JPH0257640A - Method for controlling tension in furnace in continuous annealing equipment - Google Patents
Method for controlling tension in furnace in continuous annealing equipmentInfo
- Publication number
- JPH0257640A JPH0257640A JP20632788A JP20632788A JPH0257640A JP H0257640 A JPH0257640 A JP H0257640A JP 20632788 A JP20632788 A JP 20632788A JP 20632788 A JP20632788 A JP 20632788A JP H0257640 A JPH0257640 A JP H0257640A
- Authority
- JP
- Japan
- Prior art keywords
- tension
- furnace
- steel strip
- carriage
- signal
- 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
- 238000000137 annealing Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims description 14
- 238000004364 calculation method Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 abstract 7
- 239000010959 steel Substances 0.000 abstract 7
- 238000013016 damping Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Control Of Heat Treatment Processes (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、連続焼鈍設備におけるストリップの炉内張力
制御方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for controlling the tension in a strip furnace in a continuous annealing facility.
連続焼鈍設備においては、炉内張力変動をなくするため
、たとえば第３図に示す設備構成で、ストリップの炉内
張力制御を行っている。第３図の設備構成は、炉４外で
ストリップ５の張力骨動が発生し、炉４側へ波及してく
ると、ブライドルロール２の上流に設置した張力計１か
ら制御装置３へ張カフイートノζツク信号６として張力
変動を表す信号を与え、制御袋＃３は張力フィードバッ
ク信号６を比例倍し速度設定値を加えた速度指令信号７
でブライドルロール２を駆動する。これにより、ス）
ＩＪツブ５の張力変動は張力計１の位置で、制御され、
炉内張力変動をおさえている。In continuous annealing equipment, in order to eliminate fluctuations in the tension in the furnace, the tension in the furnace of the strip is controlled using the equipment configuration shown in FIG. 3, for example. In the equipment configuration shown in FIG. 3, when the tension bone motion of the strip 5 occurs outside the furnace 4 and spreads to the furnace 4 side, the tension meter 1 installed upstream of the bridle roll 2 transmits the tension cuff wire to the control device 3. A signal representing the tension fluctuation is given as the ζtsuku signal 6, and the control bag #3 outputs a speed command signal 7 which is the result of proportionally multiplying the tension feedback signal 6 and adding the speed setting value.
to drive bridle roll 2. This allows
The tension fluctuation of the IJ knob 5 is controlled by the position of the tension meter 1,
Suppresses tension fluctuations in the furnace.
上記従来のストリップに対する炉内張力制御方法には解
決すべき次の課題があった。即ち、従来の方法は既に述
べた通り、張力変動が発生するとブライドルロールの速
度制御系を働かせて速度を変え、炉内張力変動をおさえ
るというものである。The above-mentioned conventional method for controlling tension in a furnace for strips has the following problems to be solved. That is, as mentioned above, in the conventional method, when a tension fluctuation occurs, the speed control system of the bridle roll is activated to change the speed, thereby suppressing the tension fluctuation in the furnace.
従って、張力制御系にはブライドルロールの速度制御系
の遅れがあり、この為、キャリッジ移動直後に発生する
ステップ状に近い張力変動外乱に対し、大きな炉内張力
変動が生じるという問題があった。Therefore, the tension control system has a delay in the speed control system of the bridle roll, which causes a problem in that a large tension fluctuation occurs in the furnace in response to a nearly step-like tension fluctuation disturbance that occurs immediately after the carriage moves.
本発明は上記課題の解決手段として連続焼鈍設備におけ
る制御装置のブライドルロールに張力計からのフィード
バック信号をもとに演算した結果得られる信号を与え、
速度を操作し、炉内張力を制御する方法において、ルー
パーのキャリッジを上下移動させた時に発生する張力変
動外乱に対しては、プライト９ルロールがこれに対抗す
るトルクをもつよう制御装置においてモデルを使って予
め予測計算した信号を、キャリッジを移％ｌＩさせるべ
くキャリッジ駆動モータへの操作信号の印加と同時にブ
ライドルロールに与え、炉側への張力変動の波及を防止
する予測制御を加えることを特徴とする連続焼鈍設備の
炉内張力制御方法を提供しようとするものである。As a means of solving the above problems, the present invention provides a signal obtained as a result of calculation based on a feedback signal from a tension meter to a bridle roll of a control device in a continuous annealing facility,
In the method of controlling the tension in the furnace by manipulating the speed, a model is created in the control device so that the prite 9 roll has a torque that counteracts the tension fluctuation disturbance that occurs when the looper carriage is moved up and down. A signal that is predicted and calculated in advance is applied to the bridle roll at the same time as an operation signal is applied to the carriage drive motor to move the carriage, and predictive control is added to prevent tension fluctuations from spreading to the furnace side. The purpose of the present invention is to provide a method for controlling the tension in the furnace of continuous annealing equipment.
