JPS6214201A - Flow rate control device - Google Patents
Flow rate control deviceInfo
- Publication number
- JPS6214201A JPS6214201A JP15276385A JP15276385A JPS6214201A JP S6214201 A JPS6214201 A JP S6214201A JP 15276385 A JP15276385 A JP 15276385A JP 15276385 A JP15276385 A JP 15276385A JP S6214201 A JPS6214201 A JP S6214201A
- Authority
- JP
- Japan
- Prior art keywords
- control
- flow rate
- signal
- time
- set value
- 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
Links
- 239000008400 supply water Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
Landscapes
- Feedback Control In General (AREA)
- Flow Control (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は，軽水冷却型原子炉の一次系補給水系等に適用
される流量制御装置の改良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a flow rate control device applied to a primary make-up water system of a light water-cooled nuclear reactor.
軽水冷却型原子炉の一次系補給水系等では。 In the primary make-up water system of light water-cooled nuclear reactors.
例えば供給水の流量制御が行われており，この流量制御
は，所定期間毎に断続して行なわわ。For example, the flow rate of supplied water is controlled, and this flow rate control is performed intermittently at predetermined intervals.
あるいは所定状態になったときにのみ実行されるいわゆ
るバッチ制御で行われている。第６図を参照して説明す
ると，所定期間毎の制御実行時になると，供給水の流量
が検出され，この流量信号ａと設定１ｉ１ ｂとの偏差
が零となるような制御信号Ｃが作成される。そして、こ
の制御信号Ｃは，流量制御弁に送出されて弁の開度が調
節される。ここで、制御信号Ｃは，制御開始時に「０１
％すなわち制御弁が閉状態を示すものとであり，これか
ら弁開度が調節されて最終的に「０」％に至るものとな
っている。Alternatively, so-called batch control is performed, which is executed only when a predetermined state is reached. To explain with reference to FIG. 6, when control is executed at a predetermined period, the flow rate of the supplied water is detected, and a control signal C is created such that the deviation between this flow rate signal a and the setting 1i1b is zero. Ru. This control signal C is then sent to the flow rate control valve to adjust the opening degree of the valve. Here, the control signal C is “01” at the start of the control.
%, which indicates that the control valve is in a closed state, and the valve opening is adjusted from this point until it finally reaches "0"%.
しかしながら，従来の制御方式では次のような問題点が
ある。すなわち、従来は第に図に示すように如何なる流
量設定値；）に対しても同一のパッチ量ｄを与え，しか
もパンチ開始と同時にフィードバック制御が開始される
（時刻１１）。However, conventional control methods have the following problems. That is, conventionally, as shown in the figure, the same patch amount d is given for any flow rate set value; and feedback control is started at the same time as punching starts (time 11).
このため、パッチ量ｄと目標値（設定流量に見今−）た
制御部＋ｊ（−）との差異が大きい場合、流量制御は振
動的な収束性の長いものとなってし１う。そこで、フィ
ードバックゲインを低下させて振動を取り除こうとする
と、逆に流量がなかなか設定値ｌ）に到達せずに極めて
応答性の曹い制御となってし１う。Therefore, if the difference between the patch amount d and the target value (currently -) of the control unit +j (-) is large, the flow rate control will have a long oscillatory convergence. Therefore, if an attempt is made to remove the vibration by reducing the feedback gain, the flow rate will take a long time to reach the set value l), resulting in extremely responsive control.
そこで本発明は、バッチ開始時に振動が発生せずにしか
も制御部りが速やかに設定値に制御できる流量制御装置
を提供することを目的とする。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a flow rate control device that does not generate vibrations at the start of a batch and can quickly control a control unit to a set value.
１問題点を解決するだめの手段〕
本発明は、１−１記問題点を解決し目的を達成するため
に次のような手段を講じたことを特徴としている。すな
わち、所定期間毎に流量信号を受けて設定信号との偏差
を零とするような制御信号を作成して流量の制御を行う
制御装置において、制御開始時から所定時間経過後まで
は。Means for Solving Problem 1] The present invention is characterized by taking the following means in order to solve problem 1-1 and achieve the object. That is, in a control device that receives a flow rate signal every predetermined period and controls the flow rate by creating a control signal that makes the deviation from the set signal zero, the control device receives a flow rate signal at predetermined intervals and controls the flow rate until after a predetermined period of time has elapsed from the start of control.
