Cold rolling processing line inlet loop speed dynamic response control method and system

Abstract

The invention discloses a cold rolling processing line inlet loop speed dynamic response control method and system. The method comprises the steps that S1, the state of an inlet is judged to be a normal operation state or a coil changing state; entering and exiting of the roll changing state are determined based on preset equipment operation parameters and strip steel operation parameter threshold conditions; s2, fitting a distribution rule based on historical operation data of the double-channel uncoiler, obtaining theoretical time of each coil changing stage, and dynamically predicting residual coil changing time by combining with the coil changing stage of the current steel coil; s3, for the uncoiler in normal operation, calculating the residual operation time of the strip steel based on the residual length of the strip steel, the maximum loop amount of the loop and the current actual loop amount; and S4, dynamically calculating and outputting the process section speed and the inlet speed according to the inlet state, the predicted coil changing time or the remaining operation time and by combining loop length limitation and equipment acceleration parameters.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cold rolling control, and particularly relates to a cold rolling treatment line entry loop speed dynamic response control method and system. BACKGROUND

[0002] In a cold rolling treatment line (such as a continuous annealing line, a pickling line, a galvanizing line, etc.), an entry section is usually configured with a double-channel uncoiler and an entry loop for realizing continuous feeding of a steel coil and stable operation of a process section speed. The entry loop stores a certain length of strip steel to realize speed decoupling between the entry equipment and the process section, and plays a buffering and coordinating role in the coil changing, starting and stopping, and speed adjustment process.

[0003] The existing entry speed control mode of the cold rolling treatment line is usually based on one of the following strategies: 1) Taking the target speed of the process section as a reference, the entry speed is adjusted by a simple proportion or feedforward mode; 2) A fixed deceleration curve or an empirical time parameter is used for speed switching in the coil changing process; 3) Only local feedback adjustment is made according to the current loop capacity, and the overall time of the coil changing process is not predicted.

[0004] However, the above control modes generally have the following shortcomings: Large uncertainty of coil changing time: the actual coil changing process is significantly affected by the equipment state, operation rhythm and steel coil parameters, and the use of fixed time or empirical parameters is easy to cause speed adjustment lag or overkill; Low utilization rate of the loop or easy triggering of the limit: in the absence of prediction of the remaining running time and the remaining coil changing time, the entry speed adjustment is often too conservative or aggressive, which easily causes the loop capacity to be exhausted or close to the upper and lower limits; Obvious process speed fluctuation: unreasonable speed response on the entry side directly affects the strip tension stability and product quality; Insufficient coordinated control capability: the existing methods are mostly single-variable control, and cannot realize the coordinated optimization of the entry speed, the loop capacity and the process section speed.

[0005] Therefore, there is an urgent need for a speed dynamic response control method that can comprehensively consider the entry running state, the coil changing process characteristics and the loop constraint conditions, to improve the adaptability of the entry section to the process speed changes, and to enhance the controllability of the coil changing process and the overall stability of the system. SUMMARY

[0006] The present application aims to provide a cold rolling treatment line entry loop speed dynamic response control method and system to stabilize the process speed and realize the coordinated optimization of the process speed, the entry loop and the entry speed.

[0007] To solve the above technical problems, the present invention provides a method for dynamic response control of the looper speed at the entrance of a cold rolling mill, comprising: S1. Determine whether the entry status is normal operation or roll changing; the entry and exit of the roll changing status are determined based on preset equipment operating parameters and strip operating parameter threshold conditions. S2. Based on the historical operating data of the dual-channel uncoiler, fit the distribution pattern to obtain the theoretical time for each coil changing stage, and dynamically predict the remaining coil changing time in combination with the current coil changing stage. S3. For a normally operating uncoiler, calculate the remaining running time of the strip based on the remaining strip length, the maximum looper capacity, and the current actual looper capacity. S4. Based on the entry status, predicted roll change time or remaining running time, combined with looper quantity limits and equipment acceleration parameters, dynamically calculate and output the process section speed and entry speed.

[0008] According to the above scheme, the entry status will switch to the volume switching status when the following two conditions are met: a1) The remaining length of the movable uncoiler is less than the set safe deceleration distance; a2) The inlet speed is reduced to the crawling speed; The entry state switches to normal operation when the following three conditions are met: b1) The tension of the uncoiler is within the effective range; b2) The remaining length of the uncoiler is within the effective range; b3) The inlet velocity is greater than the process section velocity.

