Rolling mill rolling force feedforward control method, device, medium and equipment

Abstract

The application discloses a rolling mill rolling force feedforward control method, device, medium and equipment, and the method comprises the following steps: acquiring a rolling force change amount within a preset time; acquiring an adjustment proportion coefficient between a rolling force change and a plate shape control measure set, the plate shape control measure set comprising a plurality of plate shape control measures, the plurality of plate shape control measures at least comprising a rolling force control measure, and the adjustment proportion coefficient being used for representing a compensation unit rolling force change ratio corresponding to an adjustment amount of the rolling force control measure; and determining a feedforward adjustment amount corresponding to the rolling force control measure according to the rolling force change amount and the adjustment proportion coefficient. Through the technical scheme provided by the application, the rolling force can be feedforward controlled, and the plate shape quality of the strip steel is improved.

Description

Technical Field

[0001] This application belongs to the field of rolling mill parameter control technology, and in particular relates to rolling mill rolling force feedforward control methods, devices, media and equipment. Background Technology

[0002] During the rolling process, the strip thickness may vary at different locations on the steel coil, resulting in fluctuations in the required rolling force. These fluctuations can affect the strip shape quality. Therefore, how to implement feedforward control of the rolling force to ensure strip shape quality has become a pressing technical problem that needs to be solved. Summary of the Invention

[0003] The embodiments of this application provide a method, apparatus, medium, and equipment for feedforward control of rolling force in a rolling mill, thereby improving the strip shape quality at least to some extent by feeding forward control of the rolling force.

[0004] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.

[0005] According to a first aspect of the embodiments of this application, a method for feedforward control of rolling force in a rolling mill is provided, comprising:

[0006] Obtain the change in rolling force within a preset time period;

[0007] Obtain the adjustment ratio coefficient between the rolling force change and the strip shape control measure set, wherein the strip shape control measure set includes multiple strip shape control measures, and the multiple strip shape control measures include at least rolling force control measures. The adjustment ratio coefficient is used to characterize the compensation unit rolling force change ratio, and the adjustment amount corresponding to the rolling force control measures.

[0008] Based on the change in rolling force and the adjustment ratio coefficient, the feedforward adjustment amount corresponding to the rolling force control measure is determined.

[0009] In some embodiments of this application, based on the foregoing scheme, obtaining the change in rolling force within a preset time period includes:

[0010] Obtain the actual thickness of each strip steel sampling point measured by the thickness measuring device within a preset time period;

[0011] Based on the preset correspondence between actual thickness and actual rolling force, determine each actual rolling force;

[0012] After smoothing each actual rolling force, it is compared with each corresponding target rolling force to obtain the rolling force change within a preset time.

[0013] In some embodiments of this application, based on the foregoing scheme, obtaining the adjustment ratio coefficient between the rolling force change and the strip shape control measure set includes:

[0014] Obtain the first influence coefficient of the rolling force change on the roll gap, and the second influence coefficient of the strip shape control measures set on the roll gap;

[0015] The adjustment ratio coefficient is determined based on the first influence coefficient and the second influence coefficient.

[0016] In some embodiments of this application, based on the foregoing scheme, determining the adjustment ratio coefficient according to the first influence coefficient and the second influence coefficient includes:

[0017] Based on the first influence coefficient and the second influence coefficient, the adjustment ratio coefficient is calculated using the least squares fitting method, as follows:

[0018]

[0019] Wherein, αF represents the adjustment ratio coefficient, n represents the number of discrete units of the strip, i represents the i-th discrete unit among the n discrete units, effp(i) represents the first influence coefficient of the rolling force change on the roll gap, and eff(i) represents the second influence coefficient of the strip shape control measures set on the roll gap.

[0020] In some embodiments of this application, based on the foregoing scheme, the feedforward adjustment amount corresponding to the rolling force control measure is determined based on the following formula:

[0021] ΔF=αF×ΔF R ×g;

[0022] Wherein, ΔF represents the feedforward adjustment amount corresponding to the rolling force control measure, ΔF R This represents the change in rolling force over a preset time period, and g represents the feedforward gain.

