JP4335860B2 - Winding temperature control device and control method - Google Patents
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- 熱間圧延機で圧延された鋼板を、熱間圧延機の出側に備えられた冷却装置で冷却し、ダウンコイラで巻取られる前の鋼板の温度を所定の目標温度に制御する巻取り温度制御装置において、
前記冷却装置に備えられた多数の冷却ヘッダーの開放順序の優先関係を格納している冷却ヘッダー優先順位テーブルと、
前記鋼板の巻取り温度を推定するための板温推定モデルと、
前記冷却ヘッダーの開閉の組み合わせであるヘッダーパターンを前記冷却ヘッダー優先順位テーブルの情報を用いて生成した制御コードと対応づけした上で、解を求めるために与えられた所与の制御コード、熱間圧延機出側の鋼板温度の推定値、及び鋼板の速度に関する情報から、前記板温推定モデルを用いて前記鋼板の巻取り温度を推定し、この推定した巻取り推定温度が目標巻取り温度に近づくように前記所与の制御コードを更新して目標巻取り温度を実現するための解となる制御コードを得て出力するプリセット制御手段と、
該プリセット制御手段が出力した制御コードをヘッダーパターンに変換して前記冷却装置に出力するヘッダーパターン変換手段と、を含んで構成されることを特徴とする巻取り温度制御装置。 Winding temperature control that cools the steel sheet rolled by the hot rolling mill with a cooling device provided on the outlet side of the hot rolling mill and controls the temperature of the steel sheet before being wound by the downcoiler to a predetermined target temperature. In the device
A cooling header priority table storing a priority relationship of an opening order of a plurality of cooling headers provided in the cooling device;
A plate temperature estimation model for estimating the coiling temperature of the steel plate;
The header pattern, which is a combination of the opening and closing of the cooling header, is associated with the control code generated using the information of the cooling header priority table, and then given control code given to obtain a solution , hot estimates on the delivery side of the rolling mill of a steel sheet temperature, and information whether et related to the velocity of the steel sheet, the sheet temperature using the estimated model estimates the winding temperature of the steel sheet, coiling the estimated temperature target winding that this estimated Preset control means for obtaining and outputting a control code as a solution for realizing the target winding temperature by updating the given control code so as to approach the temperature;
A winding temperature control device comprising: header pattern conversion means for converting a control code output from the preset control means into a header pattern and outputting the header code to the cooling device. - 前記制御コードは、すべてのヘッダーが開いた状態を最大値、すべてのヘッダーが閉じた状態を最小値とし、制御コードの増加に伴い、前記巻取り温度の推定値が単調に減少するように対応づけられていることを特徴とする請求項1記載の巻取り温度制御装置。 The control code has a maximum value when all headers are open, and a minimum value when all headers are closed, and the estimated value of the coiling temperature decreases monotonously as the control code increases. The winding temperature control device according to claim 1, wherein the winding temperature control device is attached.
- 前記制御コードは、すべてのヘッダーが開いた状態を最小値、すべてのヘッダーが閉じた状態を最大値とし、制御コードの増加に伴い、前記巻取り温度の推定値が単調に増加するように対応づけられていることを特徴とする請求項1記載の巻取り温度制御装置。 The control code has a minimum value when all headers are open and a maximum value when all headers are closed, and the estimated value of the coiling temperature increases monotonically as the control code increases. The winding temperature control device according to claim 1, wherein the winding temperature control device is attached.
- 前記制御コードは、すべてのヘッダーが開いた状態を最大値、すべてのヘッダーが閉じた状態を最小値とし、制御コードの増加に伴い、前記巻取り温度の推定値が単調に減少するように対応づけられ、
前記プリセット制御手段は、制御コードの最大値と最小値をそれぞれ第1の制御コードと第2の制御コードとし、この第1の制御コードと第2の制御コードの平均値を第3の制御コードとして算出し、この算出した第3の制御コードを前記所与の制御コードとして、この第3の制御コードに対応したヘッダーパターンで巻取り温度を推定し、推定結果が前記目標巻取り温度より大きい場合には前記第3の制御コードを改めて前記第2の制御コードとし、逆に、推定結果が前記目標巻取り温度より小さい場合には前記第3の制御コードを改めて前記第1の制御コードとして、第3の制御コードを更新するための演算を、あらかじめ定められた計算終了条件を満足するまで繰り返すことを特徴とする請求項1記載の巻取り温度制御装置。 The control code has a maximum value when all headers are open, and a minimum value when all headers are closed, and the estimated value of the coiling temperature decreases monotonously as the control code increases. Attached,
The preset control means sets the maximum value and the minimum value of the control code as the first control code and the second control code, respectively, and sets the average value of the first control code and the second control code as the third control code. The winding temperature is estimated with a header pattern corresponding to the third control code using the calculated third control code as the given control code, and the estimation result is larger than the target winding temperature. In this case, the third control code is changed to the second control code. Conversely, when the estimation result is smaller than the target winding temperature, the third control code is changed to the first control code. third calculation for updating the control code, coiling temperature control device according to claim 1, wherein a repeated until satisfying the predetermined computation termination condition. - 前記制御コードは、すべてのヘッダーが開いた状態を最小値、すべてのヘッダーが閉じた状態を最大値とし、制御コードの増加に伴い、前記巻取り温度の推定値が単調に増加するように対応づけられ、
