JPH0366407A - Control device for rate of elongation - Google Patents
Control device for rate of elongationInfo
- Publication number
- JPH0366407A JPH0366407A JP1202106A JP20210689A JPH0366407A JP H0366407 A JPH0366407 A JP H0366407A JP 1202106 A JP1202106 A JP 1202106A JP 20210689 A JP20210689 A JP 20210689A JP H0366407 A JPH0366407 A JP H0366407A
- Authority
- JP
- Japan
- Prior art keywords
- rate
- deviation
- elongation rate
- elongation
- control
- 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.)
- Granted
Links
- 230000008859 change Effects 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 14
- 230000004044 response Effects 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 abstract description 19
- 239000010959 steel Substances 0.000 abstract description 19
- 238000005096 rolling process Methods 0.000 abstract description 15
- 230000009467 reduction Effects 0.000 abstract description 8
- 230000007246 mechanism Effects 0.000 abstract description 4
- 230000003111 delayed effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 3
- 238000000137 annealing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002436 steel type Substances 0.000 description 2
- 210000001691 amnion Anatomy 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/56—Elongation control
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、テンパー圧延機、スキンパス圧延機、あるい
はテンションレベラー等の伸び加工を伴う工程での伸び
率の制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an elongation rate control device in a process involving elongation processing such as a temper rolling mill, a skin pass rolling mill, or a tension leveler.
鋼板等の引張り強度を確保するための一製造工程として
、焼鈍後の鋼板を、スキンパス圧延、テンパー圧延、あ
るいはテンションレベリングする工程がある。One manufacturing process for ensuring the tensile strength of steel plates and the like is a process of skin pass rolling, temper rolling, or tension leveling of the annealed steel plate.
この工程においては、その工程たとえば圧延機の入側と
出側との板厚の変化率すなわち伸び率を一定にすること
で品質の均一化を図っている。In this process, for example, the rate of change in plate thickness, that is, the elongation rate, between the entrance and exit sides of the rolling mill is kept constant to ensure uniform quality.
ところでこの伸び率は正確には、式
%式%)
)
で表されるが、便宜上、式
ε=(V−v’)/v ・・・ (1)(V;入側鋼
板速度、V;出側鋼板速度)として計算される。すなわ
ち、人出側での板速度を同時に計測し、その変化率より
、伸び率を演算する方式が採られるのが一般である。By the way, this elongation rate is accurately expressed by the formula % (%)), but for convenience, it is expressed by the formula ε = (V-v')/v (1) (V: entry side steel plate speed, V; It is calculated as the exit steel plate speed). In other words, it is common to simultaneously measure the board speed on the crowded side and calculate the elongation rate from the rate of change.
第5図は従来の伸び率制御装置の概要を示す模式図であ
る。図中、1は鋼板2を圧延する圧延機である。圧延機
lによる伸び率は、速度検出用タッチロール3.3およ
び速度センサ4.4によりそれぞれ測定される入側板速
度と出側板速度との差から、伸び率演算装置5によって
上記(1)式から演算される。FIG. 5 is a schematic diagram showing an outline of a conventional elongation rate control device. In the figure, 1 is a rolling mill that rolls a steel plate 2. The elongation rate by the rolling mill 1 is determined by the elongation calculation device 5 using the above formula (1) from the difference between the inlet plate speed and the outlet plate speed measured by the speed detection touch roll 3.3 and the speed sensor 4.4. Calculated from.
そしてこの伸び率の実績値を伸び羊膜定値と比較器6に
より比較し、伸び率の偏差を算出し、偏差信号を比例積
分(PI)制御装置7に入力し、比例および積分動作を
行わしめ、その結果を圧下制御装置8に入力し、その制
御信号を圧下調節機構9に入力し、圧下あるいは荷重を
制御するというループが形成されている。The actual value of the elongation rate is compared with the elongated amniotic membrane constant value by a comparator 6, the deviation of the elongation rate is calculated, and the deviation signal is input to the proportional integral (PI) control device 7 to perform proportional and integral operations. A loop is formed in which the result is input to the roll-down control device 8, the control signal is inputted to the roll-down adjustment mechanism 9, and the roll-down or load is controlled.