フィードバック信号を与えずに固定目標値で制御を行な
い、実流欧と設電流量の偏差が小さくなってからフィー
ドバック制御が開始さｉすることを特徴としている。It is characterized in that control is performed using a fixed target value without giving a feedback signal, and feedback control is started after the deviation between the actual flow rate and the set current amount becomes small.
１作用）
このような手段を講じたことに【す、流ｌｉ！：ｆｉｉ
号が設定値近傍に達してからフィードバック制御が実行
されるものとなる。1 effect) I am surprised that such measures were taken. :fii
Feedback control is executed after the signal reaches near the set value.
〔実施例）
以下１本発明の第１の実施例について図面を参照して説
明する。第１図は流量制御装置の構成図である。同図に
おいて符ジノ１は、供給水が流通する配管であり、この
配管１にはポンプ２が設けられている。符号３は、流Ｍ
検出器であって、この検出器３から出力される流ｈ１信
号ＦＳは、制御部４に送られるようになっている。[Embodiment] A first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of a flow rate control device. In the same figure, reference numeral 1 is a pipe through which supply water flows, and this pipe 1 is provided with a pump 2. Code 3 is flow M
The flow h1 signal FS output from the detector 3 is sent to the control section 4.
壕だ、符号５は、流量制御弁である。この制御部４は、
ハツチ開始信号Ｓ Ｓ （５ｔａｒｔ Ｓｉｇｎａｌ
）が入力された時点から流Ｍ［の制御を開始し、パン
チ終了信号Ｅ Ｓ （Ｆ：ｎｔｌ Ｓｉｇｔ＋ａｌ ）
が人力する１でその流量制御を実行するものとなってい
る。The numeral 5 is the flow control valve. This control section 4 is
Hatch start signal S S (5tart Signal
) is input, the control of the flow M[ is started, and the punch end signal E S (F:ntl Sigt+al) is inputted.
The flow rate control is performed manually by one person.
ここで、この制御部４には特に次のような機能が備えら
れている。すなわち、バッチ開始信号ＳＳが入力した時
点から制御信号目標値Ｒ１と等しい制御信号Ｃ８（Ｃｏ
ｎｔｒｏｌ Ｓｉｇｎａｌ ）を出力し、所定時間’ｒ
’ Ｓ ａつまり制御信号Ｃ８のステップ変動に対して
流量制御弁５が追従して流量信号１ｉ’ Ｓが設定値Ｓ
ｌの近傍に達したことを判断してフィードバック制御を
開始する機能である。Here, this control section 4 is particularly equipped with the following functions. That is, from the time when the batch start signal SS is input, the control signal C8 (Co
ntrol Signal) is output for a predetermined period of time.
'S a, that is, the flow rate control valve 5 follows the step fluctuation of the control signal C8, and the flow rate signal 1i'S becomes the set value S.
This is a function to start feedback control upon determining that the distance has reached the vicinity of l.
ところで、前記制御信号目標値Ｒｌは１次のように求め
られる。すなわち、一般に流量制御弁５を流れる液体の
流量Ｑは。By the way, the control signal target value Rl is obtained in a linear manner. That is, in general, the flow rate Q of the liquid flowing through the flow rate control valve 5 is.
Ｑ ＝ ａ −Ｃｖ （ワワ７− （１）で表わされる
。ここで、△Ｐは、制御弁５の前後の差圧、ｒは流体の
比重、αは比例定数、Ｃｖは制御弁５のＣｖ値である。Q = a - Cv (represented by Wawa 7- (1). Here, △P is the differential pressure before and after the control valve 5, r is the specific gravity of the fluid, α is the proportionality constant, and Cv is the Cv of the control valve 5. It is a value.