[0009] According to the above scheme, the types of the coil changing stage in step S2 include stages corresponding to six landmark events: uncoiling, coil unwinding, lead positioning, lead shearing, lead waiting, and welding completion. The theoretical time for each stage is determined by fitting a normal distribution to historical data and taking the expected value. The remaining coil changing time is the sum of the theoretical time for the unfinished stages of the current coil and is updated in real time as the coil operation progresses.

[0010] According to the above scheme, within any roll-changing stage, the remaining roll-changing time is initialized with the theoretical time of that stage and decreases over time; when entering the next stage, it switches to the theoretical time of the corresponding stage and decreases again; if the remaining roll-changing time decreases to 0 and the next stage is not entered, the remaining roll-changing time is reinitialized to the theoretical time of that stage and decreases again.

[0011] According to the above scheme, the remaining running time in step S3 is expressed as:

[0012] in, For the remaining length of strip steel on the active uncoiler, To maximize the amount of slip rings, To adjust the current actual amount of shares held, For process speed.

[0013] According to the above scheme, in step S4, the process section speed is calculated based on the inlet section acceleration, process speed, expected roll change time, current looper quantity and minimum looper quantity limit, and the process section speed is limited to not exceed the current strip steel process speed limit.

[0014] According to the above scheme, the inlet speed control command includes Scheme A and Scheme B; Scheme A accelerates at the maximum capacity of the equipment, and Scheme B includes three-stage speed control, namely the acceleration zone, the constant speed zone, and the deceleration zone.

[0015] According to the above scheme, when the number of loops at the entrance is less than the set threshold, scheme A is used for looping; when the number of loops at the entrance is greater than or equal to the set threshold, scheme B is used for looping.

[0016] According to the above scheme, the process segment speed is output only when the difference between the calculated process segment speed and the actual process segment speed is greater than the set speed threshold. The process segment speed is output only when the difference between the calculated inlet speed and the actual inlet speed is greater than the set speed threshold.

[0017] The present invention also provides a dynamic response control system for the inlet looper speed of a cold rolling processing line, comprising: The status judgment module is used to determine whether the entry status is normal operation or strip changing; the entry and exit of the strip changing status are determined based on preset equipment operating parameters and strip operating parameter threshold conditions. The remaining coil change time prediction module is used to fit the distribution pattern based on the historical operating data of the dual-channel uncoiler, obtain the theoretical time for each coil change stage, and dynamically predict the remaining coil change time in combination with the current coil change stage. The remaining running time calculation module is used to calculate the remaining running time of the strip for a normally operating uncoiler based on the remaining strip length, the maximum looper capacity, and the current actual looper capacity. The speed dynamic calculation and output module is used to dynamically calculate and output the process section speed and the inlet speed based on the inlet status, predicted roll change time or remaining running time, combined with looper quantity limits and equipment acceleration parameters.

[0018] Beneficial effects This invention accurately determines the normal operation and coil changing states at the entry point, and clarifies that the entry and exit of the coil changing state are based on preset equipment and strip operating parameter thresholds. This ensures accurate identification of the entry point's operating state, providing a targeted logical basis for subsequent speed control and avoiding control malfunctions caused by misjudgments of the state. Based on the historical operating data of the dual-channel uncoiler, the theoretical time for each coil changing stage is obtained, and the remaining coil changing time is dynamically predicted in conjunction with the current coil changing stage. Compared to fixed-time prediction methods, this significantly improves the accuracy and real-time performance of coil changing time prediction, allowing subsequent speed adjustments to closely align with the coil changing progress and avoiding process fluctuations caused by errors in coil changing time estimation. For a normally operating uncoiler, the remaining strip running time is calculated by combining the remaining strip length, the maximum looper capacity, and the current actual looper capacity. This fully considers the looper's buffering capacity, ensuring that the calculated remaining running time matches the actual production scenario and providing a reliable time reference for speed control. Ultimately, by combining the entry status, prediction time, looper quantity limit, and equipment acceleration parameters, the process section speed and entry speed are dynamically calculated and output, achieving coordinated optimization of process section speed, entry looper, and entry speed. This effectively stabilizes the process operating speed, improves the operational stability and reliability of the cold rolling line, and fully utilizes the looper's buffering potential, reducing equipment operating load and energy waste. Attached Figure Description