このループにより、伸び率が変化すれば、PI制御ルー
プにより圧下あるいは荷重が調節され、伸び率が設定伸
び率値に一致するように制御される。なお、テンション
レベラーの場合には、張力あるいは速度を修正する点を
除いて、基本的な構成は同等である。Through this loop, if the elongation rate changes, the reduction or load is adjusted by the PI control loop, and the elongation rate is controlled to match the set elongation rate value. In the case of a tension leveler, the basic configuration is the same except that the tension or speed is modified.
しかしながら、上記従来装置においては、次のような問
題がある。However, the conventional device described above has the following problems.
伸び率の制御は、同一の鋼種など特に大きな条件変化が
ないときまたは小さいときは問題ないが、例えばジング
ルスタンド圧延機の場合にはコイルの入れ替わりの機会
で、また連続ラインの場合は鋼板の溶接部の前後で、鋼
板の寸法(幅、厚み)あるいは鋼板特性(材質、焼鈍条
件等)が急速に変化する。この変化の度に圧下(荷重)
あるいは張力(速度)を修正することが必要となる。こ
の修正が後れると伸び率が許容範囲を外れてしまい、製
品の強度不良の原因となる。Controlling the elongation rate is not a problem when there are no large changes in conditions, such as when using the same steel type, or when the changes are small, but for example, in the case of a jingle stand rolling mill, there is an opportunity to change the coil, or in the case of a continuous line, it is necessary to control the elongation rate when welding steel plates. The dimensions of the steel plate (width, thickness) or the properties of the steel plate (material, annealing conditions, etc.) change rapidly before and after the process. At each time of this change, the pressure is reduced (load)
Alternatively, it may be necessary to modify the tension (speed). If this correction is delayed, the elongation rate will be out of the allowable range, causing poor strength of the product.
しかし、伸び率偏差に比例積分を施し、制御出力を出力
させる従来の制御方式では、制御の安定性を確保するた
めには制御出力が制限され、前述のような急速な伸び加
工条件に追従しきれない。However, in the conventional control method that applies proportional integration to the elongation rate deviation and outputs the control output, the control output is limited in order to ensure control stability, and it is difficult to follow the rapid elongation processing conditions described above. I can't do it.
また、PI制御の比例ゲイン、積分ゲインは、鋼板の特
性やその他の操業条件に応じて本来その適正値を変化さ
せるべき性質のものである。しかるに、鋼板の特性やそ
の他の操業条件に応じて常に適正なゲインを与えてこと
は比較的困難であるから、通常は低めのゲインを与えて
制御系が不安定になるのを防いでいる。このため、鋼板
の変わり目などの急速な加工条件変化があった時に伸び
率が大きく変化し、収束するのに時間を要する結果とな
っていた。収束時間が大きいと、応答遅れに伴うその間
の圧延材の強度が不良となり、その部分を切下げなけれ
ばならず、歩留り低下要因となっていた。In addition, the proportional gain and integral gain of PI control are such that their proper values should be changed depending on the characteristics of the steel plate and other operating conditions. However, since it is relatively difficult to always provide an appropriate gain depending on the characteristics of the steel sheet and other operating conditions, a low gain is usually provided to prevent the control system from becoming unstable. For this reason, when there is a rapid change in processing conditions, such as when the steel plate changes, the elongation rate changes significantly and it takes time to converge. If the convergence time is long, the strength of the rolled material during that time will be poor due to a response delay, and that portion will have to be cut down, which is a factor in reducing yield.
そこで本発明の主たる目的は、鋼板の変わり目等の大き
な状態変化があった場合に、応答遅れによる伸び率外れ
を短時間に解消し、伸び率の迅速な設定伸び率への収束
を図ることのできる伸び率制御装置を提供することにあ
る。Therefore, the main purpose of the present invention is to quickly eliminate deviations in the elongation rate due to response delays and to quickly converge the elongation rate to the set elongation rate when there is a major change in condition such as the change in steel plate. The purpose of this invention is to provide an elongation rate control device that can control the elongation rate.