なお、 、−１＝記制御弁５は、弁リフトとＣｖ値との
関係は、第２図に示すように１対１つ捷り比例関係にあ
る。In the control valve 5, the relationship between the valve lift and the Cv value is a one-to-one proportional relationship as shown in FIG.
そして、流量Ｑを得るだめのＣｖ値は、第（１）式から
。The Cv value for obtaining the flow rate Q is obtained from equation (1).
ＣＶ＝ （１／α）（ｆｒ）工）Ｑ 、、１２
）と表わされ、この第（２）式から制御、＃Ｐ５の差圧
が判明している場合は流量Ｑに対応するｆｌｙ値が１対
１の関数として求捷る。差圧が判明していない場合でも
２種々の方法で仮宇すればそれに見合うＣｖ値が定まる
。そして、Ｃｖｌｉ’ｔと弁リフトとの関係は１対１で
あるため流ｆｆｌ Ｑと弁リフトとは第３図に示すよう
に１対１の対応関係が成立つことになる。CV = (1/α) (fr) engineering) Q ,, 12
), and from this equation (2), if the differential pressure of control #P5 is known, the fly value corresponding to the flow rate Q is calculated as a one-to-one function. Even if the differential pressure is not known, an appropriate Cv value can be determined by estimating it using two different methods. Since the relationship between Cvli't and the valve lift is one-to-one, the flow fflQ and the valve lift have a one-to-one correspondence as shown in FIG.
整定状態において、弁リフトは制御信号（］Ｓに一致す
るため第３図の関係は流量Ｑと制御信号とについても成
り立つ。したがって、設定値Ｓ１が与えられた場合、整
宇時において設５↑ＩＡＳ１と一致した流量Ｑが得られ
る制御信号Ｃ８が求まりこれを制御信号目標ＭＲ１とし
ている。In the settling state, the valve lift matches the control signal (]S, so the relationship shown in Fig. 3 also holds true for the flow rate Q and the control signal. Therefore, when the set value S1 is given, the set value 5↑ A control signal C8 that provides a flow rate Q that matches IAS1 is determined and is set as the control signal target MR1.
次に上記の如く構成された装置の動作について第４図に
示す制御フローチャートに従って説明する。制御部４は
、バッチ開始信号８ Ｓが入勾さｔまたかを判断し、バ
ッチ制御信号ＳＳが入／Ｊさ７１ていなければ制御信号
ｆｌｓを１０１％のＪ「開度として出力する。したか−
、で、制御１弁５け閉状態となっている。ここで１時刻
１．１にバッチ開始信ｔ、１８Ｓが人力されると、制御
部４はとのバッチ開始時からの経過時間が、設定時間’
ｌ’ Ｓ １よりも長いかを判断してそれが設定時間Ｔ
Ｓ ｌｕ内ならば制御信号ＣＳレベルを制御信号１］
標１ｉＩ″ｆ１（１として制御弁５に送出する。この状
態は１時１１）ビＰを△ｔ、づつカウントして設定時間
１’ Ｓ １が経過するまで継続される。なお、△１゜
は演算周期である。そうして、設定時間Ｔ８１経過した
後、経過時間′Ｖが設定時間ＴＳ２が長いか否かを判断
する。Next, the operation of the apparatus configured as described above will be explained according to the control flowchart shown in FIG. The control unit 4 determines whether the batch start signal 8S is at an inclination angle t or not, and if the batch control signal SS is not at an inclination angle 71, it outputs a control signal fls as an opening degree of 101%. Or?
, five control valves are closed. Here, when the batch start signal t, 18S is input manually at time 1.1, the control unit 4 calculates the elapsed time from the start of the batch to the set time '
Determine whether it is longer than l' S 1 and determine whether it is longer than the set time T.
If it is within S lu, change the control signal CS level to control signal 1]
The mark 1iI''f1 (sent as 1 to the control valve 5. This state is 1:11) BiP is counted by △t and continues until the set time 1'S 1 has elapsed. Note that △1゜is the calculation cycle. After the set time T81 has elapsed, it is determined whether the elapsed time 'V is longer than the set time TS2.