[0019] Figure 1 This is a flowchart of a dynamic response control method for the inlet looper speed of a cold rolling processing line according to an embodiment of the present invention; Figure 2 This is a comparative diagram of a punching sleeve scheme according to an embodiment of the present invention. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0021] See Figure 1 This embodiment provides a method for dynamic response control of the looper speed at the inlet of a cold rolling mill, including: S1. Determine whether the entry status is normal operation or roll changing; the entry and exit of the roll changing status are determined based on preset equipment operating parameters and strip operating parameter threshold conditions. S2. Based on the historical operating data of the dual-channel uncoiler, fit the distribution pattern to obtain the theoretical time for each coil changing stage, and dynamically predict the remaining coil changing time in combination with the current coil changing stage. S3. For a normally operating uncoiler, calculate the remaining running time of the strip based on the remaining strip length, the maximum looper capacity, and the current actual looper capacity. S4. Based on the entry status, predicted roll change time or remaining running time, combined with looper quantity limits and equipment acceleration parameters, dynamically calculate and output the process section speed and entry speed.

[0022] Furthermore, the entry state switches to the volume-switching state when the following two conditions are met: a1) The remaining length of the movable uncoiler is less than the set safe deceleration distance; a2) The inlet speed is reduced to the crawling speed; The entry state switches to normal operation when the following three conditions are met: b1) The tension of the uncoiler is within the effective range; b2) The remaining length of the uncoiler is within the effective range; b3) The inlet velocity is greater than the process section velocity.

[0023] Furthermore, the types of the coil changing stage in step S2 include stages corresponding to six landmark events: uncoiling, coil unwinding, lead positioning, lead shearing, lead waiting, and welding completion. The theoretical time for each stage is determined by fitting a normal distribution to historical data and taking the expected value. The remaining coil changing time is the sum of the theoretical time for the unfinished stages of the current coil and is updated in real time as the coil operation progresses.

[0024] Specifically, for common dual-channel uncoilers, when one uncoiler is connected to the production line and outputs strip steel, the other uncoiler is in a waiting state. The system monitors the status of the waiting uncoiler. First, it records the historical time taken by the coil during uncoiling, strip conveying, inlet shearing, and welding stages, utilizing the distribution pattern (usually fitted to a normal distribution). Given a reasonable theoretical time (usually considered as) (Mathematical expectation)

[0025] Then, the coil changeover time is predicted by analyzing the different stages the next steel coil is in on the production line. The stage settings can be considered based on the following key events: 1. Does the uncoiler have any rolls? 2. Has the unwinding machine unwound the coil? 3. Is the steel coil head positioned at the double-layer shear? 4. Has the steel coil strip head been completely cut? 5. Has the steel coil head reached the waiting position? 6. Is welding complete? There is a theoretical time for each of the six landmark events mentioned above (the expected time is obtained by fitting a normal distribution to historical data). Combined with the current stage state of the steel coil, the predicted time for the current steel coil is calculated.

[0026] Furthermore, within any roll-changing stage, the remaining roll-changing time is initialized with the theoretical time of that stage and decreases over time; when entering the next stage, it switches to the theoretical time of the corresponding stage and decreases again; if the remaining roll-changing time decreases to 0 and the next stage is not entered, the remaining roll-changing time is reinitialized to the theoretical time of that stage and decreases again.

[0027] Specifically, the following formula means that the predicted time of the waiting window at the entrance of the steel coil is equal to the sum of the theoretical times of the stages not yet reached in the above stages. The superscript of the summation is determined according to the current stage of the steel coil. For example, if the steel coil has been unwound on the uncoiler but has not reached the double shear, then the theoretical times of stages 3 to 6 are added together.

[0028]

[0029] This prediction time is continuously updated as the steel coil moves through the track, and is recalculated when the strip reaches the next stage. The prediction time is composed of the sequential superposition of theoretical prediction times from multiple stages.

[0030] Within any stage i, the system uses the theoretical prediction time of that stage as the initial value and decreases it over time. When the system successfully enters the next stage i+1, the prediction time switches to the theoretical prediction time of stage i+1 and the decreasing process restarts. If the prediction time of the current stage decreases to 0 before entering the next stage, the prediction time is reinitialized to the theoretical prediction time of that stage and the decreasing process restarts.

[0031] Furthermore, in step S3, the remaining running time is expressed as:

[0032] in, For the remaining length of strip steel on the active uncoiler, To maximize the amount of slip rings, To adjust the current actual amount of shares held, For process speed.

[0033] Specifically, for a normally operating uncoiler, its remaining running time is calculated based on the remaining length. It is necessary to consider that the remaining length is divided into two parts: one part is used to fill the inlet loop, with the aim of filling the loop as much as possible when the length is zero; the other part is released through the process section after the loop.

[0034] Furthermore, in step S4, the process section speed is calculated based on the inlet section acceleration, process speed, expected roll change time, current looper quantity and minimum looper quantity limit, and the process section speed is limited to not exceeding the current strip steel process speed limit.

[0035] Specifically, the inlet roll changing stage can be divided into three phases: deceleration and tail-drifting, stopping and waiting, and starting and catching up. Since the first phase is usually controlled by basic automation, the current system's calculations start from the stop. The core of the entire roll changing process is to ensure the speed of the control process section, preventing the inlet roll quantity from falling below the minimum limit. Therefore, the following parameters are defined: Acceleration at the entrance (m / s²), reference value 0.4 m / s² Process acceleration (m / s²) Process speed (m / s) : Estimated time (s) Current looper quantity (m) Minimum limit for looper looper length (m) Calculate the inlet volume used in each stage based on the kinematic formulas: During the roll change process, the amount of sleeve used in the process section is:

[0036] During the initial catch-up phase, the entrance speed increases from 0 to... The number of sets added to the entry point during this period is:

[0037] The total amount of sets consumed is:

[0038] It can be calculated that:

[0039] It can be seen Based on and The change It originates from the prediction algorithm's estimate of the start time. It originates from data collected from basic automation systems.

[0040] At the same time, restrictions were placed on the actual distribution. The current process speed limit for strip steel cannot be exceeded. .

[0041] Furthermore, the inlet speed control command includes scheme A and scheme B; scheme A accelerates at the maximum capacity of the equipment, and scheme B includes three-stage speed control, namely the acceleration zone, the constant speed zone, and the deceleration zone.

[0042] Furthermore, when the number of loops at the entrance is less than the set threshold, scheme A is used for looping; when the number of loops at the entrance is greater than or equal to the set threshold, scheme B is used for looping.

[0043] Furthermore, the process segment speed is output only when the difference between the calculated process segment speed and the actual process segment speed is greater than the set speed threshold; The process segment speed is output only when the difference between the calculated inlet speed and the actual inlet speed is greater than the set speed threshold.

[0044] Specifically, when the inlet is in the normal stage, calculate the maximum process speed and the inlet speed of the punch sleeve in the current stage.

[0045] After the coil is changed and the machine starts running, the system controls the inlet section to gradually increase its speed, exceeding the speed of the process section, and then begins the sleeve filling process. The requirement is that the inlet looper is fully filled when the entire coil has finished running. If the strip is very short at startup and cannot reach the target speed, a uniform acceleration method is used. There are two sleeve filling methods at this stage: Option A involves filling the sleeve at the maximum capacity of the equipment, increasing the inlet looper volume to the maximum process speed in the shortest time, and ensuring the buffer length to handle possible accidents. Option B optimizes the sleeve filling process, prioritizing equipment safety and lifespan, as well as normal unit operation, without rushing to quickly fill the looper. Instead, it ensures the looper is at its maximum volume when the strip is at its tail end. A comparison of Options A and B can be found in [link to relevant documentation]. Figure 2 This system supports flexible switching between two schemes, A and B, which users can switch between ingress algorithms via a switching window on the screen. If scheme A is used, there is no need to control the ingress speed; instead, acceleration is based on the equipment's maximum capacity. If scheme B is used, both the ingress speed and process speed need to be simultaneously controlled. The parameters defined in this embodiment are as follows: Acceleration at the entrance (m / s²), reference value 0.4 m / s² Process acceleration (m / s²) Target velocity at the entrance (m / s) Process speed (m / s) : Estimated time (s) Current looper quantity (m) Minimum limit for looper looper length (m) Maximum limit on the amount of looper loops (m) Remaining strip length (m) on the active uncoiler Regardless of the method used to switch, the first step is to calculate the current... Under normal operating conditions, how long is the ingress expected to remain operational to ensure the loop is just fully filled?