[0023] In some embodiments of this application, based on the foregoing scheme, the method further includes:

[0024] Obtain the remaining adjustment deviation of each of the multiple shape control measures other than the rolling force control measure;

[0025] Based on the remaining deviation of each adjustment, the priority of other shape control measures in compensating for changes in rolling force is determined.

[0026] In some embodiments of this application, based on the foregoing scheme, the remaining adjustment deviation is determined using the following formula:

[0027]

[0028] Where rdev represents the adjustment of the remaining deviation, n represents the number of discrete units of the strip, i represents the i-th discrete unit among the n discrete units, effp(i) represents the first influence coefficient of the rolling force change on the roll gap, eff(i) represents the second influence coefficient of the strip shape control measures set on the roll gap, βF represents the adjustment ratio coefficient corresponding to one of the strip shape control measures, and step represents the adjustment step size.

[0029] According to a second aspect of the embodiments of this application, a mill rolling force feedforward control device is provided, comprising:

[0030] The first acquisition unit is used to acquire the change in rolling force within a preset time period;

[0031] The second acquisition unit is used to acquire the adjustment ratio coefficient between the rolling force change and the strip shape control measure set, wherein the strip shape control measure set includes multiple strip shape control measures, and the multiple strip shape control measures include at least rolling force control measures. The adjustment ratio coefficient is used to characterize the compensation unit rolling force change ratio and the adjustment amount corresponding to the rolling force control measures.

[0032] The determining unit is used to determine the feedforward adjustment amount corresponding to the rolling force control measure based on the rolling force change and the adjustment ratio coefficient.

[0033] According to a third aspect of the embodiments of this application, a computer-readable storage medium is provided, the computer-readable storage medium storing at least one computer program instruction, the at least one computer program instruction being loaded and executed by a processor to perform the operation as described in any of the methods in the first aspect.

[0034] According to a fourth aspect of the present application, an electronic device is provided, including one or more processors and one or more memories, wherein at least one piece of program code is stored in the one or more memories, the at least one piece of program code being loaded and executed by the one or more processors to perform the operations performed as described in any of the methods in the first aspect.

[0035] The one or more technical solutions provided in the embodiments of the present invention achieve at least the following technical effects or advantages:

[0036] This application determines the compensation unit rolling force change ratio and the corresponding adjustment amount of the rolling force control measures by obtaining the adjustment ratio coefficient between the rolling force change and the set of various strip shape control measures; based on the rolling force change and the adjustment ratio coefficient, it determines the feedforward adjustment amount corresponding to the rolling force control measures, thereby enabling compensation for the rolling force change according to the feedforward adjustment amount, avoiding the impact of rolling force fluctuations on strip shape, and improving strip shape quality.

[0037] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0038] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0039] Figure 1 This is a flowchart of the mill rolling force feedforward control method according to an embodiment of this application;

[0040] Figure 2 This is a structural diagram of the mill rolling force feedforward control device according to an embodiment of this application;

[0041] Figure 3 This is a schematic diagram of the structure of a computer system suitable for implementing the electronic device of the present application. Detailed Implementation

[0042] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0043] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0044] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0045] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0046] It should also be noted that the terms "first," "second," etc., 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 uses of these terms can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described.

[0047] First, it should be noted that in the embodiments of this application, the rolling mill can be a single-roll mill, a multi-roll mill, etc. In the following description, a single-roll mill will be used as an example to illustrate the feedforward control method for rolling force. It is understood that during the rolling process of a single-roll mill, the thickness of the incoming strip may vary at different locations within a steel coil, i.e., there are slight thickness errors. In automatic thickness control, to ensure a constant thickness of the exit strip, the reduction of the rolls needs to be adjusted. This reduction will also change slightly, leading to fluctuations in the rolling force exerted by the rolls on the strip. These fluctuations in rolling force may cause elastic deformation of the rolls, which in turn causes changes in the roll gap, ultimately affecting the strip shape.

[0048] For example, in a rolling mill equipped with a bending roll device, the strip shape is good during stable rolling. However, when the thickness of the incoming material suddenly fluctuates, under the influence of automatic thickness control, in order to ensure a constant exit thickness, the roll reduction needs to be increased, which increases the rolling force of the roll on the strip. This leads to an increase in the elastic deflection and flattening of the roll. If the bending roll force remains unchanged at this time, it may cause edge waviness in the strip.

[0049] Therefore, during the rolling process, since the real-time changes in rolling force affect the strip shape, the adjustment and compensation of rolling force changes play an important role in ensuring the quality of strip shape.

[0050] Based on the above, this application provides a mill rolling force feedforward control method. This method obtains the adjustment ratio coefficient between the rolling force change and the set of various strip shape control measures, determines the compensation unit rolling force change ratio, and the corresponding adjustment amount of the rolling force control measures. Based on the rolling force change and the adjustment ratio coefficient, the feedforward adjustment amount corresponding to the rolling force control measures is determined, thereby enabling compensation for the rolling force change according to the feedforward adjustment amount, avoiding the impact of rolling force fluctuations on strip shape, and improving strip shape quality.

[0051] The following will provide a detailed description of the mill rolling force feedforward control method.

[0052] See Figure 1 This is a flowchart of the mill rolling force feedforward control method according to an embodiment of this application.

[0053] like Figure 1 As shown, according to a first aspect of the embodiments of this application, a mill rolling force feedforward control method is provided, including but not limited to steps S101 to S103:

[0054] Step S101. Obtain the change in rolling force within a preset time period;

[0055] The preset time can be the execution cycle of the feedforward control, such as 10 seconds, 20 seconds, 1 minute, 2 minutes, etc., and is set according to the actual control requirements. No limitation is made here.

[0056] The change in rolling force refers to the change in actual rolling force relative to the target rolling force within a preset time period. It is understood that during the rolling process, each position of the strip may have a corresponding target rolling force. However, due to changes in parameters such as strip thickness, the actual rolling force of the strip may deviate from the target rolling force, resulting in the change in rolling force.

[0057] In some embodiments of step S101, based on the foregoing scheme, obtaining the change in rolling force within a preset time period includes:

[0058] Step S1011. Obtain the actual thickness of each strip steel sampling point measured by the thickness measuring device within a preset time;

[0059] The thickness measuring device can be a thickness gauge, which is located at the front end of the roll gap and measures the actual thickness of the strip at the corresponding sampling point before the strip enters the roll gap.

[0060] Step S1012. Determine each actual rolling force according to the preset correspondence between the actual thickness and the actual rolling force;

[0061] There is a preset correspondence between strip thickness and rolling force, such as a functional relationship, so the corresponding rolling force can be calculated through the function. For example, if the set thickness of the strip at the target sampling point is 1, but the thickness gauge detects that the actual thickness at the target sampling point is 1.1, that is, there is a deviation of 0.1 between the actual thickness and the set thickness, which in turn causes a corresponding deviation between the actual required rolling force and the target rolling force.

[0062] Step S1013. After smoothing each actual rolling force, compare it with each corresponding target rolling force to obtain the rolling force change within a preset time.

[0063] It is understandable that since the strip thickness deviation will be within a certain range, the corresponding actual rolling force should also be within a certain deviation range. If the measured actual rolling force has a large deviation, it indicates that there may be a measurement error. Therefore, before calculating the compensation for the rolling force variation, the actual rolling force needs to be smoothed to reduce the measurement error and avoid excessive rolling force changes during the calculation process. For example, when the difference between the actual rolling force collected at the target sampling point and the target rolling force is greater than a preset range, the actual rolling force needs to be smoothed to eliminate the measurement error.

[0064] Step S102. Obtain the adjustment ratio coefficient between the rolling force change and the strip shape control measure set, wherein the strip shape control measure set includes multiple strip shape control measures, and the multiple strip shape control measures include at least rolling force control measures. The adjustment ratio coefficient is used to characterize the compensation unit rolling force change ratio and the adjustment amount corresponding to the rolling force control measures.

[0065] It should be noted that when controlling the strip shape, in addition to adjusting the rolling force to ensure that the strip shape meets the preset requirements, measures such as strip tension control and roll gap adjustment can also be used to ensure that the strip shape meets the preset requirements. Therefore, the set of shape control measures refers to a collection of multiple shape control measures. It is understandable that when the rolling force is controlled, the strip tension and roll gap will also change due to the change in rolling force. Similarly, when the strip tension is controlled, the rolling force and roll gap will also change due to the change in strip tension; and when the roll gap is controlled, the rolling force and strip tension will also change due to the change in roll gap.

[0066] Therefore, the various strip shape control measures are interconnected and influence each other. When one strip shape control measure is used for feedforward control, the corresponding controlled target will also be affected by that measure and change. Thus, in reality, all strip shape control measures may regulate rolling force changes, but their ability to regulate rolling force changes may differ. For example, rolling force control measures may have the greatest ability to regulate rolling force changes, roll gap control measures have a lower ability, and strip tension control measures have a lower ability to regulate rolling force changes than roll gap control measures. It is understood that the above explanation is only one example; the ability of each strip shape control measure to regulate rolling force changes can be determined by the adjustment residual deviation discussed below, which will not be elaborated upon here.

[0067] It should be noted that the unit rolling force change ratio refers to the ratio of the rolling force change per unit time. It can be understood that the adjustment ratio coefficient is used to characterize the adjustment amount corresponding to the compensation unit rolling force change ratio and the rolling force control measures. Therefore, the total feedforward control amount can be determined based on the adjustment amount corresponding to the ratio of the rolling force change within a preset time to the rolling force change per unit time.

[0068] In some embodiments of step S102, based on the aforementioned scheme, obtaining the adjustment ratio coefficient between the rolling force change and the set of shape control measures includes:

[0069] Step S1021. Obtain the first influence coefficient of the rolling force change on the roll gap, and the second influence coefficient of the strip shape control measures set on the roll gap;

[0070] It should be noted that the first influence coefficient of the rolling force change on the roll gap refers to the influence weight of the rolling force change on the roll gap change when the roll gap changes.

[0071] It should be noted that the second influence coefficient of the plate shape control measures set on the roll gap refers to the influence weight of each plate shape control measure on the roll gap change when the roll gap changes.

[0072] It is understandable that, due to the mutual influence between various shape control measures, the relationship between the controlled target and the shape control measures is not a one-to-one linear one. For example, when the rolling force is controlled, the roll gap and strip tension will also change. Therefore, changes in the roll gap may be caused by changes in the rolling force, strip tension, or active adjustment of the roll gap. Consequently, the second influence coefficient of the set of shape control measures on the roll gap is usually not equal to 1.

[0073] Step S1022. Determine the adjustment ratio coefficient based on the first influence coefficient and the second influence coefficient.

[0074] In some embodiments of step S1022, based on the aforementioned scheme, determining the adjustment ratio coefficient according to the first influence coefficient and the second influence coefficient includes:

[0075] Based on the first influence coefficient and the second influence coefficient, the adjustment ratio coefficient is calculated using the least squares fitting method, as follows:

[0076]

[0077] Wherein, αF represents the adjustment ratio coefficient, n represents the number of discrete units of the strip, i represents the i-th discrete unit among the n discrete units, effp(i) represents the first influence coefficient of the rolling force change on the roll gap, and eff(i) represents the second influence coefficient of the strip shape control measures set on the roll gap.

[0078] It should be noted that, in order to improve the accuracy of numerical calculation, in this embodiment of the application, the strip is discretized along its length to obtain n discrete units. Then, when calculating the adjustment ratio coefficient, the adjustment ratio coefficient can be calculated based on the first influence coefficient and the second influence coefficient corresponding to each discrete unit, thereby making the calculation result more accurate.

[0079] It is understandable that after calculating the adjustment ratio coefficient corresponding to the change in rolling force, the feedforward control quantity of the corresponding rolling force control measure can be calculated based on the magnitude of the change in rolling force (i.e., the amount of change in rolling force).

[0080] Step S103. Determine the feedforward adjustment amount corresponding to the rolling force control measure based on the rolling force change and the adjustment ratio coefficient.

[0081] In some embodiments of step S103, based on the foregoing scheme, the feedforward adjustment amount corresponding to the rolling force control measure is determined based on the following formula:

[0082] ΔF=αF×ΔF R ×g;

[0083] Wherein, ΔF represents the feedforward adjustment amount corresponding to the rolling force control measure, ΔF R This represents the change in rolling force over a preset time period, and g represents the feedforward gain.

[0084] It is understandable that ΔF R It can be the change in rolling force within the feedforward control execution cycle; the feedforward gain can be set according to the response speed required by the rolling mill system.

[0085] Understandably, when there are two or more shape control measures in a rolling mill, it is necessary to compare the compensation capabilities (control capabilities) of different shape control measures for changes in rolling force to determine the priority of each measure. The compensation capability of each shape control measure for changes in rolling force is related not only to the adjustment speed of each measure but also to the similarity between the influence coefficient of each measure and the influence coefficient of the rolling force change. Therefore, the compensation capability of each shape control measure for changes in rolling force can be quantitatively evaluated by adjusting the residual deviation. By calculating the residual deviation of each shape control measure, the priority of each measure can be determined, and thus the order in which they compensate for changes in rolling force can be determined.

[0086] In some embodiments of this application, based on the foregoing scheme, the method further includes:

[0087] Obtain the remaining adjustment deviation of each of the multiple shape control measures other than the rolling force control measure;

[0088] Based on the remaining deviation of each adjustment, the priority of other shape control measures in compensating for changes in rolling force is determined.

[0089] In some embodiments of this application, based on the foregoing scheme, the remaining adjustment deviation is determined using the following formula:

[0090]

[0091] Where rdev represents the adjustment of the remaining deviation, n represents the number of discrete units of the strip, i represents the i-th discrete unit among the n discrete units, effp(i) represents the first influence coefficient of the rolling force change on the roll gap, eff(i) represents the second influence coefficient of the strip shape control measures set on the roll gap, βF represents the adjustment ratio coefficient corresponding to one of the strip shape control measures, and step represents the adjustment step size.

[0092] It should be noted that the adjustment step size can be determined by the adjustment speed of the corresponding plate shape control measure and the feedforward control execution cycle, i.e., step = speed × t, where the adjustment speed of the corresponding plate shape control measure refers to the maximum amount that the plate shape control measure can adjust per unit time.

[0093] It is understandable that if the residual deviation of a certain shape control measure is smaller, it means that the influence coefficient of the shape control measure is more similar to the first influence coefficient of the rolling force change. In this case, the shape control measure has a stronger ability to compensate for the rolling force change. Thus, the control priority of the shape control measure in compensating for the rolling force change can be determined. Therefore, when compensating for the rolling force change, the rolling force can be controlled in sequence according to the priority of each shape control measure.

[0094] Based on the above disclosure, this application embodiment obtains the adjustment ratio coefficient between the rolling force change and the set of various strip shape control measures, determines the compensation unit rolling force change ratio, and the corresponding adjustment amount of the rolling force control measures; based on the rolling force change amount and the adjustment ratio coefficient, it determines the feedforward adjustment amount corresponding to the rolling force control measures, thereby enabling compensation for rolling force changes according to the feedforward adjustment amount, avoiding the impact of rolling force fluctuations on strip shape, actively intervening in strip shape control, improving the accuracy and response speed of strip shape control, and improving strip shape quality.

[0095] The following describes an apparatus embodiment of this application, which can be used to perform the methods described in the above embodiments of this application. For details not disclosed in the apparatus embodiments of this application, please refer to the embodiments of the methods described in the above embodiments of this application.

[0096] See Figure 2 This is a structural diagram of the mill rolling force feedforward control device according to an embodiment of this application.

[0097] like Figure 2 As shown, according to a second aspect of the embodiments of this application, a mill rolling force feedforward control device 200 is provided, comprising:

[0098] The first acquisition unit 201 is used to acquire the change in rolling force within a preset time period;

[0099] The second acquisition unit 202 is used to acquire the adjustment ratio coefficient between the rolling force change and the strip shape control measure set, wherein the strip shape control measure set includes multiple strip shape control measures, and the multiple strip shape control measures include at least rolling force control measures. The adjustment ratio coefficient is used to characterize the compensation unit rolling force change ratio and the adjustment amount corresponding to the rolling force control measures.

[0100] The determining unit 203 is used to determine the feedforward adjustment amount corresponding to the rolling force control measure based on the rolling force change and the adjustment ratio coefficient.

[0101] According to a third aspect of the embodiments of this application, a computer-readable storage medium is provided, the computer-readable storage medium storing at least one computer program instruction, the at least one computer program instruction being loaded and executed by a processor to perform the operation as described in any of the methods in the first aspect.

[0102] Computer-readable storage media may be portable compact disc read-only memory (CD-ROM) and include program code, and may run on a terminal device, such as a personal computer. However, the computer-readable storage medium of this application is not limited thereto. In this application, the readable storage medium may be any tangible medium containing or storing a program that may be used by or in conjunction with an instruction execution system, apparatus, or device.

[0103] A readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of readable storage media include: an electrical connection having one or more wires, a portable disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof.

[0104] Program code for performing the operations of this application can be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java and C++, and conventional procedural programming languages ​​such as C or similar languages. The program code can execute entirely on the user's computing device, partially on the user's device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server. In cases involving remote computing devices, the remote computing device can be connected to the user's computing device via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computing device (e.g., via the Internet using an Internet service provider).

[0105] See Figure 3 This is a schematic diagram of the structure of a computer system suitable for implementing the electronic device of the present application.

[0106] According to a fourth aspect of the present application, an electronic device is provided, including one or more processors and one or more memories, wherein at least one piece of program code is stored in the one or more memories, the at least one piece of program code being loaded and executed by the one or more processors to perform the operations performed as described in any of the methods in the first aspect.

[0107] like Figure 3 As shown, the electronic device 400 is manifested in the form of a general-purpose computing device. The components of the electronic device 400 may include, but are not limited to: at least one processing unit 410, at least one storage unit 420, and a bus 430 connecting different system components (including storage unit 420 and processing unit 410).

[0108] The storage unit stores program code that can be executed by the processing unit 410, causing the processing unit 410 to perform the steps described in the "Embodiment Methods" section above according to various exemplary embodiments of this application.

[0109] Storage unit 420 may include a readable medium in the form of a volatile storage unit, such as random access memory (RAM) 421 and / or cache memory 422, and may further include a read-only memory (ROM) 423.

[0110] Storage unit 420 may also include a program / utility 424 having a set (at least one) of program modules 425, such program modules 425 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment.

[0111] Bus 430 can represent one or more of several types of bus structures, including a memory cell bus or memory cell controller, a peripheral bus, a graphics acceleration port, a processing unit, or a local bus using any of the various bus structures.

[0112] Electronic device 400 can also communicate with one or more external devices 500 (e.g., keyboard, pointing device, Bluetooth device, etc.), one or more devices that enable a user to interact with electronic device 400, and / or any device that enables electronic device 400 to communicate with one or more other computing devices (e.g., router, modem, etc.). This communication can be performed via input / output (I / O) interface 450. Furthermore, electronic device 400 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) via network adapter 460. As shown, network adapter 460 communicates with other modules of electronic device 400 via bus 430. It should be understood that, although not shown in the figures, other hardware and / or software modules can be used in conjunction with electronic device 400, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0113] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and embodiments are within the scope and spirit of this invention and the appended claims. For example, due to the nature of software, the functions described above can be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Furthermore, the functional units can be integrated into a single processing unit, or each unit can exist physically separately, or two or more units can be integrated into a single unit.