設定時間’ｒ Ｓ ｌ 、 Ｔ Ｓ ２の差は、制御信
号Ｃ８のステップ変動に対し、制御弁５が追従する時間
である、
経過時間１゛が設定時間’ｌ’ Ｓ ２よりも小さいと
き、流量設定値１” Ｓ Ｅ Ｔと流星信号Ｆ８の差△
Ｆと許容値εの大小を比較する。The difference between the set times 'r S l and T S 2 is the time taken by the control valve 5 to follow the step fluctuation of the control signal C8. When the elapsed time 1' is smaller than the set time 'l' S 2, Difference between flow rate setting value 1” S E T and meteor signal F8 △
Compare the magnitude of F and the allowable value ε.
差△Ｆが許容値εより大きいときは、制御信号Ｃ８は、
目標値１（２として制御ｊＦ ５に送出される。When the difference ΔF is larger than the allowable value ε, the control signal C8 is
The setpoint value 1 (2) is sent to the control jF 5.
制御信号目標値１（２は、整定時において設定値と一致
した流量が？１）られる制御信号である。Control signal target value 1 (2 is a control signal for which the flow rate that matches the set value at the time of settling is ?1).
差△Ｆが、許容値εよりも小さいときは、フィードバッ
ク制御に移る。又、設定時間Ｔが設５ｉ４時間ＴＳ２よ
り大きいときけ、フィードバック制御に移る。When the difference ΔF is smaller than the allowable value ε, the process shifts to feedback control. Further, when the set time T is larger than the set time TS2, the process shifts to feedback control.
次に制御信号目標値Ｒ２を求める方法を示す。Next, a method for determining the control signal target value R2 will be described.
目標値Ｒ１を求めるとき、弁前後の差圧を△Ｐ １とし
たが、この値に誤差があれば、流量は設定値とならない
。そこで、計測された流量Ｑ１（−ＦＳ ）及びこのと
きの弁のＣｖ値から、（１）式を利用して実際の弁差圧
△Ｐ２を求める。When determining the target value R1, the differential pressure before and after the valve is set to ΔP1, but if there is an error in this value, the flow rate will not reach the set value. Therefore, from the measured flow rate Q1 (-FS) and the Cv value of the valve at this time, the actual valve differential pressure ΔP2 is determined using equation (1).
この△Ｐ２を（２）式に代入し、流Ｉｉｔ′設定値Ｑ２
（・、 Ｆ ８ Ｅ Ｔ ）を流すのに必要な弁Ｃｖ値
を次式で求める。Substituting this △P2 into equation (2), the flow Iit' setting value Q2
The valve Cv value required to flow (., F 8 ET ) is determined using the following formula.
ＬｉＪ下１゛１標値Ｒ１を設定した場合と同様にして。Do the same thing as when setting LiJ lower 1゛1 target value R1.
制御部′ｉｊ′［−１標Ｍ１（２を求められる。Control unit 'ij' [-1 mark M1 (2 is calculated.
以ト詳記したように本発明は、所定期間毎に又は所定状
状態になった後流量信号を受けて設定値との偏差を零と
するような制御信号を作成して流量の制御を行う流量制
御装置において。As described in detail above, the present invention controls the flow rate by receiving a flow rate signal every predetermined period or after a predetermined state is reached, and creating a control signal that makes the deviation from the set value zero. In flow control devices.
制御開始時から所定時間経過し、かつ流量信号と設定値
との偏差が所定偏差内になったことを制御判断手段が判
断し、この判断の後フィードバック制御手段がフィード
バンク制御を開始するものである。The control determining means determines that a predetermined time has elapsed from the start of the control and the deviation between the flow rate signal and the set value is within a predetermined deviation, and after this determination, the feedback control means starts the feed bank control. be.
したがって本発明によれば、流量信号が設定値近傍に達
してからはじめてフィードバック制御が実行されるので
、振動が発生せずしかも速やかに設定値に収束できる流
に制御を行なうことができる。Therefore, according to the present invention, since feedback control is executed only after the flow rate signal reaches the vicinity of the set value, it is possible to control the flow so that vibration does not occur and the flow can quickly converge to the set value.