[0046] If scheme B is used for punching, the velocity that the inlet section can maintain needs to be calculated based on the estimated time. According to the geometric method, this process consists of three spliced ​​regions: Acceleration zone: The entry segment starts from 0 with acceleration Upgraded to Use the length of the inlet strip:

[0047] Uniform speed region: Stable operation, using the following inlet strip length:

[0048] Deceleration zone: With acceleration Reduce speed to 0, using the inlet strip length:

[0049] The whole process took Total length of strip steel used

[0050]

[0051] It can be calculated that, after solving the system of equations:

[0052] In obtaining Later update The calculation results are still based on the looper quantity difference, because it is necessary to ensure that the looper quantity input at the inlet is the sum of the looper quantity difference at full looper distance and the looper quantity used in the process section. It can be calculated that:

[0053] After fully considering the stability and smoothness of the unit's operation, the system divides the entire normal winding process into two stages: When the number of loopers at the entrance is less than 60%, use method A to quickly move the looper to the safe area.

[0054] When the amount of looper at the inlet is greater than or equal to 60%, use method B to smoothly push the looper to the full position.

[0055] Since this method controls the unit's operating speed, it is necessary to ensure the safety of the unit equipment at all times. Therefore, the following settings are made: 1. Speed ​​fluctuations generated by calculations need to be filtered. Therefore, the system sets the speed control threshold to 12 m / min. This value means that when the difference between the calculated speed value and the current measured value is less than the threshold, the set value will not be issued. Only when the difference between the set value and the actual value is greater than or equal to the threshold will the set value be issued, ensuring that the unit's operating speed does not fluctuate, thereby protecting the stable operating condition of the equipment.

[0056] 2. The issuance of process section speeds requires manual confirmation. Since the process section speed is the highest priority control across the entire line, its control must ensure sufficient safety and reliability. During roll changing or sleeve punching, if the system detects a need to reduce the process section speed, it will not immediately control the unit. Instead, it will display the system's estimated data on the main control page and provide control buttons for the shift operator to determine whether to issue the speed control. Fully automatic system control will only occur when the shift has maximized system control authority and all system functions are fully enabled by default.

[0057] This embodiment also provides a dynamic response control system for the looper speed at the entrance of a cold rolling processing line, including: The status judgment module is used to determine whether the entry status is normal operation or strip changing; the entry and exit of the strip changing status are determined based on preset equipment operating parameters and strip operating parameter threshold conditions. The remaining coil change time prediction module is used to fit the distribution pattern based on the historical operating data of the dual-channel uncoiler, obtain the theoretical time for each coil change stage, and dynamically predict the remaining coil change time in combination with the current coil change stage. The remaining running time calculation module is used to calculate the remaining running time of the strip for a normally operating uncoiler based on the remaining strip length, the maximum looper capacity, and the current actual looper capacity. The speed dynamic calculation and output module is used to dynamically calculate and output the process section speed and the inlet speed based on the inlet status, predicted roll change time or remaining running time, combined with looper quantity limits and equipment acceleration parameters.

[0058] Taking a pickling unit in a large steel plant as an example, before applying this method, the speed optimization model's prediction of coil change at the inlet was too mechanical, using a constant prediction time, resulting in overly conservative control of the looper, which did not align with the operator's intentions, thus leading to low usage. After applying this method, the inlet prediction is more flexible, and the usage rate is high. Currently, the overall speed optimization model can bring about a 3% increase in output and reduce the workload of personnel at the unit's inlet.

[0059] It should be noted that, depending on the implementation needs, the various steps / components described in this application can be broken down into more steps / components, or two or more steps / components or parts of the operation of steps / components can be combined into new steps / components to achieve the purpose of this invention.

