An agc speed compensation method and system with inter-rack volume priority control

Abstract

The application discloses a kind of AGC speed compensation method and system with inter-stand loop quantity priority control, belong to hot continuous rolling automation control technical field, the AGC speed compensation method includes: after loop starting, real-time detection mill roll gap and loop actual angle;By real-time using the mill roll gap of this cycle subtracts the mill roll gap of last cycle, obtain the variation of roll gap;By real-time using loop actual angle subtracts set angle, obtain the deviation of loop angle;Real-time judge whether the deviation of loop angle exceeds preset range, according to the result of judgment, in combination with the variation of roll gap, determine whether to limit AGC speed compensation amount, complete AGC speed compensation.The AGC speed compensation scheme provided by the application can more accurately perform AGC speed compensation, while ensuring inter-stand second flow balance, also effectively improves the stability of rolling.

Description

Technical Field

[0001] This invention relates to the field of automated control technology for hot continuous rolling mills, and in particular to an AGC speed compensation method and system that prioritizes the control of the amount of rolling between stands. Background Technology

[0002] In hot strip rolling systems, traditional AGC speed compensation often involves adjusting the roll gap of the downstream stand. Based on parameters such as mill stiffness, workpiece plasticity, and exit thickness, the calculation is performed to determine the change in exit thickness of the downstream stand. This allows for proportional speed adjustment of the upstream stand to ensure that the flow rate between stands is equal in real time, adhering to the principle of equal flow rate between stands.

[0003] Furthermore, in the hot strip rolling production line, the control accuracy of the looper is often directly related to the quality of the product. Looper control mainly includes looper tension control and looper height control. Looper tension control ensures constant tension of the strip between stands by using a tension closed-loop control hydraulic servo system. Looper height control ensures constant looping of the strip between stands by adjusting the speed of the upstream stand through a height closed-loop adjustment.

[0004] When the flow rate set in the model is deviated during the threading process, the looper often fails to reach the set angle after it starts to loop. If the traditional AGC speed compensation algorithm is used for adjustment, it may exacerbate the mismatch in flow rate between the frames. In severe cases, this can lead to problems such as high tension loss during looper startup or low looper angle when pulling steel. Summary of the Invention

[0005] This invention provides an AGC speed compensation method and system that prioritizes control of the inter-rack looping quantity, in order to solve the technical problems that existing AGC speed compensation methods may exacerbate the mismatch between the inter-rack flow rates, which in severe cases may lead to high slippage of the looper or low looper angle for steel pulling.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] On one hand, the present invention provides an AGC speed compensation method prioritizing inter-rack nesting quantity control, the AGC speed compensation method prioritizing inter-rack nesting quantity control includes:

[0008] After the looper is lifted, the actual angle of the mill roll gap and the looper is monitored in real time.

[0009] The change in roll gap is obtained by subtracting the roll gap of the previous cycle from the roll gap of the current cycle in real time; the deviation of the looper angle is obtained by subtracting the set angle from the actual angle of the looper in real time.

[0010] The system determines in real time whether the deviation of the looper angle exceeds the preset range. Based on the determination result and the change in the roll gap, it determines whether to limit the AGC speed compensation amount and completes the AGC speed compensation.

[0011] Furthermore, the upper limit of the preset range is 2 degrees, and the lower limit is -1 degree.

[0012] Furthermore, the real-time determination of whether the deviation of the looper angle exceeds a preset range, and based on the determination result, combined with the change in the roll gap, determining whether to limit the AGC speed compensation amount, and completing the AGC speed compensation, includes:

[0013] If the deviation of the looper angle does not exceed the preset range, the AGC speed compensation amount is not limited. At this time, the AGC speed compensation amount is determined in real time based on the second flow rate matching principle to complete the AGC speed compensation.

[0014] When the deviation of the looper angle exceeds the preset range, if the deviation of the looper angle is greater than the upper limit of the preset range and the change in roll gap is positive, or if the deviation of the looper angle is less than the lower limit of the preset range and the change in roll gap is negative, then the AGC speed compensation amount is limited, and the AGC speed compensation amount remains unchanged; otherwise, the AGC speed compensation amount is not limited, and the AGC speed compensation amount is determined in real time based on the second flow rate matching principle to complete the AGC speed compensation.