上記課題を解決するための本発明は、伸び加工工程の入
側と出側との間で材料の伸び率を実測し、この実測伸び
率と予め設定された設定伸び率との偏差に基づいて、制
御対象にフィードバック制御をすることにより材料の伸
び率を一定に制御する装置において;
上記偏差が一定値を超えたことを検出する不感帯検出手
段と、前記偏差が一定値を超える条件の下で、伸び率偏
差に対するある制御出力の変化率をもって制御対象に与
え、かつ前記伸び率偏差が一定値範囲のとき制御出力を
保持させる調節手段とを備えたことで解決できる。In order to solve the above problems, the present invention measures the elongation rate of the material between the input side and the output side of the stretching process, and calculates the elongation rate based on the deviation between the measured elongation rate and the preset elongation rate. , in a device that controls the elongation rate of a material to be constant by performing feedback control on a controlled object; dead zone detection means for detecting that the deviation exceeds a certain value; and under a condition that the deviation exceeds a certain value; This problem can be solved by providing an adjusting means that applies a certain rate of change of the control output to the controlled object with respect to the elongation rate deviation and maintains the control output when the elongation rate deviation is within a constant value range.
一方、より好ましくは、伸び加工工程の入側と出側との
間で材料の実測した実測伸び率と予め設定された設定伸
び率との偏差に基づいて、比例積分方式によるフィード
バック制御をする比例積分制御装置と、上記偏差が比例
積分制御装置による制御では応答遅れを生じるほど大き
な偏差値を超えたこεを検出する不感帯検出手段と、前
記偏差が前記大きな偏差値を超える条件の下で、伸び率
偏差に対するある制御出力の変化率をもって制御対象に
与え、かつ前記伸び率偏差が一定値範囲のとき制御出力
を保持させる調節手段と、前記比例積分制御装置からの
出力と前記調節手段からの出力とを加算して制御対象に
与えて加算器とを備えたことで解決できる。On the other hand, more preferably, the proportional integral feedback control is performed based on the deviation between the actually measured elongation rate of the material and the preset set elongation rate between the input side and the output side of the stretching process. an integral control device; a dead zone detection means for detecting when the deviation exceeds a deviation value large enough to cause a response delay under control by the proportional-integral control device; an adjusting means for applying a change rate of a control output to a controlled object with respect to a rate deviation and holding the control output when the elongation rate deviation is within a constant value range; and an output from the proportional-integral control device and an output from the adjusting means. This can be solved by adding the above and applying it to the controlled object and providing an adder.
ここに、制御出力の変化率とは、制御出力たεえば圧下
率の経時的変化の割合(11111/秒)をいう。Here, the rate of change of the control output refers to the rate of change over time (11111/sec) of the control output, e.g., rolling reduction rate.
本発明では、従来の比例積分制御装置では、大きな加工
条件変化があったとき、応答遅れを生じることに鑑み、
前記偏差が一定値を超える条件の下で、伸び率偏差に対
する制御出力をある変化率をもって調節手段により制御
対象に与えてようにしている。したがって、かかる急速
調節のための補充調節系と、比例積分制御装置とを併用
する場合において、その比例積分制御による制御出力に
対して、前記調節手段による制御出力を加算することで
、制御速度を高めることができる。In the present invention, in consideration of the fact that conventional proportional-integral control devices cause a response delay when there is a large change in machining conditions,
Under the condition that the deviation exceeds a certain value, the control output for the elongation rate deviation is applied to the controlled object at a certain rate of change by the adjusting means. Therefore, when such a supplementary adjustment system for rapid adjustment and a proportional-integral control device are used together, the control speed can be adjusted by adding the control output by the adjustment means to the control output by the proportional-integral control. can be increased.
したがって、応答遅れを極力防止でき、材料の長手方向
の強度のの均一化を図ることができる。Therefore, response delay can be prevented as much as possible, and the strength of the material in the longitudinal direction can be made uniform.
以下図面により本発明をさらに具体的に説明する。 The present invention will be explained in more detail below with reference to the drawings.
第1図は、本発明にかかる制御装置を示すフローチャー
トであり、図中、従来装置(第5図参照)と異なる点は
、上記偏差が比例積分制御装置7による制御では応答遅
れを生じるほど大きな偏差値を超えたことを検出する不
感帯検出手段10と、前記偏差が前記大きな偏差値を超
える条件の下で、伸び率偏差に対する制御出力をある比
率をもって出力する調節手段11と、前記比例積分制御
装置7からの出力と前記調節手段11からの出力とを加
算して制御対象に与えて加算器12とが付加された点で
ある。FIG. 1 is a flowchart showing the control device according to the present invention. In the figure, the difference from the conventional device (see FIG. 5) is that the deviation is so large that control by the proportional-integral control device 7 causes a response delay. dead zone detection means 10 for detecting that the deviation value has been exceeded; adjustment means 11 for outputting a control output for the elongation rate deviation at a certain ratio under conditions in which the deviation exceeds the large deviation value; and the proportional-integral control. An adder 12 is added for adding the output from the device 7 and the output from the adjusting means 11 and applying the result to the controlled object.