[0060] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for dynamic response control of the looper speed at the inlet of a cold rolling mill, characterized in that, include: S1. Determine whether the entry status is normal operation or roll changing; the entry and exit of the roll changing status are determined based on preset equipment operating parameters and strip operating parameter threshold conditions. S2. Based on the historical operating data of the dual-channel uncoiler, fit the distribution pattern to obtain the theoretical time for each coil changing stage, and dynamically predict the remaining coil changing time in combination with the current coil changing stage. S3. For a normally operating uncoiler, calculate the remaining running time of the strip based on the remaining strip length, the maximum looper capacity, and the current actual looper capacity. S4. Based on the entry status, predicted roll change time or remaining running time, combined with looper quantity limits and equipment acceleration parameters, dynamically calculate and output the process section speed and entry speed.

2. The dynamic response control method for the inlet looper speed of the cold rolling processing line according to claim 1, characterized in that, The entry state switches to the volume switching state when the following two conditions are met: a1) The remaining length of the movable uncoiler is less than the set safe deceleration distance; a2) The inlet speed is reduced to the crawling speed; The entry state switches to normal operation when the following three conditions are met: b1) The tension of the uncoiler is within the effective range; b2) The remaining length of the uncoiler is within the effective range; b3) The inlet velocity is greater than the process section velocity.

3. The dynamic response control method for the inlet looper speed of a cold rolling mill as described in claim 1, characterized in that, The types of the coil changing stage in step S2 include stages corresponding to six landmark events: uncoiling, coil unwinding, lead positioning, lead shearing, lead waiting, and welding completion. The theoretical time for each stage is determined by fitting a normal distribution to historical data and taking the expected value. The remaining coil changing time is the sum of the theoretical time for the unfinished stages of the current coil and is updated in real time as the coil operation progresses.

4. The dynamic response control method for the inlet looper speed of a cold rolling mill according to claim 3, characterized in that, Within any roll-changing stage, the remaining roll-changing time is initialized with the theoretical time of that stage and decreases over time; when entering the next stage, it switches to the theoretical time of the corresponding stage and decreases again; if the remaining roll-changing time decreases to 0 and the next stage is not entered, the remaining roll-changing time is reinitialized to the theoretical time of that stage and decreases again.

5. The dynamic response control method for the inlet looper speed of a cold rolling mill according to claim 1, characterized in that, In step S3, the remaining running time is expressed as: in, For the remaining length of strip steel on the active uncoiler, To maximize the amount of slip rings, To adjust the current actual amount of shares held, For process speed.

6. The dynamic response control method for the inlet looper speed of a cold rolling mill according to claim 1, characterized in that, In step S4, the process section speed is calculated based on the inlet section acceleration, process speed, expected roll change time, current looper quantity and minimum looper quantity limit, and the process section speed is limited to not exceed the current strip steel process speed limit.

7. The dynamic response control method for the inlet looper speed of a cold rolling mill according to claim 1, characterized in that, The inlet speed control command includes scheme A and scheme B; scheme A accelerates at the maximum capacity of the equipment, while scheme B includes three-stage speed control, namely the acceleration zone, the constant speed zone, and the deceleration zone.

8. The dynamic response control method for the inlet looper speed of a cold rolling mill according to claim 7, characterized in that, When the number of loops at the entrance is less than the set threshold, scheme A is used to flush the loop; when the number of loops at the entrance is greater than or equal to the set threshold, scheme B is used to flush the loop.

9. The dynamic response control method for the inlet looper speed of a cold rolling mill according to claim 7, characterized in that, The process segment speed is output only when the difference between the calculated process segment speed and the actual process segment speed is greater than the set speed threshold. The process segment speed is output only when the difference between the calculated inlet speed and the actual inlet speed is greater than the set speed threshold.

10. A dynamic response control system for the inlet looper speed of a cold rolling mill, characterized in that, include: The status judgment module is used to determine whether the entry status is normal operation or strip changing; the entry and exit of the strip changing status are determined based on preset equipment operating parameters and strip operating parameter threshold conditions. The remaining coil change time prediction module is used to fit the distribution pattern based on the historical operating data of the dual-channel uncoiler, obtain the theoretical time for each coil change stage, and dynamically predict the remaining coil change time in combination with the current coil change stage. The remaining running time calculation module is used to calculate the remaining running time of the strip for a normally operating uncoiler based on the remaining strip length, the maximum looper capacity, and the current actual looper capacity. The speed dynamic calculation and output module is used to dynamically calculate and output the process section speed and the inlet speed based on the inlet status, predicted roll change time or remaining running time, combined with looper quantity limits and equipment acceleration parameters.

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