GB1334531A - Automatic control systems which employ redundancy - Google Patents

Automatic control systems which employ redundancy

Info

Publication number
GB1334531A
GB1334531A GB1334531DA GB1334531A GB 1334531 A GB1334531 A GB 1334531A GB 1334531D A GB1334531D A GB 1334531DA GB 1334531 A GB1334531 A GB 1334531A
Authority
GB
United Kingdom
Prior art keywords
signals
redundancy
automatic control
integrators
channels
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
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.)
UK Atomic Energy Authority
Original Assignee
UK Atomic Energy Authority
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 UK Atomic Energy Authority filed Critical UK Atomic Energy Authority
Publication of GB1334531A publication Critical patent/GB1334531A/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
    • G05B9/03—Safety arrangements electric with multiple-channel loop, i.e. redundant control systems

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Safety Devices In Control Systems (AREA)
  • Feedback Control In General (AREA)

Abstract

1334531 Automatic control UNITED KINGDOM ATOMIC ENERGY AUTHORITY 19 April 1971 [2 Jan 1970] 264/70 Heading G3R A closed loop plant variable control system includes at least three integrating sub-systems operating in redundant mode. As shown, signals 1' 1 -1' 3 corresponding to a plant variable are fed back for comparison with a desired value 1<SP>2</SP> 1 -1<SP>2</SP> 3 at C 1 -C 3 in three channels I-III which provide for redundancy. The three resulting error signals e<SP>2</SP> 1 -e<SP>2</SP> 3 are separately integrated at Sand all three integrated signals are applied to logic circuits MS1-MS3 which each select the median value for control of the plant through separate actuators (not shown) to provide further redundancy. Differences between the outputs of the integrators are derived by comparators C 7 -C 9 and fed back to the integrators to balance their outputs and reduce the risk of saturation of any channel. Use of larger odd numbers of channels is referred to.
GB1334531D 1971-04-19 1971-04-19 Automatic control systems which employ redundancy Expired GB1334531A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB26471 1971-04-19

Publications (1)

Publication Number Publication Date
GB1334531A true GB1334531A (en) 1973-10-17

Family

ID=9701300

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1334531D Expired GB1334531A (en) 1971-04-19 1971-04-19 Automatic control systems which employ redundancy

Country Status (1)

Country Link
GB (1) GB1334531A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5622102A (en) * 1979-07-31 1981-03-02 Shimadzu Corp Adjusting device
WO1981000774A1 (en) * 1979-09-04 1981-03-19 Boeing Co Signal selection from redundant channels
JPS56155411A (en) * 1980-02-25 1981-12-01 Boeing Co Electronic control device
US4472806A (en) * 1982-05-03 1984-09-18 The Boeing Company Signal selection and fault detection apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5622102A (en) * 1979-07-31 1981-03-02 Shimadzu Corp Adjusting device
WO1981000774A1 (en) * 1979-09-04 1981-03-19 Boeing Co Signal selection from redundant channels
JPS56155411A (en) * 1980-02-25 1981-12-01 Boeing Co Electronic control device
US4472806A (en) * 1982-05-03 1984-09-18 The Boeing Company Signal selection and fault detection apparatus

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee