Method and system for controlling fine adjustment return of moisture removal air door of cut tobacco dryer
By directly controlling the opening of the dehumidification damper of the tobacco drying machine and using a proportional-integral algorithm, the problem of lag in the moisture regulation of tobacco shreds at the outlet of the tobacco drying machine was solved, thereby improving the stability and efficiency of tobacco drying quality.
Patent Information
- Application Number
- CN202610229043.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-26
- Publication Date
- 2026-05-19
AI Technical Summary
In existing technologies, the moisture control at the tobacco outlet of the tobacco drying machine is lagging and cannot be adjusted in a timely manner, resulting in unstable tobacco drying quality.
By directly controlling the opening of the dehumidification damper of the tobacco drying machine, and using proportional control and proportional-integral control algorithms, the damper opening is adjusted according to the moisture error at the tobacco outlet, thereby achieving timely regulation of the moisture content at the tobacco outlet.
It can quickly eliminate moisture fluctuations at the tobacco outlet, ensure the quality of tobacco drying, improve drying efficiency, and restore the tobacco to its optimal working state when in a steady state.
Smart Images
Figure CN122056403A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of tobacco drum drying machine control technology, and in particular to a method and system for fine-tuning and returning the dehumidification damper of the drying machine to its original position. Background Technology
[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.
[0003] During the production process, tobacco shreds need to be dried using a drum-type tobacco dryer. By monitoring the moisture content at the outlet of the dryer and controlling it to a target level, the tobacco shreds are dried to the target state to ensure consistent flavor. When the moisture content and temperature of the tobacco shreds entering the dryer fluctuate, the moisture content at the outlet of the dryer will also fluctuate.
[0004] In related technologies, the moisture content of tobacco shreds at the outlet of the drying machine is controlled to the target state by adjusting the cylinder wall temperature, hot air temperature, hot air volume distribution, and the opening of the dehumidification damper. However, this control method itself has a large lag and cannot achieve timely regulation of the moisture content at the outlet of the drying machine, thus failing to guarantee the drying quality of the tobacco shreds. Summary of the Invention
[0005] To address the aforementioned problems, this invention proposes a method and system for fine-tuning and returning the dehumidification damper of a tobacco drying machine. By directly controlling the dehumidification damper of the tobacco drying machine, the timeliness of moisture regulation at the tobacco outlet of the drying machine is improved, thereby ensuring the drying quality of the tobacco.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: Firstly, a method for fine-tuning and returning the dehumidification damper of a yarn drying machine is proposed, including: Obtain the moisture content of the tobacco shreds at the outlet of the tobacco drying machine; When the moisture content of the tobacco shreds at the outlet of the tobacco drying machine is greater than the set outlet moisture value, calculate the error between the moisture content of the tobacco shreds at the outlet of the tobacco drying machine and the set outlet moisture value. When the error between the moisture value at the tobacco outlet of the tobacco drying machine and the set moisture value is greater than the set error threshold, the opening adjustment amount of the tobacco drying machine's exhaust damper is calculated and determined based on the error between the moisture value at the tobacco outlet of the tobacco drying machine and the set moisture value. Determine the target opening of the dehumidification damper of the drying machine based on the adjustment amount of the opening of the dehumidification damper; The opening of the dehumidification damper of the drying machine is controlled according to the target opening of the damper. When the error between the moisture content at the tobacco outlet of the tobacco drying machine and the set moisture content is less than or equal to the set error threshold, the opening of the tobacco drying machine's exhaust damper is controlled to remain at the basic opening.
[0007] Furthermore, a proportional control algorithm is used to calculate and determine the adjustment amount of the opening of the dehumidification damper of the filament drying machine.
[0008] Furthermore, when the opening adjustment amount of the dehumidification damper of the filament drying machine is determined by the proportional control algorithm, the target opening of the dehumidification damper of the filament drying machine is equal to the sum of the opening adjustment amount of the dehumidification damper of the filament drying machine and the basic opening.
[0009] Furthermore, a proportional-integral control algorithm is used to calculate and determine the adjustment amount of the opening of the dehumidification damper of the filament drying machine.
[0010] Furthermore, when the opening adjustment amount of the drying machine's exhaust damper is determined by the proportional-integral control algorithm, the target opening of the drying machine's exhaust damper is equal to the sum of the opening adjustment amount of the drying machine's exhaust damper and the target opening at the previous moment.
