JPH0314106B2 - - Google Patents
Info
- Publication number
- JPH0314106B2 JPH0314106B2 JP23069185A JP23069185A JPH0314106B2 JP H0314106 B2 JPH0314106 B2 JP H0314106B2 JP 23069185 A JP23069185 A JP 23069185A JP 23069185 A JP23069185 A JP 23069185A JP H0314106 B2 JPH0314106 B2 JP H0314106B2
- Authority
- JP
- Japan
- Prior art keywords
- speed
- control
- valve
- valve body
- 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.)
- Expired
Links
- 238000001514 detection method Methods 0.000 description 11
- 230000004044 response Effects 0.000 description 6
- 238000013016 damping Methods 0.000 description 4
- 230000004043 responsiveness Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Electrically Driven Valve-Operating Means (AREA)
Description
【発明の詳細な説明】
＜技術分野＞
本発明は閉ループ制御により調節弁の開度を制
御するバルブ操作器に関する。DETAILED DESCRIPTION OF THE INVENTION <Technical Field> The present invention relates to a valve operator that controls the opening degree of a control valve by closed-loop control.
＜従来技術＞
従来、電動式調節弁の開度を制御する閉ループ
制御系からなるバルブ操作器では、調節系の弁体
の位置制御において流体の圧力や粘性等の変動に
由来する負荷変動により制御の応答性が変化す
る。この負荷変動による応答性の変化は、制御性
を低下させる。また、この閉ループ制御系におい
ては、最適な応答性を得るためにループ応答ゲイ
ンを積極的に変える必要性が生じる場合がある。<Prior art> Conventionally, in a valve operating device consisting of a closed-loop control system that controls the opening degree of an electric control valve, the position control of the valve body of the control system is controlled by load fluctuations resulting from fluctuations in fluid pressure, viscosity, etc. responsiveness changes. Changes in responsiveness due to load fluctuations degrade controllability. Furthermore, in this closed-loop control system, it may be necessary to actively change the loop response gain in order to obtain optimal responsiveness.
＜発明の目的＞
本発明は上記事情に鑑みてなされたものであ
り、その目的は、負荷変動により制御の応答性が
変化しないようにするとともに最適な応答速度の
設定ができるようにしたバルブ操作器を提供する
ことである。<Object of the Invention> The present invention has been made in view of the above circumstances, and its object is to provide a valve operation that prevents the control response from changing due to load fluctuations and allows setting of the optimal response speed. It is to provide a vessel.
＜発明の構成＞
本発明は、閉ループ制御により調節弁の弁体の
位置を制御するバルブ操作器において、上記弁体
の位置目標値と位置検出値との偏差に応じた位置
制御値を演算する位置演算手段と、上記弁体を駆
動する電動機の速度を検出する速度検出手段と、
この速度検出手段からの上記電動機の速度と上記
位置演算手段からの上記位置制御値とに応じた速
度制御値を演算する速度演算手段とを備え、上記
速度演算手段からの上記速度制御値に応じて上記
弁体を駆動することを特徴とする。<Structure of the Invention> The present invention is a valve operating device that controls the position of a valve body of a control valve by closed-loop control, and calculates a position control value according to a deviation between a target position value and a detected position value of the valve body. a position calculation means, a speed detection means for detecting the speed of the electric motor that drives the valve body;
speed calculation means for calculating a speed control value according to the speed of the electric motor from the speed detection means and the position control value from the position calculation means; The valve body is characterized in that the valve body is driven by the valve body.
＜実施例＞
以下、本発明の一実施例を図面にもとづいて説
明する。<Example> An example of the present invention will be described below based on the drawings.
図は本実施例のバルブ操作器のブロツク構成を
示す。位置演算部１は、調節弁２の弁体（図示せ
ず）の位置目標値ｒと位置検出部３からの弁体の
位置検出値ｘとの偏差ｚに応じた位置制御値を演
算する。速度検出部４は、調節弁２の弁体を駆動
するモータ５の速度を検出する。速度演算部６
は、速度検出部４からのモータ５の速度ｖと位置
演算部１からの位置制御値とに応じた速度制御値
を演算する。駆動装置７は、速度演算部６からの
速度制御値に応じてモータ５を駆動する。速度設
定ボリユーム８は、設定された最適なループ応答
ゲインを与える速度設定信号を出力する。速度演
算部６には、モータ５の上限速度設定値ｓ及び速
度設定ボリユーム８からの速度設定信号が与えら
れる。 The figure shows the block configuration of the valve operating device of this embodiment. The position calculation section 1 calculates a position control value according to the deviation z between the position target value r of the valve body (not shown) of the control valve 2 and the position detection value x of the valve body from the position detection section 3 . The speed detection unit 4 detects the speed of the motor 5 that drives the valve body of the control valve 2 . Speed calculation section 6
calculates a speed control value according to the speed v of the motor 5 from the speed detection section 4 and the position control value from the position calculation section 1. The drive device 7 drives the motor 5 according to the speed control value from the speed calculation section 6. The speed setting volume 8 outputs a speed setting signal that provides a set optimum loop response gain. The speed calculation unit 6 is supplied with an upper limit speed setting value s of the motor 5 and a speed setting signal from the speed setting volume 8 .
このバルブ操作器は、調節弁２の弁体の位置標
値ｒと弁体の位置検出値ｘとの偏差ｚに応じてモ
ータ５を駆動し、弁体が目標となる位置に停止す
るように制御する閉ループ制御系を構成する。 This valve operating device drives the motor 5 in accordance with the deviation z between the position reference value r of the valve body of the control valve 2 and the detected position value x of the valve body, so that the valve body stops at the target position. Configure a closed-loop control system to control.