[0015] Furthermore, the formula for determining the AGC speed compensation amount in real time based on the second-flow matching principle is as follows:

[0016]

[0017] Among them, V n This represents the speed compensation value for the upstream stand; S represents the total change in roll gap, which is obtained by integrating the real-time detected change in roll gap; where, when the detected deviation of the looper angle is greater than the upper limit of the preset range and the change in roll gap is positive, or when the deviation of the looper angle is less than the lower limit of the preset range and the change in roll gap is negative, the integration of the real-time detected change in roll gap is stopped; C represents the mill stiffness coefficient; Q represents the workpiece plasticity coefficient; H represents the downstream stand exit thickness.

[0018] On the other hand, the present invention also provides an AGC speed compensation system that prioritizes inter-rack nesting quantity control, the AGC speed compensation system that prioritizes inter-rack nesting quantity control includes:

[0019] The real-time detection module is used for:

[0020] After the looper is lifted, the actual angle of the mill roll gap and the looper is monitored in real time.

[0021] The change in roll gap is obtained by subtracting the roll gap of the previous cycle from the roll gap of the current cycle in real time; the deviation of the looper angle is obtained by subtracting the set angle from the actual angle of the looper in real time.

[0022] The AGC speed compensation module is used for:

[0023] The system determines in real time whether the deviation of the looper angle exceeds the preset range. Based on the determination result and the change in the roll gap, it determines whether to limit the AGC speed compensation amount and completes the AGC speed compensation.

[0024] Furthermore, the upper limit of the preset range is 2 degrees, and the lower limit is -1 degree.

[0025] Furthermore, the AGC speed compensation module is specifically used for:

[0026] If the deviation of the looper angle does not exceed the preset range, the AGC speed compensation amount is not limited. At this time, the AGC speed compensation amount is determined in real time based on the second flow rate matching principle to complete the AGC speed compensation.

[0027] When the deviation of the looper angle exceeds the preset range, if the deviation of the looper angle is greater than the upper limit of the preset range and the change in roll gap is positive, or if the deviation of the looper angle is less than the lower limit of the preset range and the change in roll gap is negative, then the AGC speed compensation amount is limited, and the AGC speed compensation amount remains unchanged; otherwise, the AGC speed compensation amount is not limited, and the AGC speed compensation amount is determined in real time based on the second flow rate matching principle to complete the AGC speed compensation.

[0028] Furthermore, the formula for determining the AGC speed compensation amount in real time based on the second-flow matching principle is as follows:

[0029]

[0030] Among them, V n This represents the speed compensation value for the upstream stand; S represents the total change in roll gap, which is obtained by integrating the real-time detected change in roll gap; where, when the detected deviation of the looper angle is greater than the upper limit of the preset range and the change in roll gap is positive, or when the deviation of the looper angle is less than the lower limit of the preset range and the change in roll gap is negative, the integration of the real-time detected change in roll gap is stopped; C represents the mill stiffness coefficient; Q represents the workpiece plasticity coefficient; H represents the downstream stand exit thickness.

[0031] In another aspect, the present invention also provides an electronic device comprising a processor and a memory; wherein the memory stores at least one instruction, which is loaded and executed by the processor to implement the above-described method.

[0032] In another aspect, the present invention also provides a computer-readable storage medium storing at least one instruction, which is loaded and executed by a processor to implement the above method.

[0033] The beneficial effects of the technical solution provided by this invention include at least the following:

[0034] The present invention collects and judges the roll gap and looper angle of the rolling mill after the looper is started. While performing AGC speed compensation, it considers the matching degree of the flow rate between the current stands, so as to perform AGC speed compensation more accurately, ensure the balance of flow rate between the stands and improve the stability of rolling. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the execution flow of the AGC speed compensation method with priority control over inter-rack nesting provided in an embodiment of the present invention;

[0037] Figure 2 These are curves compensated by the existing AGC speed compensation algorithm; where (a) is the looper angle curve; and (b) is the mill roll gap curve.