[0011] Furthermore, when the opening adjustment of the dehumidification damper of the tobacco drying machine is determined by the proportional-integral control algorithm, and when the error between the moisture value at the tobacco outlet of the tobacco drying machine and the set moisture value at the outlet is less than or equal to the set error threshold, the target opening at the previous moment is set as the base opening.
[0012] Secondly, a fine-tuning and return control system for the dehumidification damper of the yarn drying machine is proposed, including: The outlet moisture value acquisition unit is used to acquire the outlet moisture value of tobacco shreds from the tobacco drying machine. The outlet moisture deviation calculation unit is used to calculate the error between the outlet moisture value of the tobacco shreds in the drying machine and the outlet moisture setting value when the outlet moisture value is greater than the outlet moisture setting value. The opening adjustment amount determination unit is used to calculate and determine the opening adjustment amount of the drying machine's exhaust damper based on the error between the moisture value at the tobacco outlet of the drying machine and the set moisture value at the outlet when the error between the two values is greater than the set error threshold. The target opening calculation unit is used to determine the target opening of the drying machine's exhaust damper based on the opening adjustment amount of the drying machine's exhaust damper. The damper opening control unit is used to control the opening of the damper of the tobacco drying machine according to the target opening of the damper. When the error between the moisture value at the tobacco outlet of the tobacco drying machine and the set moisture value is less than or equal to the set error threshold, the opening of the damper of the tobacco drying machine is controlled to be maintained at the basic opening.
[0013] Thirdly, a computer device is proposed, the device comprising: A processor, adapted to execute computer programs; A computer-readable storage medium storing a computer program, which, when executed by the processor, implements the fine-tuning return control method for the dehumidification damper of the filament drying machine proposed in the first aspect.
[0014] Fourthly, a computer-readable storage medium is proposed, which stores a computer program adapted to be loaded by a processor and executed by the fine-tuning return control method for the dehumidification damper of the filament drying machine proposed in the first aspect.
[0015] Fifthly, a computer program product is proposed, which includes a computer program. When the computer program is executed by a processor, it implements the fine-tuning return control method for the dehumidification damper of the drying machine proposed in the first aspect.
[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention proposes a method and system for fine-tuning and returning the dehumidification damper of a tobacco drying machine. When the moisture content at the tobacco outlet of the drying machine is detected to be greater than the set moisture content, and when the error between the moisture content and the set moisture content exceeds a set error threshold, the method determines the adjustment amount of the opening of the dehumidification damper based on this error. The method then controls the dehumidification damper according to this adjustment, allowing excess moisture generated during the tobacco drying process to be discharged through the damper, improving the drying efficiency and rapidly reducing the moisture content at the tobacco outlet to the set moisture content. This quickly eliminates moisture fluctuations caused by upstream material (tobacco) moisture or temperature fluctuations, ensuring the quality of tobacco drying. Conversely, when the error between the moisture content and the set moisture content is less than or equal to the set error threshold, the method controls the opening of the dehumidification damper to return to its original, preset optimal operating state.
[0017] Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.
[0019] Figure 1 This is a flowchart of the fine-tuning and return control method for the dehumidification damper of the filament drying machine proposed in an embodiment of the present invention; Figure 2 This is a schematic diagram showing the location of the damper of the wire drying machine in an embodiment of the present invention.
[0020] Among them: 1. Dehumidification damper, 2. Hot air volume distribution damper. Detailed Implementation
[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0022] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.
[0023] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0024] Where there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.
[0025] The method for fine-tuning and returning the dehumidification damper of the tobacco drying machine proposed in this embodiment of the invention is applied to the application scenario of controlling the moisture content at the tobacco outlet of the tobacco drying machine.
