Thickness agc control method based on tension deviation detection and related device

Abstract

The application provides a thickness AGC control method based on tension deviation detection and related equipment. The method comprises the following steps: measuring actual tension T act in real time; obtaining a tension setting value signal T ref , a thickness signal and a width signal of a strip; calculating unit tension deviation ΔT by using the tension setting value signal T ref , the thickness signal and the width signal and the actual tension T act ; calculating a change rate of the unit tension deviation based on the unit tension deviation ΔT; and obtaining a roll gap adjustment amount ΔS based on the change rate of the unit tension deviation. Thus, a thickness control method based on tension deviation is established. For raw materials, such as head and tail of tinned cold hard base plate or high-strength steel cold hard base plate, thickness fluctuation with high amplitude and high frequency caused by factors such as performance fluctuation can be well controlled in time, so that the thickness of the strip is stable, and the number of waste and defective products caused by thickness exceeding the standard is reduced.

Description

Technical Field

[0001] This invention relates to the field of metallurgical thickness control technology, and more specifically, 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 Technology

[0002] Currently, AGC (Auto Gauge Control) is a key technology for achieving stable thickness control in cold rolling mills. Its principle is to continuously measure and calculate the metal flow rate per second of the strip using equipment such as thickness gauges, speed gauges, and pressure heads, and to adjust the roll gap and speed of the mill using the deviation signal. However, for raw materials, such as tin-plated cold-rolled substrates or high-strength steel cold-rolled substrates, the thickness fluctuations at the beginning and end are caused by factors such as performance fluctuations. Existing conventional AGC models cannot achieve fast and effective control of the thickness of cold rolling mills due to time lags in thickness measurement or program operation and the widespread use of integral control algorithms. This can easily lead to unstable thickness throughout the roll and an increase in the number of defective products with excessive thickness.

[0003] Therefore, a new technical solution is urgently needed to solve the above-mentioned technical problems. Summary of the Invention

[0004] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. The summary section of this invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] In a first aspect, the present invention proposes a thickness AGC control method based on tension deviation detection, comprising:

[0006] Real-time measurement of actual tension T act ;

[0007] Acquire the tension setpoint signal T of the strip. ref Thickness signal, width signal, and tension setpoint signal T ref Thickness signal, width signal, and actual tension T act Calculate the unit tension deviation ΔT;

[0008] Calculate the rate of change of the unit tension deviation based on the unit tension deviation ΔT;

[0009] The roll gap adjustment ΔS is obtained based on the rate of change of unit tension deviation.

[0010] Optionally, the above method uses the tension setpoint signal T refThickness signal, width information and actual tension T act Calculating the unit tension deviation ΔT can include:

[0011] The unit tension deviation ΔT is calculated using the following formula:

[0012] ΔT=(T ref -T act ) / h×w, where h represents the thickness signal and w represents the width signal.

[0013] Optionally, the above method, based on the unit tension deviation ΔT, calculates the rate of change of the unit tension deviation, which may include:

[0014] Store ΔT in a temporary register to calculate the deviation signal ΔT' according to the proportional-integral control algorithm;

[0015] The rate of change of the unit tension deviation is obtained by subtracting the unit tension deviation ΔT from the deviation signal ΔT'.

[0016] Optionally, the above method, based on the rate of change of unit tension deviation, to obtain the roll gap adjustment ΔS, may include:

[0017] The roll gap adjustment ΔS is calculated using the following formula: ΔS=(ΔT-ΔT')×K p +∫(ΔT-ΔT')×K i , where K p For proportional control coefficient, K i This is the integral control coefficient.

[0018] Optionally, the above methods also include:

[0019] The roll gap adjustment is controlled in an open-loop manner.

[0020] Optionally, the above method for open-loop control of the roll gap adjustment may include:

[0021] Set a saturation output limit for the roll gap adjustment amount;

[0022] Based on the saturated output limiting, the saturated roll gap adjustment is controlled in an open-loop manner.

[0023] Optionally, the above method, based on saturated output limiting, performs open-loop control of the saturated roll gap adjustment, which may include:

[0024] The roll gap adjustment amount ΔS is monitored in real time. When the monitored roll gap adjustment amount ΔS is greater than or less than the saturation output limit, the monitored roll gap adjustment amount ΔS is adjusted to the saturation output limit.