すなわち、鋼板の変わり目などの大きな加工条件変化が
生じ、伸び率偏差が、第2図の(a)または(blのよ
うに、不感帯りを超える一定の値以上となると、不感帯
検出手段lOによりそのことを検出し、調節手段11に
より、一定の制御出力の変化率をもって((a)の場合
)あるいは伸び率偏差の大きさに応じて制御出力の変化
率を変化させながら((b)の場合)出力し、比例積分
制御装置7の出力と加算器12により加算して、圧下制
御装置8を介して、圧下調節機構9を動作させるように
したものである。なお、調節手段11では、伸び率偏差
が不感帯内に入った時点で制御出力をホールドさせる機
能を有している。In other words, when a large change in machining conditions occurs, such as at a change in the steel plate, and the elongation rate deviation exceeds a certain value exceeding the dead zone, as shown in (a) or (bl) in Fig. 2, the dead zone detection means 10 detects the Detecting this, the adjustment means 11 adjusts the control output at a constant rate of change (in case (a)) or while changing the rate of change in control output according to the size of the elongation rate deviation (in case (b)). ) is outputted and added by an adder 12 to the output of the proportional-integral control device 7, and the reduction adjustment mechanism 9 is operated via the reduction control device 8. It has a function to hold the control output when the rate deviation falls within the dead zone.
以上の一連の動作により、従来の比例積分制御のみの場
合に対して、応答遅れなしでより迅速な伸び率の収束を
図ることができる。Through the series of operations described above, it is possible to achieve faster convergence of the growth rate without response delay than in the case of conventional proportional-integral control only.
なお、鋼板の変わり目などの加工条件変化が少ないばあ
いには、不感帯検出手段10を動作させることなく、し
たがって調節手段11から出力をさせることなく、比例
積分制御装置7のみによる比例積分制御を行うこともで
きる。必要ならば、本発明において、比例積分制御装置
7を省略して、不感帯検出手段10と調節手段11との
みで制御することも可能である。この場合には、不感帯
りの幅を前記例より狭くするのがよい。Note that when there are few changes in processing conditions, such as when the steel plate changes, proportional-integral control is performed only by the proportional-integral control device 7 without operating the dead zone detection means 10, and therefore without causing an output from the adjusting means 11. You can also do that. If necessary, in the present invention, it is also possible to omit the proportional-integral control device 7 and perform control using only the dead zone detection means 10 and the adjustment means 11. In this case, it is preferable to make the width of the dead zone narrower than in the above example.
かかる装置において、調節手段11からの出力に際して
、伸び率偏差の大きさに応じて、第2図+b)のように
変化率を可変とすることもできる。これによって、偏差
が大のときは変化率をより大きくして収束を速め、偏差
が小のときは変化率をより小さくして、オーバーシュー
トを減らすことができる。また、変化率および不感帯の
幅については、鋼種やライン速度などによって適切に設
定することができる。In such an apparatus, the rate of change in the output from the adjusting means 11 can be made variable depending on the magnitude of the elongation rate deviation, as shown in FIG. 2+b). As a result, when the deviation is large, the rate of change can be made larger to speed up convergence, and when the deviation is small, the rate of change can be made smaller to reduce overshoot. Further, the rate of change and the width of the dead zone can be appropriately set depending on the steel type, line speed, etc.
たとえば、変化率の設定については、制御の安定性の考
慮より、圧下装置の昇降速度限界、あるいは圧延の安定
度、すなわちロール直下での材料の絞り込みに対する影
響を考慮した昇降速度限界より決定することができる。For example, the rate of change should be determined based on the lifting speed limit of the rolling device, or the lifting speed limit that takes into account the effect on rolling stability, that is, squeezing the material directly under the rolls, rather than considering control stability. I can do it.