本発明は上記のように構成されるので次の作用を有する
。即ち、制御装置では、ルー、ｅ−作動前に、予め与え
た式のモデルと予めわかっている付加力とから、張力変
動外乱の時間応答をｎＩ算しておく。これを、張力変動
外乱予測値とし、さらに、この予測値に対抗するブライ
ドルロールのトルクを割成から計算する。Since the present invention is configured as described above, it has the following effects. That is, the control device calculates the time response of the tension fluctuation disturbance nI from the model of the equation given in advance and the additional force known in advance before the operation. This is used as the tension fluctuation disturbance prediction value, and the torque of the bridle roll that opposes this prediction value is calculated from the split.
そしてキャリッジを移動させるべくキャリッジ駆動モー
タに付加力を発生させるための操作信号が加わると同時
に、制御装置は上述した予測計算によって得られた、上
記トルクがブライト１ルロールに発生する速度指令信号
を従来のフィードバックによる速度指令信号に加え、こ
れを新たな速度指令信号として、ブライドルロールを駆
動する。Then, at the same time that an operation signal is applied to the carriage drive motor to generate additional force to move the carriage, the control device sends a speed command signal, which is obtained by the above-mentioned predictive calculation, at which the torque will be generated on the bright 1 roll. In addition to the speed command signal based on the feedback of , this is used as a new speed command signal to drive the bridle roll.
これにより炉内張力変動が消失ないしは低減する。This eliminates or reduces tension fluctuations within the furnace.
本発明の一実施し１１の制御方法について第１図ないし
第３図を援用して説明する。A control method according to an eleventh embodiment of the present invention will be described with reference to FIGS. 1 to 3.
従来と同様、第３図に示すように、張力計１で張力を検
出し、制御装置ｔ３により、ブライドルロールル２の速
度をかえて、炉内張力制御を行う。ただし、制御装置３
では、第１図に示すようにキャリッ：）１３を移動させ
るべくキャリッジ駆動モータ１２に付加力ＦＭを発生さ
せるための操作信号が加わると同時に、張力フィードバ
ック信号を比例倍し速肚設定値を加えた従来の速度指令
信号に、張力変動外乱ＦＤに対抗するトルクが発生する
予め予測計算した速度指令信号を加え、これを新たな速
度指令信号として、ブライドルロール２を駆動する。ま
た、キャリッジ】３の移動時以外は従来の制御を行う。As in the conventional case, as shown in FIG. 3, the tension is detected by the tension meter 1, and the speed of the bridle roll 2 is changed by the control device t3 to control the tension in the furnace. However, control device 3
Now, as shown in Fig. 1, an operation signal for generating additional force FM is applied to the carriage drive motor 12 in order to move the carriage 13, and at the same time, the tension feedback signal is multiplied proportionally and a speed setting value is added. A pre-predicted and calculated speed command signal that generates a torque to counter the tension fluctuation disturbance FD is added to the conventional speed command signal, and the bridle roll 2 is driven using this as a new speed command signal. Further, conventional control is performed except when the carriage [3] is moved.
以上、制御力法のプロセスについて股間したが次に張力
変動外乱ＦＤを４式によって代数的に求め、逐次、トル
クＴＭを求めて行なう本実施例の制御の実際について説
明する。Having described the process of the control force method above, we will now explain the actual control of this embodiment in which the tension fluctuation disturbance FD is algebraically determined using the four formulas, and the torque TM is sequentially determined.