[0038] Figure 3 These are curves compensated by the AGC speed compensation algorithm provided in this embodiment of the invention; where (a) is the looper angle curve; and (b) is the mill roll gap curve.

[0039] Figure 4 This is a system block diagram of the electronic device provided in the embodiments of the present invention. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0041] First, it should be noted that in the embodiments of the present invention, the words "exemplarily," "for example," etc., are used to indicate that they are examples, illustrations, or descriptions. Any embodiment or design scheme described as "exemplary" in the present invention should not be construed as being more preferred or advantageous than other embodiments or design schemes. Specifically, the use of the term "exemplarily" is intended to present the concept in a specific manner. Furthermore, in the embodiments of the present invention, the meaning expressed by "and / or" can be both, or it can be either one or the other.

[0042] First Embodiment

[0043] To improve stability during rolling, a better match between the flow rates per second between stands is required. However, existing AGC speed compensation methods may exacerbate the mismatch in flow rates between stands, potentially leading to technical problems such as high tension loss during looper start-up or low looper angle during steel pulling. Therefore, this embodiment provides an AGC speed compensation method that prioritizes control of the looper flow rate between stands. Its execution flow is as follows: Figure 1 As shown, this method considers the matching degree of the flow rate per second between the current stands while performing AGC speed compensation, thereby performing AGC speed compensation more accurately, ensuring the balance of flow rate per second between stands, thus stabilizing rolling between stands and ensuring product quality accuracy. This method can be implemented by electronic equipment, and specifically, the method includes the following steps:

[0044] S1, after the looper is lifted, the actual angle of the mill roll gap and the looper is detected in real time;

[0045] S2, by subtracting the mill roll gap of the previous cycle from the current cycle's roll gap in real time, the change in roll gap δS is obtained; by subtracting the set angle from the actual angle of the looper in real time, the deviation A of the looper angle is obtained. dev ;

[0046] In this embodiment, the state of the roll gap is determined by the change in roll gap. When the change in roll gap δS>0, it indicates that the roll gap is rising; when the change in roll gap δS<0, it indicates that the roll gap is pressing down.

[0047] S3 determines in real time whether the deviation of the looper angle exceeds the preset range. Based on the judgment result and the change in the roll gap, it determines whether to limit the AGC speed compensation amount and completes the AGC speed compensation.

[0048] In order to keep the looper quantity within a stable range, this embodiment defines the upper limit of the looper angle deviation as 2 degrees and the lower limit as -1 degree, and judges in real time whether the current looper angle is within a reasonable range.

[0049] When the looper angle is within the set normal range, AGC speed compensation proceeds normally. When the angle deviation exceeds the set range, further judgment is made based on the trend of the roll gap change; specifically as follows:

[0050] When the change in roll gap is positive and the deviation of looper angle is greater than the upper limit of the threshold, the angle is considered high. If positive AGC speed compensation continues, it will exacerbate the trend of high looper angle. Therefore, the AGC speed compensation amount is limited. When the change in roll gap is negative and the deviation of looper angle is less than the lower limit of the threshold, the angle is considered low. If negative AGC speed compensation continues, it will exacerbate the trend of low looper angle. Therefore, the AGC speed compensation amount is limited.

[0051] Specifically, in this embodiment, the AGC speed compensation amount is determined as follows:

[0052] The total change in roll gap, S, is obtained by integrating the final change in roll gap.

[0053]

[0054] Specifically, when the looper angle is high and the downstream frame roll gap is raised, or the looper angle is low and the downstream frame is pressed down, the integral of the roll gap change is restricted. That is, the integral of the roll gap is stopped at this time, and the AGC speed compensation value remains unchanged.