不感帯については、上記変化率の条件下で、伸び率偏差
の不感帯内に到達し、制御オフとなってからの惰性によ
る圧下の変化および伸び率の変化により、制御偏差の極
性の反転、すなわち行き過ぎ(オーバーシュート)が生
じないように選ぶことが重要である。したがって、適正
な不感帯幅設定値は変化率の大きさおよび圧下制御系の
応答に関連して決定するのがよい。Regarding the dead zone, under the conditions of the above rate of change, the polarity of the control deviation is reversed, due to changes in the reduction due to inertia and changes in the elongation rate after the elongation rate deviation reaches the dead zone and the control is turned off. It is important to select such that no overshoot (overshoot) occurs. Therefore, an appropriate dead band width setting value is preferably determined in relation to the magnitude of the rate of change and the response of the reduction control system.
また上記のように、変化率の大きさを伸び率偏差に応じ
て変える場合についても、偏差が大のときほど、変化重
大となるように設定し、不感帯内を検出して制御オフし
たときの行き過ぎが生じないように調節すればよい。こ
の場合の方が不感帯幅を小さくできる利点がある。Also, as mentioned above, when changing the magnitude of the rate of change according to the elongation rate deviation, the larger the deviation, the more serious the change, and when the dead band is detected and the control is turned off, Just adjust it so that it doesn't go too far. This case has the advantage that the dead zone width can be made smaller.
次に実施例により本発明の効果を明らかにする。 Next, the effects of the present invention will be clarified through examples.
本実施例では、焼鈍条件等は従来技術と同一とし、鋼材
の厚みを0.6mmから0.5mmに変化させた場合に
つき、本発明装置と従来装置とで圧延をおこなった結果
を第3図および第4図に示す。すなわち、第3図(al
、(b)、telは従来装置による場合を示し、第4図
(a)、(bl、telは本発明装置による場合をそれ
ぞれ示している。In this example, the annealing conditions, etc. are the same as those of the prior art, and the thickness of the steel material is changed from 0.6 mm to 0.5 mm. Figure 3 shows the results of rolling performed using the device of the present invention and the conventional device. and shown in FIG. That is, Fig. 3 (al
, (b) and tel indicate the case using the conventional device, and FIG.
まず第3図telのよ・うに、従来は鋼材厚みが0.6
から0.5則に代わっても、比例積分制御装置のみによ
り制御しているので、同図TblのようにPI制御量(
荷重値)の変化は極めてなだらかとなり、このため同図
(a)に見られるように、伸び率が設定伸び率に収束す
るまでに20秒もかかってしまった。First of all, as shown in Figure 3, the thickness of the steel material used to be 0.6.
Even if the 0.5 rule is changed from
The change in the load value (load value) was extremely gradual, and as a result, as shown in FIG.
他方、本発明によれば、不感帯検出手段および調節手段
により大きな伸び率偏差に対して、加算した調節補正量
を制御対象に与えてので、第4図(alのように、伸び
率が設定伸び率に達するまでの収束時間がきわめて短い
(4秒)ものとなった。On the other hand, according to the present invention, the added adjustment correction amount is given to the controlled object in response to a large elongation rate deviation by the dead zone detection means and the adjustment means, so that the elongation rate is adjusted to the set elongation as shown in FIG. 4 (al). The convergence time to reach the desired rate was extremely short (4 seconds).
以上の通り、本発明によれば、鋼板の変わり目等の大き
な状態変化があった場合に、応答遅れによる伸び率外れ
を短時間に解消し、伸び率の設定伸び率への迅速な収束
を図ることのできる。As described above, according to the present invention, when there is a large state change such as a change in the steel plate, deviations in the elongation rate due to response delay can be resolved in a short time, and the elongation rate can quickly converge to the set elongation rate. I can do it.
第1図は、本発明装置の基本構成を示すフローチャート
、第2図(al、(b)はそれぞれ比例積分制御装置お
よび調節手段による伸び率偏差〜制御出力相関図、第3
図(a)〜fclは従来装置による制御態様および結果
を示すグラフ、第4図(a)から(C)は本発明装置に
よる制御態様および結果を示すグラフ、第5図は従来装
置の基本構成を示すフローチャートである。
1・・・圧延機、2・・・鋼材、3・・・速度検出ロー
ル、4・・・速度センサー 5・・・伸び率計測装置、
7・・・比例積分制御装置、8・・・圧下制御装置、9
・・・圧下調節機構、10・・・不感帯検出器、10・
・・調節手段。
第1図
第2図
(α)
(b)
第
3
図
(α)
(b)
fc)
(′l!、禾)
第
図
尭速頷欝
捕ヱ(
ム
(C1
(本待fA)FIG. 1 is a flowchart showing the basic configuration of the device of the present invention, FIGS. 2(a) and 2(b) are correlation diagrams of elongation rate deviation and control output due to the proportional-integral control device and the adjusting means, respectively, and FIG.