[0025] Secondly, a thickness AGC control device based on tension deviation detection is also proposed, comprising:

[0026] The measurement module is used to measure the actual tension T in real time. act ;

[0027] The first calculation module is used to acquire the tension setpoint signal T of the strip. ref Thickness signal, width signal, and tension setpoint signal T ref Thickness signal, width signal, and actual tension T act Calculate the unit tension deviation ΔT;

[0028] The second calculation module is used to calculate the rate of change of the unit tension deviation based on the unit tension deviation ΔT.

[0029] The acquisition module is used to obtain the roll gap adjustment amount ΔS based on the rate of change of unit tension deviation.

[0030] Thirdly, an electronic device is also proposed, including a processor and a memory, wherein the memory stores computer program instructions, which are executed by the processor to perform the thickness AGC control method based on tension deviation detection as described above.

[0031] Fourthly, a storage medium is also proposed, on which program instructions are stored. When the program instructions are run, they are used to execute the thickness AGC control method based on tension deviation detection as described above.

[0032] Based on the above technical solution, the actual tension T is measured in real time. act ; Obtain the tension setpoint signal T of the strip. ref Thickness signal, width signal, and tension setpoint signal T ref Thickness signal, width signal, and actual tension T act The unit tension deviation ΔT is calculated; based on ΔT, the rate of change of the unit tension deviation is calculated; and based on the rate of change of the unit tension deviation, the roll gap adjustment ΔS is obtained. Thus, a thickness control method based on tension deviation is established, which specifically controls high-amplitude, high-frequency thickness fluctuations. By detecting real-time tension and calculating the unit tension deviation based on strip scanning information, the rate of change of the unit tension deviation is calculated, and the roll gap adjustment is then adjusted to improve the thickness control at the beginning and end of tin-plated chilled substrates and high-strength steel chilled substrates, achieving stable through-coil thickness and reducing the number of defective products exceeding thickness limits.

[0033] The thickness AGC control method based on tension deviation detection of the present invention, other advantages, objectives and features of the present invention will be apparent in part from the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. Attached Figure Description

[0034] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit this specification. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0035] Figure 1 A schematic flowchart of a thickness AGC control method based on tension deviation detection according to an embodiment of the present invention is shown;

[0036] Figure 2 A schematic flowchart illustrating the calculation of the deviation signal using a proportional-integral control algorithm according to an embodiment of the present invention is shown.

[0037] Figure 3 A schematic flowchart is shown, illustrating the combination of proportional and integral algorithms and setting the roll gap saturation output limit according to an embodiment of the present invention.

[0038] Figure 4 A schematic block diagram of a thickness AGC control device based on tension deviation detection provided in an embodiment of the present invention is shown.

[0039] Figure 5 A schematic block diagram of an electronic device provided by an embodiment of the present invention is shown. Detailed Implementation

[0040] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus. The technical solutions of the embodiments of this application will now be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them.

[0041] According to a first aspect of the present invention, a thickness AGC control method based on tension deviation detection is proposed. Figure 1A schematic flowchart of a thickness AGC control method based on tension deviation detection according to an embodiment of the present invention is shown. Figure 1 As shown, the method includes:

[0042] S110, Real-time measurement of actual tension T act .

[0043] It should be noted that the tension meter is installed at the front of the rack to measure the actual tension T in real time. act The value is... It's understandable that tension acts as a bridge and link between the parameters of each stand. The tension control system is a variable parameter system under high real-time requirements. Tension is also an important phenomenon in the continuous rolling process. Each stand is interconnected through the transmission of influence and energy via strip tension. Tension arises from the speed incoordination between stands. For example, when two stands experience changes in external disturbances or adjustments, causing a decrease in the strip exit speed of mill A (specifically, this decrease could be due to a decrease in roll speed, a decrease in forward slip due to changes in reduction rate or other process parameters, or an increase in the strip entry speed of mill B), or alternatively, an increase in roll speed or a decrease in backward slip, the result is a pulling sensation between the strips of mills A and B, thus generating tension. Therefore, tension control is a key issue in continuous rolling. High-value tension rolling is an important characteristic of cold continuous strip rolling production. A reasonable tension regime can ensure the stability of the rolling process and has an important impact on the quality control of finished strip and coil. Therefore, this method is based on tension deviation detection. In the actual rolling process, when the thickness change point enters the roll gap, due to the change in flow rate per second, the tension in front of the stand will generate a large tension change, which is synchronized with the position of the thickness difference and has no positional lag problem.