連続焼鈍設備においては、例えば第３図に示す設備構成
で炉内張力制御を行っているが、ルーパーを會めると、
例えば第１図に示す設備構成になる。不実施例による炉
内張力制御方法では、ルーパー１１のキャリッジ１３を
上下移動させるために発生させるキャリッジ駆動モータ
】２の付加力ＦＭに対する張力変動外乱ＦＤの（１）式
に示す動的なモデルを、制御装置３にもたせておく。In continuous annealing equipment, for example, the furnace tension is controlled using the equipment configuration shown in Figure 3, but when the looper is assembled,
For example, the equipment configuration is shown in FIG. In the furnace tension control method according to the non-embodiment, a dynamic model shown in equation (1) of the tension fluctuation disturbance FD with respect to the additional force FM of the carriage drive motor 2 generated to move the carriage 13 of the looper 11 up and down is used. , the control device 3 is also provided.
付加力ＦＭは、キャリッジ停止時のカＦの５係程度でス
テップ状であり、予め設定されており。The additional force FM is step-like and is set in advance by approximately 5 factors of the force F when the carriage is stopped.
力ＦＫ上乗せするものである。This is to add force FK.
る固有振動数＜ ｒａｄ’ｓ ＞
ζ１ ニブライドルロールの速度制御系による減衰率（
−）
Ｗ２ニル−バーの縦方向の固有振動数
（ｒａａ／ｓ ）
ζ２ ニル−バーの縦方向の減衰率（−）Ｗ３ニル−バ
ーの回転方向の固有振動数（ｒａｄ／ｓ ）
ζ３ ニル−・瘤−の回転方向の減衰率（−）制御装置
３では、ルー、ｅ −１１作動前に、＋Ｈ式のモデルと
予めわかっている付加力ＦＭから、張力変動外乱ＦＤの
時間応答を計算しておく。これを、張力変動外乱予測値
ＦＤとし、さらに、ＦＤ’に対抗するブライト９ルロー
ル２のトルクＴＭを（２）式から計算しておく。Natural frequency <rad's> ζ1 Damping rate due to the speed control system of the nib bridle roll (
-) W2 Nil-bar's natural frequency in the longitudinal direction (raa/s) ζ2 Nil-bar's longitudinal damping rate (-) W3 Nil-bar's natural frequency in the rotational direction (rad/s) ζ3 Nil-・The damping rate (-) control device 3 in the rotational direction of the knob calculates the time response of the tension fluctuation disturbance FD from the +H equation model and the previously known additional force FM before operating Lou, e-11. I'll keep it. This is set as the tension fluctuation disturbance predicted value FD, and furthermore, the torque TM of the bright 9 roll 2 opposing FD' is calculated from equation (2).
ＴＭ ＝ −！−（−ＦＩｙ） （２１ここ
で ｒニブライト１ルロールの半径幅）Ｎニブライビル
ロールの個数（−）
そして、キャリッジを移動させるべくキャリッジ駆動モ
ータ１２に付加力ＦＭを発生させるための操作信号が加
わると同時に、制御装置３は、上述した予測計算によっ
て得られたブライドルロール２にトルクＴＭが発生する
速度指令信号を従来のフィードバックによる速度指令信
号に加え、これを新たな速度指令信号として、ブライト
９ルロール２を駆動する。TM = -! -(-FIy) (21 where r radial width of one roll of nib light) N number of nib rolls (-) Then, an operation signal is applied to the carriage drive motor 12 to generate additional force FM to move the carriage. At the same time, the control device 3 adds the speed command signal that generates the torque TM to the bridle roll 2 obtained by the above-mentioned predictive calculation to the speed command signal based on conventional feedback, and uses this as a new speed command signal to control the brightness 9. drive the roll roll 2.
第２図は上記のようにして得られる張力変動外乱予測値
の例を示すグラフである。FIG. 2 is a graph showing an example of the tension fluctuation disturbance prediction value obtained as described above.