[0055] After calculating the change in workpiece thickness, the corresponding speed compensation amount is derived based on the flow rate matching principle, i.e., the speed compensation amount V for the upstream stand. n This ensures the matching of flow rates between frames. Specifically: after processing the roll gap adjustment as described above, the AGC speed compensation value is calculated using the roll gap change S, stiffness coefficient C, plasticity coefficient Q, and frame exit thickness H. That is, the speed compensation value for the upstream frame is:

[0056]

[0057] Among them, V n This represents the speed compensation value for the upstream rack.

[0058] The compensation curve obtained through the existing AGC speed compensation algorithm is as follows: Figure 2 As shown, the compensation curve obtained by the AGC speed compensation algorithm provided in this embodiment is as follows: Figure 3 As shown, it can be seen that the AGC speed compensation algorithm provided in this embodiment can perform AGC speed compensation more accurately, ensuring the balance of the flow rate between stands, thereby stabilizing the rolling process between stands and ensuring the quality and accuracy of the product.

[0059] In summary, this embodiment provides an AGC speed compensation method that prioritizes control over inter-rack nesting quantity. Through practical field application, the AGC speed compensation method provided in this embodiment can more accurately calculate the AGC speed compensation amount when there is a mismatch in inter-rack nesting quantity, ensuring that the inter-rack nesting quantity remains constant and minimizing the impact of the AGC speed compensation amount on the inter-rack nesting quantity.

[0060] Second Embodiment

[0061] This embodiment provides an AGC speed compensation system that prioritizes inter-rack nesting quantity control. This AGC speed compensation system includes the following modules:

[0062] The real-time detection module is used for:

[0063] After the looper is lifted, the actual angle of the mill roll gap and the looper is monitored in real time.

[0064] The change in roll gap is obtained by subtracting the roll gap of the previous cycle from the roll gap of the current cycle in real time; the deviation of the looper angle is obtained by subtracting the set angle from the actual angle of the looper in real time.

[0065] The AGC speed compensation module is used for:

[0066] The system determines in real time whether the deviation of the looper angle exceeds the preset range. Based on the determination result and the change in the roll gap, it determines whether to limit the AGC speed compensation amount and completes the AGC speed compensation.

[0067] It should be noted that the AGC speed compensation system with priority control over inter-rack nesting quantity in this embodiment corresponds to the AGC speed compensation method with priority control over inter-rack nesting quantity in the first embodiment described above. The functions implemented by each functional module in the AGC speed compensation system with priority control over inter-rack nesting quantity in this embodiment correspond one-to-one with the process steps in the AGC speed compensation method with priority control over inter-rack nesting quantity in the first embodiment described above; therefore, they will not be repeated here.

[0068] Third Embodiment

[0069] This embodiment provides an electronic device, such as... Figure 4 As shown, the electronic device includes a processor and a memory; wherein the processor and the memory can be connected via a communication bus; the memory stores at least one instruction, which is loaded and executed by the processor to implement the method of the first embodiment described above. Furthermore, the electronic device may also include a transceiver, the processor and the transceiver can be connected via a communication bus, and the transceiver is used to communicate with other devices.

[0070] Below, in conjunction with Figure 4 A detailed introduction to each component of this electronic device is provided below:

[0071] The processor is the control center of the electronic device. The electronic device may include multiple processors, each of which can be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). The term "processor" can refer to a single processor or a collective term for multiple processing elements. For example, a processor can be one or more central processing units (CPUs), other general-purpose processors, application-specific integrated circuits (ASICs), or one or more integrated circuits configured to implement embodiments of the present invention, such as one or more digital signal processors (DSPs), one or more field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor. The processor can perform various functions of the electronic device by running or executing software programs stored in memory and by calling data stored in memory.

[0072] In a specific implementation, as one example, the processor may include one or more CPUs, for example... Figure 4 CPU0 and CPU1 shown are, of course, merely illustrative examples.

[0073] The memory is used to store the software program that executes the solution of the present invention, and the processor controls its execution. For specific implementation methods, please refer to the above method embodiments, which will not be repeated here.

[0074] Optionally, the memory may be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but not limited thereto. The memory may be integrated with the processor or may exist independently, and may be accessed through the interface circuit of the electronic device (…). Figure 4 (Not shown in the image) is coupled to the processor; however, this embodiment of the invention does not impose specific limitations on this.

[0075] The transceiver may include a receiver and a transmitter. Figure 4 (Not shown separately). The receiver is used to implement the receiving function, and the transmitter is used to implement the transmitting function. The transceiver can be integrated with the processor or exist independently, and is connected through the interface circuit of the electronic device (…). Figure 4 (Not shown in the image) is coupled to the processor, and this embodiment of the invention does not specifically limit this.

[0076] In addition, it should be noted that, Figure 4 The structure of the electronic device shown is not intended to limit the device. Actual devices may include more or fewer components than shown, or combine certain components, or have different component arrangements. Furthermore, the technical effects achieved by this electronic device when performing the method of the first embodiment described above can be referenced to the technical effects described in the first embodiment; therefore, they will not be repeated here.

[0077] Fourth embodiment

[0078] This embodiment provides a computer-readable storage medium storing at least one instruction, which is loaded and executed by a processor to implement the method of the first embodiment described above. The computer-readable storage medium may be a ROM, random access memory, CD-ROM, magnetic tape, floppy disk, or optical data storage device, etc. The instruction stored therein can be loaded and executed by a processor in a terminal.

[0079] Furthermore, it should be noted that the present invention can be provided as a method, apparatus, or computer program product. Therefore, embodiments of the present invention can take the form of a completely or partially hardware embodiment, a completely or partially software embodiment, or an embodiment combining software and hardware aspects. Moreover, when implemented in software, embodiments of the present invention can take the form of a computer program product implemented on one or more computer-usable storage media containing computer-usable program code. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, all or part of the processes or functions described in the embodiments of the present invention are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any usable medium accessible to a computer or a data storage device such as a server or data center containing one or more sets of usable media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. A semiconductor medium can be a solid-state drive (SSD).

[0080] Embodiments of the present invention are described with reference to flowchart illustrations and / or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, embedded processor, or other programmable data processing terminal device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal device, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0081] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing terminal device to operate in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1The functions specified in one or more boxes. These computer program instructions may also be loaded onto a computer or other programmable data processing terminal equipment to cause a series of operational steps to be performed on the computer or other programmable terminal equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable terminal equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0082] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element. Furthermore, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone, where A and B can be singular or plural. Additionally, the character " / " in this text generally indicates an "or" relationship between the preceding and following objects, but it can also indicate an "AND / OR" relationship. Please refer to the context for specific interpretations. "At least one" refers to one or more items, while "more than" refers to two or more items. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or multiple items. For example, at least one of a, b, or c can be represented as: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0083] Furthermore, it is understood that in various embodiments of the present invention, the order of the above-mentioned process numbers does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0084] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0085] In the several embodiments provided by this invention, it should be understood that the disclosed devices, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of functional modules / 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 device, or some features may be ignored or not executed. Furthermore, the shown or discussed mutual couplings or direct couplings or communication connections may be through some interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms. Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, i.e., 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. Additionally, the functional units in the various embodiments of this invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0086] If the method 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 the present invention, or the part that contributes to the prior art, or a 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 described in the various embodiments of the present invention. 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.

[0087] Finally, it should be noted that the above description represents a preferred embodiment of the present invention. It should be pointed out that although preferred embodiments have been described, those skilled in the art, once they understand the basic inventive concept of the present invention, can make various improvements and modifications without departing from the principles described herein. These improvements and modifications should also be considered within the scope of protection of the present invention. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present invention.