[0026] A tobacco drying machine is used to dry tobacco shreds, such as... Figure 2 As shown, the tobacco drying machine is equipped with a tobacco outlet, a dehumidification damper 1, and a hot air source. The hot air source introduces hot air into the drying machine through a hot air duct to dry the tobacco. During the drying process, moisture is discharged through the dehumidification damper, and the dried tobacco is discharged through the tobacco outlet. Therefore, by monitoring the moisture content at the tobacco outlet, it can be determined whether the tobacco has been dried to the required level. In the current technology, in order to control the moisture content at the tobacco outlet, a hot air volume distribution damper 2 is installed on the hot air duct. The moisture content at the tobacco outlet is adjusted by adjusting the hot air volume distribution damper 2. However, the control itself has a large lag and is only suitable for controlling the tobacco when the moisture content of the incoming material fluctuates within a small range and changes slowly. When the moisture content and temperature of the tobacco entering the drying machine fluctuate significantly, it is impossible to control the moisture content at the tobacco outlet of the drying machine in a timely manner, thus failing to guarantee the drying quality of the tobacco.
[0027] To achieve timely control of the moisture content at the tobacco shred outlet and ensure the drying quality of the tobacco shreds, this invention proposes a fine-tuning and return control method for the exhaust damper of the tobacco drying machine. When the moisture content at the tobacco shred outlet of the tobacco drying machine fluctuates, the opening of the exhaust damper is adjusted to promptly control the moisture content at the tobacco shred outlet, quickly reducing the moisture content at the tobacco shred outlet to the set value. This rapidly eliminates the fluctuations in outlet moisture content caused by upstream material (tobacco shreds) moisture or temperature fluctuations, thus ensuring the drying quality of the tobacco shreds.
[0028] The micro-adjustment return control method for the dehumidification damper of the yarn drying machine proposed in this embodiment of the invention, such as... Figure 1 As shown, it includes: Obtain the moisture content of the tobacco shreds at the outlet of the tobacco drying machine; When the moisture content of the tobacco shreds at the outlet of the tobacco drying machine is greater than the set outlet moisture value, calculate the error between the moisture content of the tobacco shreds at the outlet of the tobacco drying machine and the set outlet moisture value. When the error between the moisture value at the tobacco outlet of the tobacco drying machine and the set moisture value is greater than the set error threshold, the opening adjustment amount of the tobacco drying machine's exhaust damper is calculated and determined based on the error between the moisture value at the tobacco outlet of the tobacco drying machine and the set moisture value. Determine the target opening of the dehumidification damper of the drying machine based on the adjustment amount of the opening of the dehumidification damper; The opening of the dehumidification damper of the drying machine is controlled according to the target opening of the damper. When the error between the moisture content at the tobacco outlet of the tobacco drying machine and the set moisture content is less than or equal to the set error threshold, the opening of the tobacco drying machine's exhaust damper is controlled to remain at the basic opening.
[0029] In this embodiment of the invention, a moisture meter is installed at the tobacco outlet of the tobacco drying machine, and the moisture value PV at the tobacco outlet is obtained by detecting the moisture value using the moisture meter.
[0030] When the moisture content PV at the tobacco outlet of the tobacco drying machine is greater than the set moisture content SP, the error between the moisture content at the tobacco outlet of the tobacco drying machine and the set moisture content is Error = PV - SP.
[0031] When the error Error is greater than the set error threshold, it indicates that the moisture value of the tobacco shreds outlet has deviated from the set moisture value by a large distance. Based on the error Error, the proportional (P) control algorithm is used to calculate and determine the opening adjustment amount ΔDoor of the drying machine's exhaust damper.
[0032] Alternatively, based on the error Error, a proportional-integral (PI) control algorithm can be used to calculate and determine the opening adjustment amount ΔDoor of the dehumidification damper of the filament drying machine.
[0033] Then, based on the opening adjustment amount ΔDoor, the target opening degree Door_New of the drying machine's dehumidification damper is determined.
[0034] The exhaust damper actuator activates, increasing the opening by ΔDoor. This increased opening leads to more humid air being discharged from the drying cylinder per unit time, carrying away more moisture and effectively "pulling back" the elevated tobacco moisture content to near the set moisture value.
[0035] After a period of time, when the error between the moisture value at the tobacco outlet of the tobacco drying machine and the set moisture value is less than or equal to the set error threshold, it indicates that the moisture value at the tobacco outlet has stabilized again near the set moisture value and the error is close to zero. At this time, the opening of the exhaust damper of the tobacco drying machine is restored to the basic opening degree Door_Base.
[0036] When the error approaches zero, the calculated adjustment ΔDoor also becomes zero because the error disappears. The controller then restores the opening of the exhaust damper to its original base opening: Door_Final = Door_Base + 0 = Door_Base.