[0114] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0115] The units described as separate components may or may not be physically separate. Similarly, the components of the control device may or may not be physical units; they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0116] 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 the present invention, 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 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, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0117] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A method for feedforward control of rolling force in a rolling mill, characterized in that, include: Obtain the change in rolling force within a preset time period; Obtain the adjustment ratio coefficient between the rolling force change and the strip shape control measure set, wherein the strip shape control measure set includes multiple strip shape control measures, and the multiple strip shape control measures include at least rolling force control measures. The adjustment ratio coefficient is used to characterize the compensation unit rolling force change ratio and the adjustment amount corresponding to the rolling force control measures. Based on the change in rolling force and the adjustment ratio coefficient, determine the feedforward adjustment amount corresponding to the rolling force control measure; The adjustment ratio coefficient between the rolling force change and the set of shape control measures includes: Obtain the first influence coefficient of the rolling force change on the roll gap, and the second influence coefficient of the strip shape control measures set on the roll gap; determine the adjustment ratio coefficient based on the first influence coefficient and the second influence coefficient; Determining the adjustment ratio coefficient based on the first influence coefficient and the second influence coefficient includes: Based on the first influence coefficient and the second influence coefficient, the adjustment ratio coefficient is calculated using the least squares fitting method, as follows: ； in, This represents the adjustment ratio coefficient. This indicates the number of discrete units in the strip. express The first discrete unit in the nth discrete unit Discrete units This represents the first influence coefficient of rolling force variation on roll gap. This represents the second influence coefficient of the plate shape control measures set on the roll gap; The feedforward adjustment amount corresponding to the rolling force control measure is determined based on the following formula: ； in, This represents the feedforward adjustment amount corresponding to the rolling force control measure. This indicates the change in rolling force over a preset time period. This represents the feedforward gain.

2. The method according to claim 1, characterized in that, The acquisition of the rolling force change within a preset time period includes: Obtain the actual thickness of each strip steel sampling point measured by the thickness measuring device within a preset time period; Based on the preset correspondence between actual thickness and actual rolling force, determine each actual rolling force; After smoothing each actual rolling force, it is compared with each corresponding target rolling force to obtain the rolling force change within a preset time.

3. The method according to claim 1, characterized in that, The method further includes: Obtain the remaining adjustment deviation of each of the multiple shape control measures other than the rolling force control measure; Based on the remaining deviation of each adjustment, the priority of other shape control measures in compensating for changes in rolling force is determined.

4. The method according to claim 3, characterized in that, The remaining adjustment deviation is determined based on the following formula: ； in, This indicates adjustment of the remaining deviation. This indicates the number of discrete units in the strip. express The first discrete unit in the nth discrete unit Discrete units This represents the first influence coefficient of rolling force variation on roll gap. This represents the second influence coefficient of the set of plate shape control measures on the roll gap. This represents the adjustment ratio coefficient corresponding to one of the plate shape control measures. This indicates the adjustment step size.

5. A rolling mill rolling force feedforward control device, characterized in that, include: The first acquisition unit is used to acquire the change in rolling force within a preset time period; The second acquisition unit is used to acquire the adjustment ratio coefficient between the rolling force change and the strip shape control measure set. The strip shape control measure set includes multiple strip shape control measures, and the multiple strip shape control measures include at least rolling force control measures. The adjustment ratio coefficient is used to characterize the compensation unit rolling force change ratio and the adjustment amount corresponding to the rolling force control measures. The determining unit is used to determine the feedforward adjustment amount corresponding to the rolling force control measure based on the rolling force change and the adjustment ratio coefficient. The adjustment ratio coefficient between the rolling force change and the set of shape control measures includes: Obtain the first influence coefficient of the rolling force change on the roll gap, and the second influence coefficient of the strip shape control measures set on the roll gap; determine the adjustment ratio coefficient based on the first influence coefficient and the second influence coefficient; Determining the adjustment ratio coefficient based on the first influence coefficient and the second influence coefficient includes: Based on the first influence coefficient and the second influence coefficient, the adjustment ratio coefficient is calculated using the least squares fitting method, as follows: ； in, This represents the adjustment ratio coefficient. This indicates the number of discrete units in the strip. express The first discrete unit in the nth discrete unit Discrete units This represents the first influence coefficient of rolling force variation on roll gap. This represents the second influence coefficient of the plate shape control measures set on the roll gap; The feedforward adjustment amount corresponding to the rolling force control measure is determined based on the following formula: ； in, This represents the feedforward adjustment amount corresponding to the rolling force control measure. This indicates the change in rolling force over a preset time period. This represents the feedforward gain.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores at least one computer program instruction, which is loaded and executed by a processor to perform the operation as described in any one of claims 1-4.

7. An electronic device, characterized in that, It includes one or more processors and one or more memories, wherein at least one piece of program code is stored in the one or more memories, and the at least one piece of program code is loaded and executed by the one or more processors to perform the operation performed by the method as described in any one of claims 1-4.

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