Claims

1. An AGC speed compensation method with inter- rack setpoint priority control, characterized by, include: After the looper is lifted, the actual angle of the mill roll gap and the looper is monitored in real time. The change in roll gap is obtained by subtracting the roll gap of the previous cycle from the roll gap of the current cycle in real time. The deviation of the loop angle is obtained by subtracting the set angle from the actual angle of the loop in real time; The system can determine in real time whether the deviation of the looper angle exceeds the preset range. Based on the judgment result and the change in the roll gap, it can determine whether to limit the AGC speed compensation amount and complete the AGC speed compensation. The upper limit of the preset range is 2 degrees, and the lower limit is -1 degree; The real-time determination of whether the deviation of the looper angle exceeds the preset range, and based on the determination result and the change in roll gap, determining whether to limit the AGC speed compensation amount, and completing the AGC speed compensation, includes: If the deviation of the looper angle does not exceed the preset range, the AGC speed compensation amount is not limited. At this time, the AGC speed compensation amount is determined in real time based on the second flow rate matching principle to complete the AGC speed compensation. When the deviation of the looper angle exceeds the preset range, if the deviation of the looper angle is greater than the upper limit of the preset range and the change in the roll gap is positive, or if the deviation of the looper angle is less than the lower limit of the preset range and the change in the roll gap is negative, then the AGC speed compensation amount is limited, and the AGC speed compensation amount remains unchanged. Otherwise, no limit is placed on the AGC speed compensation amount. In this case, the AGC speed compensation amount is determined in real time based on the second flow matching principle to complete the AGC speed compensation.

2. The AGC speed compensation method based on priority control of inter-rack nesting quantity as described in claim 1, characterized in that, The formula for determining the AGC speed compensation amount in real time based on the second-flow matching principle is as follows: ； in, This represents the speed compensation value for the upstream rack; This represents the total change in roll gap, obtained by integrating the real-time detected change in roll gap. When the detected deviation of the looper angle is greater than the upper limit of the preset range and the change in the roll gap is positive, or when the deviation of the looper angle is less than the lower limit of the preset range and the change in the roll gap is negative, the integration of the real-time detected change in the roll gap is stopped. Indicates the mill stiffness coefficient; Indicates the plasticity coefficient of the rolled product; This indicates the thickness of the downstream rack outlet.

3. An AGC speed compensation system based on priority control of inter-rack nesting, characterized in that, include: The real-time detection module is used for: After the looper is lifted, the actual angle of the mill roll gap and the looper is monitored in real time. The change in roll gap is obtained by subtracting the roll gap of the previous cycle from the roll gap of the current cycle in real time; the deviation of the looper angle is obtained by subtracting the set angle from the actual angle of the looper in real time. The AGC speed compensation module is used for: The system can determine in real time whether the deviation of the looper angle exceeds the preset range. Based on the judgment result and the change in the roll gap, it can determine whether to limit the AGC speed compensation amount and complete the AGC speed compensation. The upper limit of the preset range is 2 degrees, and the lower limit is -1 degree; The AGC speed compensation module is specifically used for: If the deviation of the looper angle does not exceed the preset range, the AGC speed compensation amount is not limited. At this time, the AGC speed compensation amount is determined in real time based on the second flow rate matching principle to complete the AGC speed compensation. When the deviation of the looper angle exceeds the preset range, if the deviation of the looper angle is greater than the upper limit of the preset range and the change in the roll gap is positive, or if the deviation of the looper angle is less than the lower limit of the preset range and the change in the roll gap is negative, then the AGC speed compensation amount is limited, and the AGC speed compensation amount remains unchanged. Otherwise, no limit is placed on the AGC speed compensation amount. In this case, the AGC speed compensation amount is determined in real time based on the second flow matching principle to complete the AGC speed compensation.

4. The AGC speed compensation system with priority control based on inter-rack nesting quantity as described in claim 3, characterized in that, The formula for determining the AGC speed compensation amount in real time based on the second-flow matching principle is as follows: ； in, This represents the speed compensation value for the upstream rack; This represents the total change in roll gap, obtained by integrating the real-time detected change in roll gap. When the detected deviation of the looper angle is greater than the upper limit of the preset range and the change in the roll gap is positive, or when the deviation of the looper angle is less than the lower limit of the preset range and the change in the roll gap is negative, the integration of the real-time detected change in the roll gap is stopped. Indicates the mill stiffness coefficient; Indicates the plasticity coefficient of the rolled product; This indicates the thickness of the downstream rack outlet.

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