JPS58127203A - Control system - Google Patents

Control system

Info

Publication number
JPS58127203A
JPS58127203A JP1029882A JP1029882A JPS58127203A JP S58127203 A JPS58127203 A JP S58127203A JP 1029882 A JP1029882 A JP 1029882A JP 1029882 A JP1029882 A JP 1029882A JP S58127203 A JPS58127203 A JP S58127203A
Authority
JP
Japan
Prior art keywords
control
control loop
loop
dead band
controller
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.)
Pending
Application number
JP1029882A
Other languages
Japanese (ja)
Inventor
Kiyoshi Matsunaga
清 松永
Nobuo Akamatsu
赤松　信夫
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.)
Yokogawa Electric Corp
Original Assignee
Yokogawa Electric Corp
Yokogawa Hokushin Electric Corp
Yokogawa Electric Works Ltd
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 Yokogawa Electric Corp, Yokogawa Hokushin Electric Corp, Yokogawa Electric Works Ltd filed Critical Yokogawa Electric Corp
Priority to JP1029882A priority Critical patent/JPS58127203A/en
Publication of JPS58127203A publication Critical patent/JPS58127203A/en
Pending 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
    • G05B11/00—Automatic controllers
    • G05B11/01—Automatic controllers electric
    • G05B11/32—Automatic controllers electric with inputs from more than one sensing element; with outputs to more than one correcting element

Landscapes

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

Abstract

PURPOSE:To realize a control system comprising plural prallel connected feedback control loops without mutual interference, by providing a dead band for an indicating controller forming the control loop being in danger of mutual interference. CONSTITUTION:The indicating controller 2 transmits a control signal to a control valve 3 to zero the deviation between a measuring value from a flowmeter 1 and a set value. Thus, the control valve 3 is controlled by switching so that the measuring value from the flowmeter 1 and the set value are made to coincide. If mutual interference due to other control loops takes place in a control loop L1, as the indicating controller 2 having the control loop L1, the controller having a dead band is used. The width of the dead band is set to an arbitrary value within about + or -5% of the full span. Thus, even if an external disturbance to the loop L1 is caused from the result of control of a control loop L2, when the deviation due to the external disturbance is within the dead band of the controller 2 forming the control loop L1, the control loop L1 forms a stable state.

Description

【発明の詳細な説明】 本発明は、制御システムに関するものであって、評しく
電よ、共通の制御系統に、設定値と一定値との偏差を零
にするための制御信号を送出する調節計で形成された複
数０７４−ドパツタ制御ループが並列接続された制御シ
ステムにおいて、あるフィードバック制御ループの制御
結果により偽のフィードバック制御ループの制御動作が
干渉されないようにしたものである◎ １１！Ｉｗは、本発明に係る制御システム〇−例を示す
構成説明図であって、共通の制御系統に１複歇の７（−
ドパツク制御ループＬ１〜Ｌｍが並列に接続された例を
示していゐ。図面ＫｓＰいて、１は流量針、２は調節針
、５は制御弁である。ＩＩＩＩｌｌｔ２は、流量針１か
らの一定値と設定値との偏差を零にする丸めの制御信号
を制御弁ｉ６ｃ送出する・これにより、制御弁５は、流
量針１かｂｏｗｓ定値と設定値とが一致するように開閉
制御されゐことＫなあ・ところで、このように共通の制
御系統に複数の制御ループを並列接続した場合、オープ
ンループでは各ループの測定値が安定していても、図の
ように）（−ドパツク制御ループにすると、ある制御ル
ープ０ＩＩＩ制御動作によ〕、他の制御ループに干渉を
生じて一定値か不安定になりてし會うことがあゐ・ζＯ
ような相互干−が発生すゐと、制御系統全体の制御動作
が安定化すゐ壜でに相ａｍ＊時間を要する仁とｋな〕、
好ｔＬ（’ない〇本発ｌ１ＩＩＩ′ｉ、このような欠点
を郷決するために、少なくとも相互干渉を受けるおそれ
がフイードパツク制御ループを形成する調節針として不
感帯を有するものを用いるようｋしたものである◎すな
わち、図面において、制御ループＬ１のみに他の制御ル
ープによる相互干渉が発生するものとすると、制御ルー
１Ｌ１を形成すゐ調節計２として不感帯を有するものを
用いるよう圧する・不感帯の幅は、フルスパンの±５チ
程度内の任意Ｏ値に設定できるものであればよい。これ
により、たとえば制御ループＬ２の制御結果によ〕制御
ループＬＩＫ対する外乱が生じても、その外ＵＫよる偏
差の大壷さが制御ループＬ１を形成すゐ調節針２の不感
帯内であれば制御ループＬ１は安定状態を保つととくな
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control system, and particularly relates to an adjustment system for sending a control signal to a common control system to zero the deviation between a set value and a constant value. In a control system in which a plurality of 074-doppatsuta control loops formed by a total of 074 controllers are connected in parallel, the control result of a certain feedback control loop is prevented from interfering with the control operation of a false feedback control loop.◎ 11! Iw is a configuration explanatory diagram showing an example of a control system according to the present invention, in which a common control system has one multiple cycle 7(-
An example is shown in which the dopak control loops L1 to Lm are connected in parallel. In the drawing KsP, 1 is a flow rate needle, 2 is an adjustment needle, and 5 is a control valve. IIIllt2 sends a rounded control signal to the control valve i6c that makes the deviation between the constant value from the flow rate needle 1 and the set value zero.Thus, the control valve 5 causes the flow rate needle 1 to change between the constant value and the set value. By the way, when multiple control loops are connected in parallel to a common control system like this, even if the measured value of each loop is stable in the open loop, the open/close control is controlled to match. ) (-When using a double control loop, the control operation of one control loop 0III) may interfere with other control loops, resulting in a constant value or instability.・ζO
If such mutual drying occurs, it will take a considerable amount of time to stabilize the control operation of the entire control system.
In order to eliminate such drawbacks, it is recommended to use a needle with a dead zone as the adjustment needle forming the feed pack control loop, which is at least susceptible to mutual interference. ◎In other words, in the drawing, if it is assumed that mutual interference occurs only in the control loop L1 by other control loops, it is necessary to use a controller 2 that has a dead zone to form the control loop L1.The width of the dead zone is: Any O value that can be set to an arbitrary O value within about ±5 inches of the full span is sufficient.Thus, even if a disturbance occurs to the control loop LIK (for example, due to the control result of the control loop L2), the large deviation due to UK can be avoided. If the pot forms the control loop L1 and is within the dead zone of the adjusting needle 2, the control loop L1 maintains a stable state.