[0044] S120, Obtain the tension setpoint signal T of the strip. ref Thickness signal, width signal, and tension setpoint signal T ref Thickness signal, width signal, and actual tension T act Calculate the unit tension deviation ΔT.

[0045] It should be noted that the tension setting value, thickness signal, and width signal of the scanned strip are obtained to determine the tension setting value, thickness, and width of the strip. The principle of tension setting is based on "strip shape priority." The tension setting value is important. When determining the rolling tension, the front tension is generally greater than the rear tension, which is beneficial to the stability of the rolling process. If the thickness of the strip reaches 1 / 100 of the roll diameter or less, the rear tension can be equal to or greater than the front tension to facilitate the deformation and thickness control of the steel strip. In a conventional sense, during the first pass of rolling, because the coiling tension of the pickling unit is relatively small, in order to avoid interlayer misalignment of the steel strip and scratching the surface, the rear tension of the first pass is very small, less than the coiling tension of the pickling unit. In order to increase the rear tension of the first pass, a pressure plate is installed on the entrance side of the 20-roll mill to increase the rear tension of the rolling. The tension of each pass should also be adjusted at any time according to the strip shape, especially when the rolled strip is thin. When there are waves in the middle of the material, the tension should be reduced to prevent the strip edge from tearing or breaking; when the strip has edge waves, the tension can be increased appropriately.

[0046] S130. Calculate the rate of change of the unit tension deviation based on the unit tension deviation ΔT.

[0047] It is understandable that the actual tension T act Since it is constantly changing, the unit tension deviation ΔT must also change accordingly. Based on the interval of each scan of the strip, the rate of change of the unit tension deviation ΔT within the cycle is calculated.

[0048] S140. Based on the rate of change of unit tension deviation, obtain the roll gap adjustment amount ΔS.

[0049] Understandably, the required adjustment amount ΔS for the mill roll gap is calculated using the PI proportional-integral control algorithm based on the rate of change of the unit tension deviation calculated in step S130.

[0050] Based on the above technical solution, the actual tension T is measured in real time. act ; Obtain the tension setpoint signal T of the strip. ref Thickness signal, width signal, and tension setpoint signal T ref Thickness signal, width signal, and actual tension T act The unit tension deviation ΔT is calculated; based on ΔT, the rate of change of the unit tension deviation is calculated; based on the rate of change of the unit tension deviation, the roll gap adjustment ΔS is obtained. Thus, a thickness control method based on tension deviation is established. For raw materials, such as tin-plated chilled substrates or high-strength steel chilled substrates, which experience high amplitude and high frequency thickness fluctuations at the beginning and end due to performance variations, this method provides good timeliness for thickness control, thereby achieving stable through-winding thickness and reducing the number of defective products exceeding thickness limits.

[0051] In some embodiments, step S120 is achieved through the tension setpoint signal T. ref Thickness signal, width information and actual tension T act Calculating the unit tension deviation ΔT can include:

[0052] S121, the unit tension deviation ΔT is calculated using the following formula:

[0053] ΔT=(T ref -T act ) / h×w, where h represents the thickness signal and w represents the width signal.

[0054] Understandably, based on the tension setpoint signal, thickness signal, and width signal fed back by the scanning strip in step S120, the product of the feedback thickness signal value and the width signal value is used as the divisor, and the difference between the tension setpoint signal value and the actual tension value is used as the dividend. The calculated quotient is the unit tension deviation. According to the above formula, the unit tension deviation ΔT can be calculated intuitively and efficiently.

[0055] In some embodiments, step S130 above, which calculates the rate of change of the unit tension deviation based on the unit tension deviation ΔT, may include:

[0056] S131. Store ΔT in a temporary register to calculate the deviation signal ΔT' according to the proportional-integral control algorithm.

[0057] Specifically, Figure 2 A schematic flowchart illustrating the calculation of the deviation signal using a proportional-integral control algorithm according to an embodiment of the present invention is shown. Figure 2 As shown, DEV OF T45 is ΔT. DEV OF T45 is stored in a temporary register. LASTTIME VALUE is the value of the unit tension deviation ΔT at the previous moment. The time period tension deviation DELTADEVT45 is calculated. The deviation signal ΔT' is calculated using the proportional coefficient KPG and the integral coefficient KIG.