[0037] The system returned to steady-state operation, but the exhaust damper had already been reset, ready to deal with the next disturbance.
[0038] The purpose of returning the exhaust damper to its base position is to ensure overall thermal efficiency and production rhythm, since the base opening (Door_Base) of the exhaust damper is an optimized parameter for rated operating conditions. While prolonged use of an increased damper opening can control moisture, it may lead to increased energy consumption (due to more hot air being exhausted) and loss of tobacco aroma, among other side effects. Therefore, restoring the exhaust damper opening to its base position after the disturbance is eliminated ensures the dryer operates at its optimal state.
[0039] In some embodiments, when the opening adjustment amount of the dehumidification damper of the filament drying machine is determined by a proportional control algorithm, the target opening of the dehumidification damper of the filament drying machine is equal to the sum of the opening adjustment amount of the dehumidification damper of the filament drying machine and the basic opening.
[0040] Where ΔDoor(t) = Kp e(t) ΔDoor(t): The opening adjustment amount (%) of the dehumidification damper of the drying machine at time t.
[0041] Kp: Proportional gain (or proportional coefficient). This is a key parameter that requires on-site debugging. The larger the Kp, the stronger the regulation effect, but it may also cause system oscillation.
[0042] e(t): The error between the moisture content of the tobacco shreds at the outlet of the drying machine at time t and the set moisture content at the outlet, e(t) = PV(t) - SP(t).
[0043] PV(t): Moisture content (%) at the tobacco shred outlet of the drying machine at time t.
[0044] SP(t): The setpoint (%) for the moisture content of tobacco shreds at the outlet of the tobacco drying machine at time t.
[0045] Formula for calculating the target opening of the dehumidification damper of the yarn drying machine: Door_Output(t) = Door_Base + ΔDoor(t) Door_Output(t): The target opening degree (%) that the controller finally outputs to the damper actuator.
[0046] Door_Base: The default base opening (%) of the exhaust damper when no adjustment is required.
[0047] When the error is less than or equal to the set error threshold, the moisture content of the tobacco outlet tends to stabilize, e(t) ≈ 0, ΔDoor(t) ≈ 0, therefore Door_Output(t) ≈ Door_Base, thus achieving automatic return.
[0048] To achieve better control, an integral (I) term is usually added to eliminate the residual deviation (static error) that may exist in pure proportional control. When the opening adjustment of the drying machine's exhaust damper is determined by the proportional-integral control algorithm, the target opening of the drying machine's exhaust damper is equal to the sum of the opening adjustment of the drying machine's exhaust damper and the target opening at the previous moment. When the opening adjustment of the dehumidification damper of the tobacco drying machine is determined by the proportional-integral control algorithm, and the error between the moisture value at the tobacco outlet of the tobacco drying machine and the set moisture value at the outlet is less than or equal to the set error threshold, the target opening at the previous moment is set as the base opening.
[0049] Specifically: Using a proportional-integral (PI) control algorithm, the formula for calculating the adjustment amount ΔDoor of the dehumidification damper in the yarn drying machine is as follows: ΔDoor(t) = Kp [e(t) + (1 / Ti) ∫e(τ)dτ] In the formula, Ti represents the integration time, which is a parameter that needs to be adjusted. The smaller Ti is, the stronger the integration effect and the faster the steady-state error is eliminated, but it may also cause system instability.
[0050] ∫e(τ)dτ: The historical cumulative value of error from the occurrence of Error to the current time t; In practical computational control, integration is achieved through accumulation. It is calculated once per control cycle (e.g., 1 second): ΔDoor(n) = Kp e(n) + (Kp Δt / Ti) Σ[e(i)] n: The current nth control cycle.
[0051] Δt: Duration of the control cycle.
[0052] Σ[e(i)]: The sum of all historical errors from i=1 to i=n.
[0053] Formula for calculating the target opening of the dehumidification damper of the yarn drying machine: Door_Output(n) = Door_Base + ΔDoor(n) Similarly, when the error is less than or equal to the set error threshold, the moisture content at the tobacco outlet tends to stabilize, e(t) ≈ 0 and Σ[e(i)] no longer increases, so ΔDoor(n) remains a constant. However, note that this constant is necessary to counteract the persistent, fixed disturbance (such as a permanent increase in the moisture content of the incoming material). If the disturbance is temporary, the integral term will stop accumulating as the deviation returns to zero, but it will not automatically return to zero, which would prevent the damper from resetting.