本発明は上記のように構成されるので次の効果を有する
。即ち、キャリッジの移動時に、従来の制御に予測制御
を加えることで、ブライドルロールに張力？（動′４乱
に対抗するべくトルクを張力変動外乱に遅れることなく
発生させることができ、キャリッジ移動時においては従
来の制御方法よりも炉内張力変動をより適確におさえる
ことができる。Since the present invention is configured as described above, it has the following effects. In other words, by adding predictive control to conventional control when moving the carriage, tension can be applied to the bridle roll. (Torque can be generated without delay to the tension fluctuation disturbance in order to counter the dynamic disturbance, and when the carriage is moved, the tension fluctuation in the furnace can be suppressed more accurately than the conventional control method.
第１図は本発明の一実施例の制御方法の説明のための設
備構成図、第２図は上記実施例の制御法において計算さ
れる張力変動外乱予測値の例を示すグラフ、第３図は従
来の制御法の説明のための設備構成図である。
ｌ・・・張力計 ２・・・プライト１ルロール
３・・・制御装置 ４・・・炉
５・・・ストリップ ６・・・張カフィードバック
信号７・・・速度指令信号 １１・・・ルーパー１２
・・・キャリッジ駆動モータ
１３・・・キャリッジFIG. 1 is an equipment configuration diagram for explaining a control method according to an embodiment of the present invention, FIG. 2 is a graph showing an example of a predicted tension fluctuation disturbance value calculated in the control method of the above embodiment, and FIG. 3 is an equipment configuration diagram for explaining a conventional control method. l... Tension meter 2... Prite 1 Roll 3... Control device 4... Furnace 5... Strip 6... Tension feedback signal 7... Speed command signal 11... Looper 12
... Carriage drive motor 13 ... Carriage
Claims (1)
力計からのフィードバック信号をもとに演算した結果得
られる信号を与え、速度を操作し、炉内張力を制御する
方法において、ルーパーのキャリッジを上下移動させた
時に発生する張力変動外乱に対しては、ブライドルロー
ルがこれに対抗するトルクをもつよう制御装置において
モデルを使って予め予測計算した信号を、キャリッジを
移動させるべくキャリッジ駆動モータへの操作信号の印
加と同時にブライドルロールに与え、炉側への張力変動
の波及を防止する予測制御を加えることを特徴とする連
続焼鈍設備の炉内張力制御方法。In a method of controlling the tension in the furnace by giving a signal obtained by calculation based on the feedback signal from the tension meter to the bridle roll of the control device in continuous annealing equipment, the speed is controlled and the carriage of the looper is moved up and down. In response to the tension fluctuation disturbance that occurs when the bridle roll has a torque that counteracts this, the controller uses a model to predict and calculate the signal in advance, and sends an operation signal to the carriage drive motor to move the carriage. A method for controlling tension in a furnace of continuous annealing equipment, characterized by applying predictive control to a bridle roll at the same time as application of tension to prevent tension fluctuations from spreading to the furnace side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20632788A JPH0257640A (en) | 1988-08-22 | 1988-08-22 | Method for controlling tension in furnace in continuous annealing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20632788A JPH0257640A (en) | 1988-08-22 | 1988-08-22 | Method for controlling tension in furnace in continuous annealing equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0257640A true JPH0257640A (en) | 1990-02-27 |
Family
ID=16521463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20632788A Pending JPH0257640A (en) | 1988-08-22 | 1988-08-22 | Method for controlling tension in furnace in continuous annealing equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0257640A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0460303U (en) * | 1990-09-27 | 1992-05-25 | ||
| KR100771833B1 (en) * | 2001-12-24 | 2007-10-30 | 주식회사 포스코 | Strip loop control method of continuous annealing furnace |
| CN103834793A (en) * | 2012-11-22 | 2014-06-04 | 宝山钢铁股份有限公司 | Method for monitoring distribution of internal tension of continuous annealing horizontal furnace |
-
1988
- 1988-08-22 JP JP20632788A patent/JPH0257640A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0460303U (en) * | 1990-09-27 | 1992-05-25 | ||
| KR100771833B1 (en) * | 2001-12-24 | 2007-10-30 | 주식회사 포스코 | Strip loop control method of continuous annealing furnace |
| CN103834793A (en) * | 2012-11-22 | 2014-06-04 | 宝山钢铁股份有限公司 | Method for monitoring distribution of internal tension of continuous annealing horizontal furnace |
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