[0058] S132. Subtract the unit tension deviation ΔT from the deviation signal ΔT' to obtain the rate of change of the unit tension deviation.

[0059] Understandably, according to step S131, the tension deviation signal ΔT' of the scanned strip at the previous moment is obtained, and the difference between the unit tension deviation ΔT and the tension deviation ΔT' of the scanned strip at the previous moment is calculated to determine the rate of change of the unit tension deviation.

[0060] In some embodiments, step S140 above, which obtains the roll gap adjustment amount ΔS based on the rate of change of unit tension deviation, may include:

[0061] S141. The roll gap adjustment ΔS is calculated using the following formula: ΔS=(ΔT-ΔT')×K p +∫(ΔT-ΔT')×K i , where K p For proportional control coefficient, K i This is the integral control coefficient.

[0062] It should be noted that proportional control K p The output of the controller is proportional to the input error signal. When only proportional control is used, the system output has a steady-state error. Proportional control responds proportionally to the system deviation; once a deviation occurs, proportional control immediately takes effect to reduce it. Proportional control plays a significant role, accelerating adjustment and reducing error. Integral control K... i In integral control, the controller's output is proportional to the integral of the input error signal. For an automatic control system, if a steady-state error exists after reaching steady state, an "integral term" must be introduced into the controller to eliminate it. The error of the integral term depends on the integral over time; as time increases, the integral term increases. Even with relatively small errors, the integral term will still increase with time, driving the controller's output to further reduce the steady-state error until it equals zero. Therefore, a proportional-integral (PI) controller can eliminate steady-state error after the system reaches steady state. It can be understood that integral regulation eliminates steady-state error and improves accuracy. Because there is an error, integral regulation occurs until there is no error, at which point integral regulation stops, and the integral output becomes a constant value. The strength of the integral action depends on the integral time constant Ti; the smaller Ti is, the stronger the integral action. Conversely, a larger Ti results in a weaker integral action. Adding integral regulation can decrease system stability and slow down the dynamic response. Integral action is often combined with two other regulation laws to form a PI controller.

[0063] In some embodiments, the above method may further include step S150, performing open-loop control of the roll gap adjustment amount.

[0064] As is understandable, open-loop control means that the output of the controlled object, i.e., the controlled variable, has no effect on the output of the controller. In this type of control system, there is no reliance on feeding the controlled variable back to form any closed-loop circuit. This step performs open-loop control on the roll gap adjustment to facilitate subsequent saturation design of the roll gap.

[0065] In some embodiments, step S150 of performing open-loop control of the roll gap adjustment amount may include:

[0066] S151. Set the saturation output limit for the roll gap adjustment amount.

[0067] Understandably, to obtain high-quality rolled strip, the roll gap must be constantly adjusted to suit the crown of the raw material and to compensate for the influence of various factors on the roll gap. For strips of different widths, thicknesses, and alloys, there is only one optimal crown for the rolls to produce the ideal target roll gap. Therefore, roll gap control is essentially the control of the load-bearing roll gap. Unlike thickness control, which only requires controlling the opening accuracy at the midpoint of the roll gap, roll gap control must control the entire roll gap shape across the width span of the rolled piece. Therefore, if the roll gap adjustment amount is not set with a saturation output limit, the roll gap adjustment amount will overshoot. To prevent roll gap control overshoot, a roll gap control saturation design is added to the model design. Specifically, Figure 3 This is a schematic program diagram illustrating the merging of proportional and integral algorithms in the output and setting a saturation output limit for the roll gap. (See diagram for example.) Figure 3 As shown, INTEGRAL is the value calculated by the integral algorithm, PORPROTIONAL is the value calculated by the proportional-integral algorithm, and the two are combined to set the roll gap saturation output limit. UPPER LIMIT G is the upper limit output limit, and LOWER LIMIT G is the lower limit output limit.

[0068] S152. Based on the saturated output limiting, the saturated roll gap adjustment is controlled in an open-loop manner.

[0069] It should be noted that, based on the saturated output limit set in step S151, open-loop control of the saturated roll gap adjustment amount can be performed, allowing adjustment within the saturated output limit or setting a saturation limit. For example, in... Figure 3 In the illustrated embodiment, the saturated output limiting is 300µm and -300µm, i.e. Figure 3 The 3000 shown is an example. It can be understood that the saturated roll gap adjustment can be controlled based on the set saturated output limit. Any existing or future control method capable of open-loop control of the saturated roll gap adjustment is within the scope of this application; no specific control method is limited herein.