速度検出部４を有するフイードバツクループ
は、制御系のダンピング特性を強めて、制御特性
を改善する役割を果たす。すなわち、モータ５は
トルク−速度特性が全域にわたつて垂下特性をそ
なえているが、調節弁２により流量を調節する流
体の圧力や粘性等の変動によりモータ５の負荷変
動が生じたときには、このモータ５の制動定数だ
けではダンピングが不足になる場合が生じる。こ
のため、速度検出部４からのモータ５の速度検出
値ｖに比例した大きさで且つ向きが反対のトルク
をモータ５に生じるように負帰還ループを構成
し、系のダンピングを強める。したがつて、モー
タ５の負荷変動が生じたときにおいても、速やか
に安定状態へ移行することができる。この場合、
最適な応答速度を速度設定ボリユーム８により設
定することができる。 The feedback loop including the speed detection section 4 serves to enhance the damping characteristics of the control system and improve the control characteristics. That is, although the motor 5 has a drooping characteristic over the entire torque-speed characteristic, when the load of the motor 5 changes due to fluctuations in the pressure, viscosity, etc. of the fluid whose flow rate is adjusted by the control valve 2, this There may be cases where the damping is insufficient due to the braking constant of the motor 5 alone. Therefore, a negative feedback loop is configured to generate a torque in the motor 5 that is proportional to the detected speed value v of the motor 5 from the speed detection section 4 and in the opposite direction, thereby increasing the damping of the system. Therefore, even when the load on the motor 5 fluctuates, it is possible to quickly shift to a stable state. in this case,
The optimum response speed can be set using the speed setting volume 8.
なお、速度検出部４は、モータ５の回転軸に直
結された速度発電機で構成され、モータ５の速度
に比例した直流電圧または交流電圧を出力する。 Note that the speed detection section 4 includes a speed generator directly connected to the rotating shaft of the motor 5, and outputs a DC voltage or an AC voltage proportional to the speed of the motor 5.
＜発明の効果＞
以上説明したように、本発明においては、調節
弁の弁体を駆動する電動機の速度を検出し、この
速度検出値を負帰還することにより、制御系のダ
ンピング特性を強めるようにしたので、弁体を駆
動する電動機の負荷変動が生じても制御の応答性
が低下することがなく、しかも、最適な応答速度
の設定により制御を安定して行なうことができ
る。<Effects of the Invention> As explained above, in the present invention, the speed of the electric motor that drives the valve body of the control valve is detected, and the damping characteristic of the control system is strengthened by negative feedback of this detected speed value. Therefore, even if load fluctuations occur in the electric motor that drives the valve body, the responsiveness of the control does not deteriorate, and moreover, the control can be stably performed by setting the optimal response speed.
図面は本発明実施例のブロツク構成図である。
１……位置演算部、２……調節弁、３……位置
検出部、４……速度検出部、５……モータ、６…
…速度演算部、７……駆動装置、ｒ……位置目標
値、ｘ……位置検出値、ｚ……偏差、ｖ……速度
検出値。
The drawing is a block diagram of an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Position calculation part, 2...Control valve, 3...Position detection part, 4...Speed detection part, 5...Motor, 6...
...Speed calculation unit, 7... Drive device, r... Position target value, x... Position detected value, z... Deviation, v... Speed detected value.
Claims (1)
御するバルブ操作器において、上記弁体の位置目
標値と位置検出値との偏差に応じた位置制御値を
演算する位置演算手段と、上記弁体を駆動する電
動機の速度を検出する速度検出手段と、この速度
検出手段からの上記電動機の速度と上記位置演算
手段からの上記位置制御値とに応じた速度制御値
を演算する速度演算手段とを備え、上記速度演算
手段からの上記速度制御値に応じて上記弁体を駆
動することを特徴とするバルブ操作器。1. A valve operating device that controls the position of a valve body of a control valve by closed-loop control, comprising: a position calculation means for calculating a position control value according to a deviation between a position target value and a detected position value of the valve body; a speed detecting means for detecting the speed of an electric motor that drives the motor; and a speed calculating means for calculating a speed control value according to the speed of the electric motor from the speed detecting means and the position control value from the position calculating means. A valve operating device comprising: a valve operating device for driving the valve body according to the speed control value from the speed calculation means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23069185A JPS6293580A (en) | 1985-10-16 | 1985-10-16 | Valve control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23069185A JPS6293580A (en) | 1985-10-16 | 1985-10-16 | Valve control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6293580A JPS6293580A (en) | 1987-04-30 |
| JPH0314106B2 true JPH0314106B2 (en) | 1991-02-26 |
Family
ID=16911796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23069185A Granted JPS6293580A (en) | 1985-10-16 | 1985-10-16 | Valve control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6293580A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6455488A (en) * | 1987-08-26 | 1989-03-02 | Bailey Japan | Actuator for electric adjusting valve |
| JPH01159547A (en) * | 1987-12-14 | 1989-06-22 | Noritz Corp | Hot/cold water mixing device |
| JPH0688616A (en) * | 1991-05-24 | 1994-03-29 | Takashi Nagaoka | Automatically shutting off device for gas |
-
1985
- 1985-10-16 JP JP23069185A patent/JPS6293580A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6293580A (en) | 1987-04-30 |
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