前記プリセット制御手段は、制御コードの最大値と最小値をそれぞれ第1の制御コードと第2の制御コードとし、この第1の制御コードと第2の制御コードの平均値を第3の制御コードとして算出し、この算出した第3の制御コードを前記所与の制御コードとして、この第3の制御コードに対応したヘッダーパターンで巻取り温度を推定し、推定結果が前記目標巻取り温度より大きい場合には前記第3の制御コードを改めて前記第1の制御コードとし、逆に、推定結果が前記目標巻取り温度より小さい場合には前記第3の制御コードを改めて第2の制御コードとして、第3の制御コードを更新するための演算を、あらかじめ定められた計算終了条件を満足するまで繰り返すことを特徴とする請求項1記載の巻取り温度制御装置。 The control code has a minimum value when all headers are open and a maximum value when all headers are closed, and the estimated value of the coiling temperature increases monotonically as the control code increases. Attached,
The preset control means sets the maximum value and the minimum value of the control code as the first control code and the second control code, respectively, and sets the average value of the first control code and the second control code as the third control code. The winding temperature is estimated with a header pattern corresponding to the third control code using the calculated third control code as the given control code, and the estimation result is larger than the target winding temperature. In this case, the third control code is changed to the first control code. Conversely, when the estimation result is smaller than the target winding temperature, the third control code is changed to the second control code. third calculation for updating the control code, coiling temperature control device according to claim 1, wherein a repeated until satisfying the predetermined computation termination condition. - 前記プリセット制御手段は、前記制御コードを前記鋼板の長手方向の各部位に対応づけて算出して出力し、前記ヘッダーパターン変換手段は各ヘッダーの直下の鋼板の長手方向の部位を認識した上で、部位と対応した制御コードを抽出し、これをヘッダーパターンに変換して冷却装置に出力することを特徴とする請求項1乃至3の何れかに記載の巻取り温度制御装置。 The preset control means calculates and outputs the control code in association with each part in the longitudinal direction of the steel sheet, and the header pattern conversion means recognizes the part in the longitudinal direction of the steel sheet directly under each header. The winding temperature control device according to any one of claims 1 to 3, wherein a control code corresponding to the part is extracted, converted into a header pattern, and output to a cooling device.
- 前記プリセット制御手段は、前記鋼板の長手方向の各部位に対する前記制御コードの値が前後の部位に比べて大きいか小さい場合には、該制御コードを前または後ろの制御コードと一致させる処理を前記鋼板の全長で繰り返すことで、前記鋼板の払い出しから巻取りまで鋼板長手方向の制御コードの変化が単峰性の関数になるように制御コードを修正するスムージング手段を備えたことを特徴とする請求項1乃至6の何れかに記載の巻取り温度制御装置。 The preset control means, when the value of the control code for each part in the longitudinal direction of the steel sheet is larger or smaller than the preceding and following parts, the process of matching the control code with the front or rear control code It is characterized by comprising smoothing means for correcting the control code so that the change in the control code in the longitudinal direction of the steel sheet is a function of unimodality from repetition to winding of the steel sheet by repeating over the entire length of the steel sheet. coiling temperature control device according to any one of claims 1 to 6.
- 熱間圧延機で圧延された鋼板を、該熱間圧延機の出側に備えられた冷却装置で冷却し、ダウンコイラで鋼板が巻取られる前の鋼板の温度を所定の目標温度に制御する巻取り温度制御方法において、
プリセット制御手段は、前記冷却装置に備えられた冷却ヘッダーの開閉の組み合わせであるヘッダーパターンを前記冷却ヘッダーの優先順位を格納したテーブルの情報を用いて生成した制御コードと対応づけした上で、解を求めるために与えられた所与の制御コード、熱間圧延機出側の鋼板温度の推定値、及び鋼板の速度に関する情報から、前記板温推定モデルを用いて前記鋼板の巻取り温度を推定し、この推定した巻取り推定温度が目標巻取り温度に近づくように前記所与の制御コードを更新して目標巻取り温度を実現するための解となる制御コードを得て出力し、該制御コードをヘッダーパターンに変換して前記冷却装置に出力することを特徴とする巻取り温度制御方法。 A steel sheet rolled by a hot rolling mill is cooled by a cooling device provided on the outlet side of the hot rolling mill, and the temperature of the steel sheet before the steel sheet is wound by the downcoiler is controlled to a predetermined target temperature. In the temperature control method,
The preset control means associates a header pattern, which is a combination of opening and closing of the cooling header provided in the cooling device, with a control code generated using information in a table storing the priority order of the cooling header, and then solves the problem. given control code given to determine the estimated value of the steel sheet temperature of the hot rolling mill exit side, and information whether et related to the velocity of the steel sheet, the coiling temperature of the steel sheet by using the metal temperature estimation model , And update the given control code so that the estimated coiling estimated temperature approaches the target coiling temperature to obtain and output a control code that is a solution for realizing the target coiling temperature, A winding temperature control method, wherein the control code is converted into a header pattern and output to the cooling device. - 前記制御コードは、すべてのヘッダーが開いた状態を最大値、すべてのヘッダーが閉じた状態を最小値とし、制御コードの増加に伴い、前記巻取り温度の推定値が単調に減少するように対応づけられていて、