[0070] In one specific embodiment, step S152 above, based on saturated output limiting, performs open-loop control of the saturated roll gap adjustment amount, which may include:

[0071] S152A: Real-time monitoring of roll gap adjustment amount ΔS. When the monitored roll gap adjustment amount ΔS is greater than or less than the saturation output limit, the monitored roll gap adjustment amount ΔS is adjusted to the saturation output limit.

[0072] See you again Figure 3 ,exist Figure 3In the illustrated embodiment, the saturated output limit is set to 300µm or -300µm. Therefore, during actual monitoring, if the roll gap adjustment ΔS is greater than 300µm or less than -300µm, the roll gap adjustment ΔS stops changing unidirectionally. Based on the roll gap adjustment ΔS calculated in step S140, if ΔS is greater than 300µm, the roll gap adjustment ΔS is controlled at 300µm; if the roll gap adjustment ΔS is less than -300µm, the roll gap adjustment ΔS is controlled at -300µm to prevent roll gap control overshoot and achieve the effect of protecting rolling stability.

[0073] According to a second aspect of the invention, a thickness AGC control device based on tension deviation detection is also proposed. Figure 4 A schematic block diagram of a thickness AGC control device 400 based on tension deviation detection according to an embodiment of the present invention is shown. Figure 4 As shown, the device may include:

[0074] Measurement module 410 is used to measure the actual tension T in real time. act ;

[0075] The first calculation module 420 is used to acquire the tension setpoint signal T of the strip. ref Thickness signal, width signal, and tension setpoint signal T ref Thickness signal, width signal, and actual tension T act Calculate the unit tension deviation ΔT;

[0076] The second calculation module 430 is used to calculate the rate of change of the unit tension deviation based on the unit tension deviation ΔT.

[0077] The acquisition module 440 is used to acquire the roll gap adjustment amount ΔS based on the rate of change of unit tension deviation.

[0078] According to a third aspect of the invention, an electronic device is also provided. Figure 5 A schematic block diagram of an electronic device provided by an embodiment of the present invention is shown. Figure 5 As shown, the device includes at least one processor 510, and at least one memory 520 and bus 530 connected to the processor 510; wherein the processor 510 and the memory 520 communicate with each other through the bus 530; the processor 510 is used to call program instructions in the memory 520 to execute the above-mentioned thickness AGC control method based on tension deviation detection.

[0079] The devices mentioned in this article can be servers, PCs, tablets, mobile phones, etc.

[0080] This application also provides a computer program product, which, when executed on a data processing device, is suitable for executing a program that initializes the following method steps:

[0081] Real-time measurement of actual tension T act ;

[0082] Acquire the tension setpoint signal T of the strip. ref Thickness signal, width signal, and tension setpoint signal T ref Thickness signal, width signal, and actual tension T act Calculate the unit tension deviation ΔT;

[0083] Calculate the rate of change of the unit tension deviation based on the unit tension deviation ΔT;

[0084] The roll gap adjustment ΔS is obtained based on the rate of change of unit tension deviation.

[0085] Furthermore, the above method uses the tension setpoint signal T ref Thickness signal, width signal, and actual tension T act Calculating the unit tension deviation ΔT can include:

[0086] The unit tension deviation ΔT is calculated using the following formula:

[0087] ΔT=(T ref -T act ) / h×w, where h represents the thickness signal and w represents the width signal.

[0088] Furthermore, the above method, which calculates the rate of change of the unit tension deviation based on the unit tension deviation ΔT, may include:

[0089] Store ΔT in a temporary register to calculate the deviation signal ΔT' according to the proportional-integral control algorithm;

[0090] The rate of change of the unit tension deviation is obtained by subtracting the unit tension deviation ΔT from the deviation signal ΔT'.

[0091] Furthermore, the above method, based on the rate of change of unit tension deviation, can obtain the roll gap adjustment ΔS, which may include:

[0092] The roll gap adjustment ΔS is calculated using the following formula: ΔS=(ΔT-ΔT')×K p +∫(ΔT-ΔT')×K i Where Kp is the proportional control coefficient and Ki is the integral control coefficient.

[0093] Furthermore, the above methods also include:

[0094] The roll gap adjustment is controlled in an open-loop manner.

