GB1334531A - Automatic control systems which employ redundancy - Google Patents
Automatic control systems which employ redundancyInfo
- 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
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.
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)
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 |
-
1971
- 1971-04-19 GB GB1334531D patent/GB1334531A/en not_active Expired
Cited By (4)
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 |