前記制御コードの最大値と最小値をそれぞれ第1の制御コードと第2の制御コードとし、この第1の制御コードと第2の制御コードの平均値を第3の制御コードとして算出し、この算出した第3の制御コードを前記所与の制御コードとして、この第3の制御コードに対応したヘッダーパターンで巻取り温度を推定し、推定結果が前記目標巻取り温度より大きい場合には前記第3の制御コードを改めて前記第2の制御コードとし、逆に、推定結果が前記目標巻取り温度より小さい場合には前記第3の制御コードを改めて前記第1の制御コードとして、第3の制御コードを更新するための演算を、あらかじめ定められた計算終了条件を満足するまで繰り返すことを特徴とする請求項8記載の巻取り温度制御方法。 The control code has a maximum value when all headers are open, and a minimum value when all headers are closed, and the estimated value of the coiling temperature decreases monotonously as the control code increases. Attached,
The maximum value and the minimum value of the control code are set as a first control code and a second control code, respectively, and an average value of the first control code and the second control code is calculated as a third control code. Taking the calculated third control code as the given control code, the winding temperature is estimated with a header pattern corresponding to the third control code. If the estimation result is smaller than the target coiling temperature, the third control code is changed to the first control code and the third control code is changed to the second control code. The winding temperature control method according to claim 8, wherein the operation for updating the code is repeated until a predetermined calculation end condition is satisfied. - 前記制御コードは、すべてのヘッダーが開いた状態を最大値、すべてのヘッダーが閉じた状態を最小値とし、制御コードの増加に伴い、前記巻取り温度の推定値が単調に減少するように対応づけられていて、
前記制御コードの最大値と最小値をそれぞれ第1の制御コードと第2の制御コードとし、この第1の制御コードと第2の制御コードの平均値を第3の制御コードとして算出し、この算出した第3の制御コードを前記所与の制御コードとして、この第3の制御コードに対応したヘッダーパターンで巻取り温度を推定し、推定結果が前記目標巻取り温度より大きい場合には前記第3の制御コードを改めて前記第1の制御コードとし、逆に、推定結果が前記目標巻取り温度より小さい場合には前記第3の制御コードを改めて第2の制御コードとして、第3の制御コードを更新するための演算を、あらかじめ定められた計算終了条件を満足するまで繰り返すことを特徴とする請求項8記載の巻取り温度制御方法。 The control code has a maximum value when all headers are open, and a minimum value when all headers are closed, and the estimated value of the coiling temperature decreases monotonously as the control code increases. Attached,
The maximum value and the minimum value of the control code are set as a first control code and a second control code, respectively, and an average value of the first control code and the second control code is calculated as a third control code. Taking the calculated third control code as the given control code, the winding temperature is estimated with a header pattern corresponding to the third control code. If the estimation result is smaller than the target coiling temperature, the third control code is changed to the second control code and the third control code is changed to the first control code. The winding temperature control method according to claim 8, wherein the operation for updating is repeated until a predetermined calculation end condition is satisfied. - 前記プリセット制御手段は、前記鋼板を長手方向にメッシュに分割し、前記制御コードを各メッシュに対応づけてそれぞれ算出し、各ヘッダー直下のメッシュを認識した上で、メッシュと対応した制御コードを抽出し、これをヘッダーパターンに変換して冷却装置に出力することを特徴とする請求項8乃至10の何れかに記載の巻取り温度制御方法。 The preset control means divides the steel plate into meshes in the longitudinal direction, calculates the control code in association with each mesh, recognizes the mesh directly under each header, and extracts the control code corresponding to the mesh. The coiling temperature control method according to any one of claims 8 to 10, wherein this is converted into a header pattern and output to a cooling device.
- 前記鋼板の長手方向の各部位に対する前記制御コードの値が前後の部位に比べて大きいか小さい場合には、該制御コードを前または後ろの制御コードと一致させる処理を前記鋼板の全長で繰り返すことで、前記鋼板の払い出しから巻取りまで鋼板長手方向の制御コードが単峰性に変化するように制御コードを微調整することを特徴とする請求項8乃至11の何れかに記載の巻取り温度制御方法。 When the value of the control code for each part in the longitudinal direction of the steel sheet is larger or smaller than the preceding and following parts, the process of matching the control code with the front or rear control code is repeated for the entire length of the steel sheet. The coiling temperature according to any one of claims 8 to 11, wherein the control code is finely adjusted so that the control code in the longitudinal direction of the steel sheet changes to a single peak from the discharging and winding of the steel sheet. Control method.
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