[0095] Furthermore, the above method for open-loop control of the roll gap adjustment can include:

[0096] Set a saturation output limit for the roll gap adjustment amount;

[0097] Based on the saturated output limiting, the saturated roll gap adjustment is controlled in an open-loop manner.

[0098] Furthermore, the above method, based on saturated output limiting, performs open-loop control of the saturated roll gap adjustment, which may include:

[0099] The roll gap adjustment amount ΔS is monitored in real time. When the monitored roll gap adjustment amount ΔS is greater than or less than the saturation output limit, the monitored roll gap adjustment amount ΔS is adjusted to the saturation output limit.

[0100] Fourthly, a storage medium is also proposed, on which program instructions are stored. These program instructions, when executed, are used to perform the thickness AGC control method based on tension deviation detection as described above. The storage medium may, for example, include a storage component of a tablet computer, a hard disk of a computer, a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a portable compact disc read-only memory (CD-ROM), a USB memory, or any combination of the above storage media. A computer-readable storage medium may be any combination of one or more computer-readable storage media.

[0101] Those skilled in the art can understand the specific details and beneficial effects of the thickness AGC control device, electronic equipment, and storage medium based on tension deviation detection by reading the above description of the thickness AGC control method based on tension deviation detection, and will not be repeated here for the sake of brevity.

[0102] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and / or device can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0103] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0104] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0105] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0106] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A thickness AGC control method based on tension deviation detection, characterized in that, include: Real-time measurement of actual tension T act ; Acquire the tension setpoint signal T of the strip. ref Thickness signal, width signal, so as to pass through the tension setpoint signal T ref The thickness signal, the width signal, and the actual tension T act Calculate the unit tension deviation ΔT; Calculate the rate of change 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 ΔS is obtained; The tension set value signal T ref The thickness signal, the width signal, and the actual tension T act Calculating the unit tension deviation ΔT includes: The unit tension deviation ΔT is calculated using the following formula: Where h represents the thickness signal and w represents the width signal; The roll gap adjustment amount is controlled in an open-loop manner; The open-loop control of the roll gap adjustment includes: For the roll gap adjustment amount, a saturation output limit is set for the roll gap adjustment amount; Based on the aforementioned saturated output limit, the saturated roll gap adjustment is controlled in an open-loop manner. The open-loop control of the saturated roll gap adjustment based on the saturated output limiting includes: The roll gap adjustment amount ΔS is monitored in real time. When the monitored roll gap adjustment amount ΔS is greater than or less than the saturation output limit, the monitored roll gap adjustment amount ΔS is adjusted to the saturation output limit.

2. The thickness AGC control method based on tension deviation detection as described in claim 1, characterized in that, The calculation of the rate of change of the unit tension deviation based on the unit tension deviation ΔT includes: The ΔT is stored in a temporary register to calculate the deviation signal ΔT' according to the proportional-integral control algorithm; The rate of change of the unit tension deviation is obtained by subtracting the unit tension deviation ΔT from the deviation signal ΔT'.

3. The thickness AGC control method based on tension deviation detection as described in claim 2, characterized in that, The step of obtaining the roll gap adjustment amount ΔS based on the rate of change of the unit tension deviation includes: The roll gap adjustment amount ΔS is calculated according to the following formula: , where K p For proportional control coefficient, K i This is the integral control coefficient.

4. A thickness AGC control device based on tension deviation detection, used to implement the control method according to any one of claims 1-3, characterized in that, include: The measurement module is used to measure the actual tension T in real time. act ; The first calculation module is used to acquire the tension setpoint signal T of the strip. ref Thickness signal, width signal, so as to pass through the tension setpoint signal T ref The thickness signal, the width signal, and the actual tension T act Calculate the unit tension deviation ΔT; The second calculation module is used to calculate the rate of change of the unit tension deviation based on the unit tension deviation ΔT. The acquisition module is used to acquire the roll gap adjustment amount ΔS based on the rate of change of the unit tension deviation.

5. An electronic device, characterized in that, It includes a processor and a memory, wherein the memory stores computer program instructions, which, when executed by the processor, are used to perform the thickness AGC control method based on tension deviation detection as described in any one of claims 1 to 3.

6. A storage medium storing program instructions that, when executed, perform the thickness AGC control method based on tension deviation detection as described in any one of claims 1 to 3.

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