第１図ないし第５図は１本発明の詳細な説明するだめの
図であって、第１図は構成図、第２図および第３図は制
御信号目標値を求めるだめの説明図、第４図は制御フロ
ーチャート、第５図は制御過程図、第６図は従来におけ
るバッチ制御方法の制御過程図である。
１・・・配管、２・・・ポンプ、３・・・流星検出器、
４・・・制御部、５・・・制御弁
第１記
第２凹
第３圓
弁リフト量1 to 5 are diagrams for explaining the details of the present invention, in which FIG. 1 is a configuration diagram, FIGS. 2 and 3 are explanatory diagrams for determining a control signal target value, and FIG. 4 is a control flowchart, FIG. 5 is a control process diagram, and FIG. 6 is a control process diagram of a conventional batch control method. 1... Piping, 2... Pump, 3... Meteor detector,
4... Control unit, 5... Control valve 1st, 2nd concave, 3rd circular valve lift amount
Claims (1)
号を作成して制御弁に送出し流量を制御するものにおい
て、制御開始時から所定時間経過後に実流量信号と制御
信号目標値との偏差が所定偏差内になった時点を判断す
る制御判断手段を備え、この制御判断手段による判断時
から前記フィードバック制御を開始することを特徴とす
る流量制御装置。In a device that receives a measured flow rate signal, creates a control signal that makes the deviation from the set value zero, and sends it to the control valve to control the flow rate, the actual flow rate signal and the control signal target value are 1. A flow rate control device comprising a control determining means for determining when a deviation of the flow rate becomes within a predetermined deviation, and starting the feedback control from the time of determination by the control determining means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15276385A JPS6214201A (en) | 1985-07-11 | 1985-07-11 | Flow rate control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15276385A JPS6214201A (en) | 1985-07-11 | 1985-07-11 | Flow rate control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6214201A true JPS6214201A (en) | 1987-01-22 |
Family
ID=15547613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15276385A Pending JPS6214201A (en) | 1985-07-11 | 1985-07-11 | Flow rate control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6214201A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006346537A (en) * | 2005-06-14 | 2006-12-28 | Hoshizaki Electric Co Ltd | Electrolyzed water generator |
| JP2013525870A (en) * | 2010-04-27 | 2013-06-20 | 日立金属株式会社 | On-tool and on-site MFC optimization methods and systems for consistent response |
| CN115857568A (en) * | 2022-05-16 | 2023-03-28 | 东京流量仪器仪表株式会社 | Flow rate control device |
| CN116185086A (en) * | 2022-05-16 | 2023-05-30 | 东京流量仪器仪表株式会社 | Flow control device |
-
1985
- 1985-07-11 JP JP15276385A patent/JPS6214201A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006346537A (en) * | 2005-06-14 | 2006-12-28 | Hoshizaki Electric Co Ltd | Electrolyzed water generator |
| JP2013525870A (en) * | 2010-04-27 | 2013-06-20 | 日立金属株式会社 | On-tool and on-site MFC optimization methods and systems for consistent response |
| CN115857568A (en) * | 2022-05-16 | 2023-03-28 | 东京流量仪器仪表株式会社 | Flow rate control device |
| CN116185086A (en) * | 2022-05-16 | 2023-05-30 | 东京流量仪器仪表株式会社 | Flow control device |
| KR102553311B1 (en) * | 2022-05-16 | 2023-07-07 | 도플로 코포레이션 가부시키가이샤 | Flow rate control device |
| JP2023168989A (en) * | 2022-05-16 | 2023-11-29 | 東フロコーポレーション株式会社 | Flow controller |
| CN116185086B (en) * | 2022-05-16 | 2024-03-29 | 东京流量仪器仪表株式会社 | Flow control device |
| US12001231B2 (en) | 2022-05-16 | 2024-06-04 | Toflo Corporation | Flow rate control device |
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