574 A GB 2172574A GB 1463101 A GB1463101 A GB 1463101A
Authority
GB
United Kingdom
Prior art keywords
speed
error
parameter
valid
motor
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
GB2172574A
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB1463101A publication Critical patent/GB1463101A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B9/00—Safety arrangements
    • G05B9/02—Safety arrangements electric
    • 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
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/42—Servomotor, servo controller kind till VSS
    • G05B2219/42293—Regenerate faulty feedback by using previous value, substitute

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Electric Motors In General (AREA)
  • Feedback Control In General (AREA)
  • Safety Devices In Control Systems (AREA)
  • Control Of Velocity Or Acceleration (AREA)
  • Testing And Monitoring For Control Systems (AREA)

Abstract

1463101 Automatic control systems INTERNATIONAL BUSINESS MACHINES CORP 16 May 1974 [10 Aug 1973] 21725/74 Heading G3R A system parameter is sampled and if "valid" i.e. within an acceptable range, is stored and used to control the sensed parameter. If however this parameter is "invalid" i.e. not within the acceptable range, due to a fault the sensed parameter is controlled according to the most recent stored, prior "valid" signals. In the embodiment, the parameter e.g. temperature or motor speed is sampled aperiodically and compared with the acceptable range which depends upon the interval between samples and upon a second sensed process parameter. As shown, the speed of D.C. motor 40 driving a magnetic tape capstan is measured by a tachometer 43 whose speed dependent period T between adjacent pulses is compared with a desired value Tr, to form a speed error signal. If this error falls within the acceptable range #Tr i.e. is "valid" the motor speed is controlled using the error. If however the error is "invalid" e.g. due to a temporary failure of the sensor, the motor speed is controlled by the last "valid" error as stored in hold network 55. The speed error is used to modify a speed command signal from network 56, so as to control the acceleration, constant speed or deceleration of the motor.
GB2172574A 1973-08-10 1974-05-16 Closed-loop system control apparatus Expired GB1463101A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00387267A US3845370A (en) 1973-08-10 1973-08-10 Credibility testing in sampled-data systems

Publications (1)

Publication Number Publication Date
GB1463101A true GB1463101A (en) 1977-02-02

Family

ID=23529162

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2172574A Expired GB1463101A (en) 1973-08-10 1974-05-16 Closed-loop system control apparatus

Country Status (7)

Country Link
US (1) US3845370A (en)
JP (1) JPS5527681B2 (en)
CA (1) CA1005859A (en)
DE (1) DE2431974A1 (en)
FR (1) FR2240476B1 (en)
GB (1) GB1463101A (en)
IT (1) IT1012994B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2197908A (en) * 1986-11-19 1988-06-02 Honda Motor Co Ltd Boost pressure control method

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2548717A1 (en) * 1975-10-31 1977-05-05 Hagenuk Neufeldt Kuhnke Gmbh LIMITING DEVICE FOR REGULAR SIZE MEASURING DEVICES
JPS5284152A (en) * 1976-01-07 1977-07-13 Nippon Kokan Kk Method of controlling continuous rolling machine
USRE32102E (en) * 1976-04-19 1986-04-01 Acrison, Inc. Weigh feeding apparatus
NL7711634A (en) * 1977-10-24 1979-04-26 Philips Nv TACHOMETER SYSTEM.
JPS5882316A (en) * 1981-11-10 1983-05-17 Kubota Ltd Automatic controller for reaping height of reaping and harvesting machine
JPS5998217A (en) * 1982-11-26 1984-06-06 Fujikin:Kk Controller for flow rate
DE3437091A1 (en) * 1984-10-10 1986-04-10 Utp Schweissmaterial Gmbh & Co, 7812 Bad Krozingen METHOD FOR CONTROLLING THE SPEED OF DC MOTORS
US4893262A (en) * 1986-06-27 1990-01-09 K-Tron International, Inc. Weigh feeding system with self-tuning stochastic control
US4775949A (en) * 1986-06-27 1988-10-04 K-Tron International, Inc. Weigh feeding system with stochastic control
US4954975A (en) * 1988-08-10 1990-09-04 K-Tron International, Inc. Weigh feeding system with self-tuning stochastic control and weight and actuator measurements
DE4016481A1 (en) * 1990-05-22 1991-11-28 Siemens Ag METHOD FOR OPERATING A POSITION MEASURING SYSTEM
EP0541326A3 (en) * 1991-11-04 1993-06-09 General Electric Company Determination of control system status
DE4302085C1 (en) * 1993-01-21 1994-07-21 Ihde Stefan Method for dosing and mixing multi-component dental fillers and device for carrying out the method
US6236919B1 (en) * 1999-10-12 2001-05-22 Ford Motor Company Method and apparatus providing operation of an integration hub for automotive signals during low voltage conditions
JP4705128B2 (en) * 2008-04-15 2011-06-22 オリンパスメディカルシステムズ株式会社 manipulator

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3356921A (en) * 1964-04-24 1967-12-05 Minnesota Mining & Mfg Motor control circuit with compensation for dropout of control signals
US3790874A (en) * 1972-07-27 1974-02-05 Cleveland Machine Controls Motor drive control system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2197908A (en) * 1986-11-19 1988-06-02 Honda Motor Co Ltd Boost pressure control method
GB2197908B (en) * 1986-11-19 1990-10-31 Honda Motor Co Ltd Boost pressure control method

Also Published As

Publication number Publication date
FR2240476A1 (en) 1975-03-07
JPS5037982A (en) 1975-04-09
CA1005859A (en) 1977-02-22
US3845370A (en) 1974-10-29
FR2240476B1 (en) 1977-06-24
IT1012994B (en) 1977-03-10
DE2431974A1 (en) 1975-02-20
JPS5527681B2 (en) 1980-07-22

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee