CN116099880A - Thickness AGC control method based on tension deviation detection and related equipment - Google Patents
Thickness AGC control method based on tension deviation detection and related equipment Download PDFInfo
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- CN116099880A CN116099880A CN202310077113.0A CN202310077113A CN116099880A CN 116099880 A CN116099880 A CN 116099880A CN 202310077113 A CN202310077113 A CN 202310077113A CN 116099880 A CN116099880 A CN 116099880A
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- 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
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
- B21B37/18—Automatic gauge control
- B21B37/20—Automatic gauge control in tandem mills
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/06—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring tension or compression
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Abstract
The invention provides a thickness AGC control method based on tension deviation detection and related equipment. The method comprises the following steps: real-time measurement of the actual tension T act The method comprises the steps of carrying out a first treatment on the surface of the Acquiring a tension set value signal T of a plate belt ref A thickness signal, a width signal to pass through the tension set point signal T ref Thickness signal, width signal and actual tension T act Calculating a unit tension deviation delta T; calculating a change rate of the unit tension deviation based on the unit tension deviation Δt; based on the rate of change of the unit tension deviation, the roll gap adjustment amount Δs is obtained. Therefore, the thickness control method based on tension deviation is established, and the thickness control method has good timeliness for thickness control on the thickness fluctuation of the raw materials, such as the tin-plated chilled base plate or the high-strength steel chilled base plate, which is caused by the factors of performance fluctuation and the like, and has the effects of stabilizing the thickness of the through coil and reducing the number of waste and defective products with the thickness exceeding the standard.
Description
Technical Field
The present invention relates to the technical field of metallurgical thickness control, and more particularly, to a thickness AGC control method based on tension deviation detection, a thickness AGC control device based on tension deviation detection, an electronic device, and a storage medium.
Background
At present, AGC (Auto Gauge Control) is a key technology for realizing the thickness stable control of a cold continuous rolling mill, and the principle is that a thickness gauge, a velometer, a pressure head and other equipment are utilized to continuously measure and calculate the metal second flow of a plate strip, and a deviation signal is utilized to adjust the roll gap and the speed of the rolling mill, but for the thickness fluctuation of high amplitude and high frequency caused by factors such as performance fluctuation of the head and the tail of a raw material such as a tinned chilled substrate or a high-strength steel chilled substrate, the conventional AGC model cannot realize the rapid and effective control of the thickness of the cold continuous rolling mill due to the time lag of the thickness measurement or the program operation and the common adoption of an integral control algorithm, so that the conditions of unstable rolling thickness and increased number of waste and defective products with exceeding thickness are easily generated.
Therefore, a new solution is needed to solve the above technical problems.
Disclosure of Invention
In the summary, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description. The summary of the invention is not intended to define the key features and essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
In a first aspect, the present invention provides a thickness AGC control method based on tension deviation detection, including:
real-time measurement of the actual tension T act ；
Acquiring a tension set value signal T of a plate belt ref A thickness signal, a width signal to pass through the tension set point signal T ref Thickness signal, width signal and actual tension T act Calculating a unit tension deviation delta T;
calculating a change rate of the unit tension deviation based on the unit tension deviation Δt;
based on the rate of change of the unit tension deviation, the roll gap adjustment amount Δs is obtained.
Alternatively, the method described above, via the tension set point signal T ref Thickness signal, width information and actual tension T act Calculating the unit tension deviation Δt may include:
the unit tension deviation Δt is calculated by the following formula:
ΔT＝(T ref -T act ) And/h×w, wherein h represents a thickness signal and w represents a width signal.
Alternatively, the method, based on the unit tension deviation Δt, calculates a rate of change of the unit tension deviation, may include:
storing the deltat to a temporary register to calculate a deviation signal deltat' according to a proportional-integral control algorithm;
the unit tension deviation deltat is differenced from the deviation signal deltat' to obtain the rate of change of the unit tension deviation.
Optionally, the method, based on the change rate of the unit tension deviation, of obtaining the roll gap adjustment Δs may include:
the roll gap adjustment Δs is calculated according to the following formula: Δs= (Δt- Δt')×k p +∫(ΔT-ΔT')×K i Wherein K is p Is a proportional control coefficient, K i Is an integral control coefficient.
Optionally, the method further comprises:
and performing open-loop control on the roll gap adjustment.
Optionally, the method for performing open loop control on the roll gap adjustment amount may include:
setting saturated output limiting limit of the roll gap adjusting quantity according to the roll gap adjusting quantity;
and carrying out open loop control on the saturated roll gap adjustment quantity based on saturated output amplitude limiting.
Optionally, the method, based on the saturated output limiting, of performing open loop control on the saturated roll gap adjustment, may include:
and monitoring the roll gap adjustment quantity delta S in real time, and adjusting the roll gap adjustment quantity delta S obtained by monitoring to be saturated output amplitude limiting when the roll gap adjustment quantity delta S obtained by monitoring is larger than or smaller than the saturated output amplitude limiting.
In a second aspect, a thickness AGC control device based on tension deviation detection is also provided, including:
the measuring module is used for measuring the actual tension T in real time act ；
A first calculation module for obtaining a tension set value signal T of the plate belt ref A thickness signal, a width signal to pass through the tension set point signal T ref Thickness signal, width signal and actual tension T act Calculating a unit tension deviation delta T;
the second calculation module is used for calculating the change rate of the unit tension deviation based on the unit tension deviation delta T;
and the acquisition module is used for acquiring the roll gap adjustment quantity delta S based on the change rate of the unit tension deviation.
In a third aspect, an electronic device is also presented, comprising a processor and a memory, wherein the memory has stored therein computer program instructions which, when executed by the processor, are adapted to perform the above method of controlling thickness AGC based on tension bias detection.
In a fourth aspect, a storage medium is also provided, on which program instructions are stored, which program instructions are operative to perform the thickness AGC control method based on tension bias detection as described above.
According to the technical scheme, the actual tension T is measured in real time act The method comprises the steps of carrying out a first treatment on the surface of the Acquiring a tension set value signal T of a plate belt ref A thickness signal, a width signal to pass through the tension set point signal T ref Thickness signal, width signal and actual tension T act Calculating a unit tension deviation delta T; calculating a change rate of the unit tension deviation based on the unit tension deviation Δt; based on the rate of change of the unit tension deviation, the roll gap adjustment amount Δs is obtained. Therefore, a thickness control method based on tension deviation is established, high-amplitude and high-frequency thickness fluctuation is controlled in a targeted manner, unit tension deviation is calculated according to information of plate belt scanning based on detection of real-time tension, the change rate of the unit tension deviation is calculated, and then the roll gap adjustment quantity is adjusted, so that the head and tail thickness control of a tinned chilled substrate and a high-strength steel chilled substrate is improved, the effects of stable rolling thickness and reduction of the number of waste and defective products with exceeding thickness are achieved.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
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Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the specification. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
fig. 1 shows a schematic flow chart of a thickness AGC control method based on tension bias detection according to one embodiment of the invention;
FIG. 2 shows a schematic program diagram of a proportional-integral control algorithm calculating a bias signal according to one embodiment of the invention;
FIG. 3 shows a schematic program diagram for combining the proportional and integral algorithms and setting the roll gap saturation output limit in accordance with one embodiment of the present invention;
fig. 4 is a schematic block diagram of a thickness AGC control device based on tension bias detection according to an embodiment of the present invention;
fig. 5 shows a schematic block diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The terms "first," "second," "third," "fourth" and the like in the description and in the claims of this application and in the above-described figures, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments described herein may be implemented in other sequences than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application.
According to a first aspect of the present invention, a thickness AGC control method based on tension bias detection is provided. Fig. 1 shows a schematic flow chart of a thickness AGC control method based on tension bias detection according to one embodiment of the invention. As shown in fig. 1, the method includes:
s110, measuring the actual tension T in real time act 。
It should be noted that, based on the tensiometer installed in front of the frame, the actual tension T is measured in real time act Is a numerical value of (2). It can be understood that the tension is a bridge and a tie which are connected with parameters of each frame, the tension control system is a variable parameter system under the requirement of high real-time performance, the tension is also an important phenomenon in the continuous rolling process, and eachThe frames are connected with each other by transferring energy under the influence of the tension of the strip steel. Tension is generated due to speed mismatch between frames. For example, when the two frames change due to external disturbance or adjustment, the outlet speed of the strip steel of the rolling mill A is reduced, specifically, the speed can be reduced by reducing the roller speed, or reducing the forward slip caused by changing other process parameters such as the rolling reduction rate or increasing the inlet speed of the strip steel of the rolling mill B, or alternatively, the reason can be that the roller speed is increased or the backward slip is reduced, and as a result, the strip steel between the frames A-B is pulled, so that tension is generated. The control of tension is an important problem in continuous rolling, high-value tension rolling is an important characteristic of strip steel cold continuous rolling production, a reasonable tension system can ensure that the rolling process is stable, and the control of the quality of finished strip steel and the quality of a strip coil is important, so the method is based on tension deviation detection, and in the actual metal rolling process, when a thickness abrupt change point enters a roll gap, the tension in front of a frame correspondingly generates larger tension abrupt change due to second flow abrupt change, and the tension is synchronous with the position of the thickness difference and has no position hysteresis problem.
S120, obtaining a tension set value signal T of the plate belt ref A thickness signal, a width signal to pass through the tension set point signal T ref Thickness signal, width signal and actual tension T act The unit tension deviation deltat is calculated.
The tension set point signal, thickness signal and width signal of the scanned plate band are obtained to determine the tension set point, thickness and width of the plate band. The principle of tension setting is based on the 'plate type priority', the set value of the tension is important, and when the rolling tension is determined, the front tension is generally larger than the rear tension, so that the stability of the rolling process is facilitated. If the thickness of the strip reaches 1/100 of the roll diameter or less, the back tension can be made equal to or greater than the front tension to facilitate deformation and thickness control of the steel strip. Conventionally, when rolling is performed in the first pass, since the coiling tension of the pickling line is small, the post-tension of the first pass is small and is smaller than the coiling tension of the pickling line in order to avoid scratching the surface due to the dislocation between the steel strip layers. To increase the post-roll tension of the first pass, the twenty-roll mill is provided with a platen on the entry side to increase the post-roll tension. The pass tension should also be adjusted at any time according to the plate shape, especially when the rolled strip is thin. When waves exist in the middle of the material, tension is reduced to prevent the belt edge from being broken or broken; the tension can be increased appropriately when the strip is subject to edge waves.
S130, calculating the change rate of the unit tension deviation based on the unit tension deviation delta T.
It will be appreciated that the actual tension T act The unit tension deviation deltat is constantly changing, so the unit tension deviation deltat is also accompanied by the change, and the change rate of the unit tension deviation deltat in the period is calculated according to the interval duration of each scanning of the plate belt.
And S140, acquiring the roll gap adjustment quantity delta S based on the change rate of the unit tension deviation.
It can be understood that the adjustment amount Δs required for the roll gap of the rolling mill is calculated according to the change rate of the unit tension deviation calculated in step S130 by using the PI proportional integral control algorithm.
According to the technical scheme, the actual tension T is measured in real time act The method comprises the steps of carrying out a first treatment on the surface of the Acquiring a tension set value signal T of a plate belt ref A thickness signal, a width signal to pass through the tension set point signal T ref Thickness signal, width signal and actual tension T act Calculating a unit tension deviation delta T; calculating a change rate of the unit tension deviation based on the unit tension deviation Δt; based on the rate of change of the unit tension deviation, the roll gap adjustment amount Δs is obtained. Therefore, the thickness control method based on tension deviation is established, and the thickness control method has good timeliness for thickness control on the thickness fluctuation of the raw materials, such as the tin-plated chilled base plate or the high-strength steel chilled base plate, which is caused by the factors of performance fluctuation and the like, and has the effects of stabilizing the thickness of the through coil and reducing the number of waste and defective products with the thickness exceeding the standard.
In some embodiments, the step S120 is performed by the tension set point signal T ref Thickness signal, width information and actual tension T act Calculating unit tension deviation delta T, and can be includedThe method comprises the following steps:
s121, calculating the unit tension deviation delta T according to the following formula:
ΔT＝(T ref -T act ) And/h×w, wherein h represents a thickness signal and w represents a width signal.
It can be understood that, according to the tension set value signal, the thickness signal and the width signal fed back by the plate belt are scanned in step S120, the product of the value of the fed back thickness signal and the value of the width signal is taken as a divisor, the difference between the value of the tension set value signal and the actual tension value of the plate belt is taken as a dividend, the calculated quotient value is the unit tension deviation, and the unit tension deviation Δt can be intuitively and efficiently calculated according to the above formula.
In some embodiments, the step S130 calculates the rate of change of the unit tension deviation based on the unit tension deviation Δt, and may include:
s131, storing the delta T into a temporary register to calculate a deviation signal delta T' according to a proportional-integral control algorithm.
Specifically, FIG. 2 shows a schematic program diagram of a proportional-integral control algorithm calculating a bias signal according to one embodiment of the invention. As shown in fig. 2, in which DEV OF T45 is Δt, DEV OF T45 is stored in a temporary register, LAST TIME VALUE, which is the VALUE OF the unit tension deviation Δt at the previous TIME, is calculated to obtain a TIME period tension deviation DELTA DEVT45, and a deviation signal Δt' is calculated by a proportional coefficient KPG and an integral coefficient KIG.
S132, the unit tension deviation delta T is differenced with the deviation signal delta T' to obtain the change rate of the unit tension deviation.
It can be understood that, according to step S131, the tension deviation signal Δt 'of the previous time scanning plate belt is obtained, the unit tension deviation Δt is differentiated from the value of the tension deviation Δt' of the previous time scanning plate belt, and the change rate of the unit tension deviation is calculated.
In some embodiments, the step S140 may obtain the roll gap adjustment Δs based on the rate of change of the unit tension deviation, which may include:
s141, calculating the roll gap adjustment according to the following formulaQuantity Δs: Δs= (Δt- Δt')×k p +∫(ΔT-ΔT')×K i Wherein K is p Is a proportional control coefficient, K i Is an integral control coefficient.
The ratio control K p The output of the controller is proportional to the input error signal, and the system output has steady state error when only proportional control is present. The proportional adjustment is to react to the deviation of the system in proportion, and as soon as the deviation occurs in the system, the proportional adjustment produces an adjustment to reduce the deviation. The proportion has a larger effect, can speed up the adjustment and reduce the error. Integral control K i In integral control, the output of the controller is proportional to the integral of the input error signal, and for an automatically controlled system, if a steady state error exists after steady state is entered, an "integral term" must be introduced into the controller in order to eliminate the steady state error. The error of the integral term depends on the integral over time, and as time increases, the integral term increases. The integral term still increases with time with relatively small errors, which push the output of the controller to increase to further reduce the steady state error until it is equal to zero. Therefore, the proportional Plus Integral (PI) controller can make the system have no steady state error after entering steady state. It will be appreciated that the integral adjustment acts to enable the system to eliminate steady state errors and improve the no-difference. Because of the error, the integral adjustment is performed until no difference exists, the integral adjustment is stopped, and the integral adjustment outputs a constant value. The magnitude of the integration depends on the integration time constant Ti, and the smaller Ti, the stronger the integration. On the contrary, ti is large and the integration effect is weak. Adding integral adjustments can degrade system stability and slow dynamic response. The integration is often combined with two other regulation laws to form a PI regulator.
In some embodiments, the method may further include step S150, performing open loop control on the roll gap adjustment.
It is understood that open loop control refers to the output of the controlled object, i.e. the controlled quantity, without affecting the output of the controller. In such a control system, the controlled quantity is not relied upon to be returned to form any closed loop. The step carries out open-loop control on the roll gap adjustment quantity so as to carry out saturation design on the roll gap in the follow-up process.
In some embodiments, the step S150 of performing open loop control on the roll gap adjustment may include:
s151, setting saturated output limiting limit of the roll gap adjusting quantity according to the roll gap adjusting quantity.
It will be appreciated that in order to obtain a high quality rolled strip, the roll gap of the rolls must be adjusted at any time to suit the crown of the raw material and to compensate for the effect of various factors on the roll gap. The roll can produce the ideal target roll gap only with one optimal convexity for strips with different widths, thicknesses and alloys. Therefore, the essence of the roll gap control is to control the bearing roll gap, and the roll gap control is required to control the shape of the full roll gap in the width span of the rolled piece, unlike the thickness control which only needs to control the opening precision at the midpoint of the roll gap. Therefore, if the roll gap adjustment quantity is not provided with saturated output amplitude limiting, the roll gap adjustment quantity can be subjected to overshoot, and in order to prevent the roll gap control overshoot, a roll gap control saturation design is added in the model design. Specifically, fig. 3 is a schematic program diagram of combining the proportional and integral algorithms and setting the roll gap saturation output limit. As shown in fig. 3, intelgaral is a value calculated by an integration algorithm, porprotion is a value calculated by a proportional-INTEGRAL algorithm, both are combined, a roll gap saturated output LIMIT is set, UPPER LIMIT G is an UPPER LIMIT output LIMIT, and LOWER LIMIT G is a LOWER LIMIT output LIMIT.
S152, performing open-loop control on the saturated roll gap adjustment amount based on saturated output amplitude limiting.
It should be noted that, based on the saturated output clipping set in step S151, the saturated roll gap adjustment amount is controlled in an open loop, and the saturated output clipping may be adjusted or set within the saturated output clipping, which is illustrated in fig. 3, and in the embodiment illustrated in fig. 3, the saturated output clipping is 300um and-300 um, that is, 3000 illustrated in fig. 3. It will be appreciated that corresponding control of the saturation gap adjustment amount may be performed based on the set saturation output limit. Any existing or future control method that can perform open loop control on the saturated roll gap adjustment is within the scope of protection of the present application, and no specific control method is limited herein.
In a specific embodiment, the step S152 of performing open loop control on the saturation roll gap adjustment amount based on the saturation output clipping may include:
and S152A, monitoring the roll gap adjustment quantity delta S in real time, and adjusting the roll gap adjustment quantity delta S obtained by monitoring to be saturated output amplitude limiting when the roll gap adjustment quantity delta S obtained by monitoring is larger or smaller than the saturated output amplitude limiting.
Referring again to fig. 3, in the embodiment shown in fig. 3, the saturated output clipping is set to 300um or-300 un. Therefore, in the actual monitoring process, if the roll gap adjustment amount Δs is greater than 300um or less than-300 um, the roll gap adjustment amount Δs stops unidirectional variation. According to the roll gap adjustment quantity delta S calculated in the step S140, if the delta S is larger than 300um, controlling the roll gap adjustment quantity delta S to be 300um; if the roll gap adjustment quantity delta S is smaller than-300 um, the roll gap adjustment quantity delta S is controlled to be-300 um, so that the roll gap control overshoot is prevented, and the rolling stability is protected.
According to a second aspect of the present invention, there is also provided a thickness AGC control device based on tension bias detection. Fig. 4 shows a schematic block diagram of a thickness AGC control device 400 based on tension bias detection in accordance with one embodiment of the present invention. As shown in fig. 4, the apparatus may include:
a measuring module 410 for measuring the actual tension T in real time act ；
A first calculation module 420 for obtaining a tension set point signal T of the plate belt ref A thickness signal, a width signal to pass through the tension set point signal T ref Thickness signal, width signal and actual tension T act Calculating a unit tension deviation delta T;
a second calculation module 430 for calculating a rate of change of the unit tension deviation based on the unit tension deviation Δt;
the obtaining module 440 is configured to obtain the roll gap adjustment Δs based on the rate of change of the unit tension deviation.
According to a third aspect of the present invention, an electronic device is further provided, and fig. 5 shows a schematic block diagram of an electronic device provided by an embodiment of the present invention. As shown in fig. 5, the device includes at least one processor 510, at least one memory 520 connected to the processor 510, a bus 530; wherein, the processor 510 and the memory 520 complete the communication with each other through the bus 530; processor 510 is operative to invoke program instructions in memory 520 to perform the thickness AGC control method based on tension bias detection described above.
The device herein may be a server, PC, PAD, cell phone, etc.
The present application also provides a computer program product adapted to perform, when executed on a data processing device, a program initialized with the method steps of:
real-time measurement of the actual tension T act ；
Acquiring a tension set value signal T of a plate belt ref A thickness signal, a width signal to pass through the tension set point signal T ref Thickness signal, width signal and actual tension T act Calculating a unit tension deviation delta T;
calculating a change rate of the unit tension deviation based on the unit tension deviation Δt;
based on the rate of change of the unit tension deviation, the roll gap adjustment amount Δs is obtained.
Further, the method is implemented by a tension set point signal T ref Thickness signal, width signal and actual tension T act Calculating the unit tension deviation Δt may include:
the unit tension deviation Δt is calculated by the following formula:
ΔT＝(T ref -T act ) And/h×w, wherein h represents a thickness signal and w represents a width signal.
Further, the method, based on the unit tension deviation Δt, may calculate a rate of change of the unit tension deviation, which may include:
storing the deltat to a temporary register to calculate a deviation signal deltat' according to a proportional-integral control algorithm;
the unit tension deviation deltat is differenced from the deviation signal deltat' to obtain the rate of change of the unit tension deviation.
Further, the method, based on the change rate of the unit tension deviation, may include:
the roll gap adjustment Δs is calculated according to the following formula: Δs= (Δt- Δt')×k p +∫(ΔT-ΔT')×K i Where Kp is a proportional control coefficient and Ki is an integral control coefficient.
Further, the method further comprises the following steps:
and performing open-loop control on the roll gap adjustment.
Further, the method for performing open loop control on the roll gap adjustment amount may include:
setting saturated output limiting limit of the roll gap adjusting quantity according to the roll gap adjusting quantity;
and carrying out open loop control on the saturated roll gap adjustment quantity based on saturated output amplitude limiting.
Further, the method for performing open loop control on the saturated roll gap adjustment amount based on saturated output amplitude limiting may include:
and monitoring the roll gap adjustment quantity delta S in real time, and adjusting the roll gap adjustment quantity delta S obtained by monitoring to be saturated output amplitude limiting when the roll gap adjustment quantity delta S obtained by monitoring is larger than or smaller than the saturated output amplitude limiting.
In a fourth aspect, a storage medium is also provided, on which program instructions are stored, which program instructions are operative to perform the thickness AGC control method based on tension bias detection as described above. The storage medium may include, for example, a storage component of a tablet computer, a hard disk of a computer, read-only memory (ROM), erasable programmable read-only memory (EPROM), portable compact disc read-only memory (CD-ROM), USB memory, or any combination of the foregoing storage media. The computer-readable storage medium may be any combination of one or more computer-readable storage media.
Those skilled in the art will understand the specific details and advantages of the thickness AGC control device, the electronic device and the storage medium based on the tension deviation detection and the details of the thickness AGC control method based on the tension deviation detection by reading the above description about the thickness AGC control method based on the tension deviation detection, and are not repeated herein for brevity.
In several embodiments provided herein, it should be understood that the disclosed apparatus and/or device may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of elements is merely a logical functional division, and there may be additional divisions of actual implementation, e.g., multiple elements or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods of the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (10)
1. The thickness AGC control method based on tension deviation detection is characterized by comprising the following steps:
real-time measurement of the actual tension T act ；
Acquiring a tension set value signal T of a plate belt ref A thickness signal, a width signal to pass through the tension set point signal T ref The thickness signal, the width signal and the actual tension T act Calculating a unit tension deviation delta T;
calculating a rate of change of the unit tension deviation based on the unit tension deviation Δt;
and acquiring the roll gap adjustment quantity delta S based on the change rate of the unit tension deviation.
2. A thickness AGC control method based on tension bias detection according to claim 1, wherein said passing said tension set point signal T ref The thickness signal, the width information and the actual tension T act Calculating a unit tension deviation Δt, comprising:
the unit tension deviation deltat is calculated by the following formula:
ΔT＝(T ref -T act ) And/h×w, wherein h represents the thickness signal and w represents the width signal.
3. The method for controlling thickness AGC based on tension bias detection according to claim 1, wherein the calculating a rate of change of the unit tension bias based on the unit tension bias Δt comprises:
storing the delta T to a temporary register to calculate a deviation signal delta T' according to a proportional-integral control algorithm;
and differencing the unit tension deviation delta T and the deviation signal delta T' to obtain the change rate of the unit tension deviation.
4. The method for controlling thickness AGC based on tension bias detection according to claim 3, wherein the obtaining a roll gap adjustment amount Δs based on the rate of change of the unit tension bias comprises:
the roll gap adjustment Δs is calculated according to the following formula: Δs= (Δt- Δt')×k p +∫(ΔT-ΔT')×K i Wherein K is p Is a proportional control coefficient, K i Is an integral control coefficient.
5. The method for controlling thickness AGC based on tension bias detection of claim 1, further comprising:
and performing open-loop control on the roll gap adjustment quantity.
6. The method for controlling thickness AGC based on tension bias detection according to claim 5, wherein the open loop control of the roll gap adjustment amount comprises:
setting saturated output limiting of the roll gap adjusting quantity aiming at the roll gap adjusting quantity;
and carrying out open loop control on the saturated roll gap adjustment quantity based on the saturated output amplitude limiting.
7. The method for controlling thickness AGC based on tension bias detection according to claim 6, wherein the open loop control of the saturation roll gap adjustment based on the saturation output clipping comprises:
and monitoring the roll gap adjustment quantity delta S in real time, and adjusting the roll gap adjustment quantity delta S obtained by monitoring to be the saturated output amplitude limitation when the roll gap adjustment quantity delta S obtained by monitoring is larger or smaller than the saturated output amplitude limitation.
8. A thickness AGC control device based on tension bias detection, comprising:
the measuring module is used for measuring the actual tension T in real time act ；
A first calculation module for obtaining a tension set value signal T of the plate belt ref A thickness signal, a width signal to pass through the tension set point signal T ref The thickness signal, the width signal and the actual tension T act Calculating a unit tension deviation delta T;
a second calculation module for calculating a rate of change of the unit tension deviation based on the unit tension deviation Δt;
and the acquisition module is used for acquiring the roll gap adjustment quantity delta S based on the change rate of the unit tension deviation.
9. An electronic device comprising a processor and a memory, wherein the memory has stored therein computer program instructions that, when executed by the processor, are configured to perform the method of thickness AGC control based on tension bias detection of any one of claims 1 to 7.
10. A storage medium having stored thereon program instructions for executing the thickness AGC control method based on tension bias detection as claimed in any one of claims 1 to 7 when executed.
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