なお、上記実施例では、相互干渉を受けるおそれのある
制御ループを形成する調節針のみに不感帯を設ける例に
／）いて説明したが、全制御ループを不感帯が調整可能
な調節針を用いて形成１、相互干渉の大きさに応じてそ
れぞれ不感帯を調整するよう圧してもよい＠ また、干渉を互いに打ち消すように１形演算をIn the above embodiment, a dead zone is provided only for the adjustment needles forming a control loop that may be subject to mutual interference.However, it is also possible to form all control loops using adjustment needles with adjustable dead zones. 1. You may be forced to adjust each dead zone according to the magnitude of mutual interference.

【図面の簡単な説明】[Brief explanation of the drawing]

一負丹 ＋ ＋ □−−−臼 １二 り し Ichigotan + + □－－－mortar 12 the law of nature death

Claims (1)

【特許請求の範囲】[Claims] 共通の制御系統に、設定値と測定値との偏差を零にする
ための制御信号を送出する調節針で形成された複数０フ
イードバツク制御ループが並列接を形成ｒる調節針とし
て不感帯を有するものを用いることを特徴とする制御シ
ステム・A common control system has a dead zone as an adjustment needle in which multiple 0 feedback control loops formed by adjustment needles that send out control signals to make the deviation between the set value and the measured value zero are connected in parallel. A control system characterized by using
JP1029882A 1982-01-26 1982-01-26 Control system Pending JPS58127203A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1029882A JPS58127203A (en) 1982-01-26 1982-01-26 Control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1029882A JPS58127203A (en) 1982-01-26 1982-01-26 Control system

Publications (1)

Publication Number Publication Date
JPS58127203A true JPS58127203A (en) 1983-07-29

Family

ID=11746357

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1029882A Pending JPS58127203A (en) 1982-01-26 1982-01-26 Control system

Country Status (1)

Country Link
JP (1) JPS58127203A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002050377A (en) * 2000-08-01 2002-02-15 Matsushita Electric Ind Co Ltd Fuel cell system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS543595B2 (en) * 1973-03-20 1979-02-24
JPS5667403A (en) * 1979-10-19 1981-06-06 Ihc Holland Nv Control system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS543595B2 (en) * 1973-03-20 1979-02-24
JPS5667403A (en) * 1979-10-19 1981-06-06 Ihc Holland Nv Control system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002050377A (en) * 2000-08-01 2002-02-15 Matsushita Electric Ind Co Ltd Fuel cell system

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