Figures (a) to fcl are graphs showing control modes and results by the conventional device, Figures 4 (a) to (C) are graphs showing control modes and results by the device of the present invention, and Figure 5 is the basic configuration of the conventional device. It is a flowchart which shows. DESCRIPTION OF SYMBOLS 1... Rolling machine, 2... Steel material, 3... Speed detection roll, 4... Speed sensor 5... Elongation rate measuring device,
7... Proportional-integral control device, 8... Drop-down control device, 9
... Pressure adjustment mechanism, 10... Dead zone detector, 10.
...Adjustment means. Fig. 1 Fig. 2 (α) (b) Fig. 3 (α) (b) fc) ('l!, 禾) Fig.
Claims (2)
を実測し、この実測伸び率と予め設定された設定伸び率
との偏差に基づいて、制御対象にフィードバック制御を
することにより材料の伸び率を一定に制御する装置にお
いて; 上記偏差が一定値を超えたことを検出する不感帯検出手
段と、前記偏差が一定値を超える条件の下で、伸び率偏
差に対するある制御出力の変化率をもって制御対象に与
え、かつ前記伸び率偏差が一定値範囲のとき制御出力を
保持させる調節手段とを備えたことを特徴とする伸び率
制御装置。(1) Measure the elongation rate of the material between the input and exit sides of the elongation process, and perform feedback control on the control target based on the deviation between the measured elongation rate and the preset elongation rate. In a device for controlling the elongation rate of a material to a constant value by: a dead zone detection means for detecting that the deviation exceeds a certain value; and a certain control output for the elongation rate deviation under the condition that the deviation exceeds a certain value. an elongation rate control device, characterized in that it is provided with an adjusting means for applying a change rate of .
た実測伸び率と予め設定された設定伸び率との偏差に基
づいて、比例積分方式によるフィードバック制御をする
比例積分制御装置と、上記偏差が比例積分制御装置によ
る制御では応答遅れを生じるほど大きな偏差値を超えた
ことを検出する不感帯検出手段と、前記偏差が前記大き
な偏差値を超える条件の下で、伸び率偏差に対するある
制御出力の変化率をもって制御対象に与え、かつ前記伸
び率偏差が一定値範囲のとき制御出力を保持させる調節
手段と、前記比例積分制御装置からの出力と前記調節手
段からの出力とを加算して制御対象に与えて加算器とを
備えたことを特徴とする伸び率制御装置。(2) A proportional-integral control device that performs feedback control using a proportional-integral method based on the deviation between the actually measured elongation rate of the material and the preset elongation rate between the input side and the output side of the elongation process. and dead zone detection means for detecting that the deviation exceeds a deviation value large enough to cause a response delay under control by a proportional-integral control device; an adjusting means that applies a certain rate of change of control output to the controlled object and maintains the control output when the elongation rate deviation is within a constant value range; and adding the output from the proportional-integral control device and the output from the adjusting means. 1. An elongation rate control device comprising: an adder in which the elongation rate is applied to a controlled object;
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1202106A JPH0642962B2 (en) | 1989-08-03 | 1989-08-03 | Elongation control device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1202106A JPH0642962B2 (en) | 1989-08-03 | 1989-08-03 | Elongation control device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0366407A true JPH0366407A (en) | 1991-03-22 |
JPH0642962B2 JPH0642962B2 (en) | 1994-06-08 |
Family
ID=16452064
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1202106A Expired - Fee Related JPH0642962B2 (en) | 1989-08-03 | 1989-08-03 | Elongation control device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0642962B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017131921A (en) * | 2016-01-27 | 2017-08-03 | Jfeスチール株式会社 | Controller of temper rolling mill and control method of the same |
-
1989
- 1989-08-03 JP JP1202106A patent/JPH0642962B2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017131921A (en) * | 2016-01-27 | 2017-08-03 | Jfeスチール株式会社 | Controller of temper rolling mill and control method of the same |
Also Published As
Publication number | Publication date |
---|---|
JPH0642962B2 (en) | 1994-06-08 |
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