[0054] Therefore, in order to achieve "returning to the original basic opening", the standard PI algorithm can be modified in the following two ways: (1) Setpoint Reset: After the system stabilizes, manually or automatically update Door_Base to the current Door_Output(n) and reset the integral term to zero. This is equivalent to changing the system's base operating point.
[0055] (2) Incremental PI + bumpless switching: This is a more advanced and common approach. The controller does not directly calculate the absolute output, but rather the change in output. When a reset is required, control can be smoothly returned to the base opening.
[0056] PI controller output: ΔDoor(n) = Kp [e(n) - e(n-1)] + (Kp Δt / Ti) e(n) Door_Output(n) = Door_Output(n-1) + ΔDoor(n) When switched to "automatic" mode, Door_Output(n-1) is the target opening degree of the drying machine's exhaust damper at the previous moment.
[0057] Door_Output(n-1) is set to Door_Base to achieve seamless switching and eventual reset.
[0058] The method for fine-tuning and returning the dehumidification damper of a tobacco drying machine proposed in this invention employs closed-loop negative feedback control based on the moisture content at the tobacco outlet. By fine-tuning the opening of the dehumidification damper, the amount of moisture discharged is altered, thereby offsetting the impact of fluctuations in the moisture content or temperature of the inlet tobacco on the moisture content at the outlet. Upon successful control, the temporary intervention is revoked, the basic opening of the dehumidification damper is restored, and the disturbance is quickly quelled using the most direct means. The system then returns to the optimal steady-state operating point to maximize overall efficiency.
[0059] This invention also proposes a fine-tuning return control system for the dehumidification damper of a yarn drying machine, comprising: The outlet moisture value acquisition unit is used to acquire the outlet moisture value of tobacco shreds from the tobacco drying machine. The outlet moisture deviation calculation unit is used to calculate the error between the outlet moisture value of the tobacco shreds in the drying machine and the outlet moisture setting value when the outlet moisture value is greater than the outlet moisture setting value. The opening adjustment amount determination unit is used to calculate and determine the opening adjustment amount of the drying machine's exhaust damper based on the error between the moisture value at the tobacco outlet of the drying machine and the set moisture value at the outlet when the error between the two values is greater than the set error threshold. The target opening calculation unit is used to determine the target opening of the drying machine's exhaust damper based on the opening adjustment amount of the drying machine's exhaust damper. The damper opening control unit is used to control the opening of the damper of the tobacco drying machine according to the target opening of the damper. When the error between the moisture value at the tobacco outlet of the tobacco drying machine and the set moisture value is less than or equal to the set error threshold, the opening of the damper of the tobacco drying machine is controlled to be maintained at the basic opening.
[0060] It should be noted that the above-described embodiment of the filament drying machine dehumidification damper fine-tuning return control system is only an example of the above-described functional module division when controlling the filament drying machine dehumidification damper. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the equipment can be divided into different functional modules to complete all or part of the functions described above. In addition, the above-described embodiment of the filament drying machine dehumidification damper fine-tuning return control system and the embodiment of the filament drying machine dehumidification damper fine-tuning return control method belong to the same concept, and the specific implementation process is detailed in the method embodiment, which will not be repeated here.
[0061] The present invention also discloses a computer device, the device comprising: A processor, adapted to execute computer programs; A computer-readable storage medium storing a computer program, which, when executed by the processor, implements the fine-tuning return control method for the dehumidification damper of the filament drying machine disclosed in the embodiments of the present invention.
[0062] The computer device can be a portable mobile terminal, such as a smartphone, tablet, laptop, or desktop computer. Typically, a computer device includes a processor and memory.
[0063] The present invention also discloses a computer-readable storage medium storing a computer program adapted for loading by a processor and executing the fine-tuning return control method for the dehumidification damper of a filament drying machine disclosed in the embodiments of the present invention.
[0064] The present invention also discloses a computer program product, which includes a computer program. When the computer program is executed by a processor, it implements the fine-tuning return control method for the dehumidification damper of the filament drying machine disclosed in the embodiments of the present invention.
[0065] The method disclosed in this invention can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules within the processor. The software modules can reside in readily available storage media in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or registers. This storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method. To avoid repetition, detailed descriptions are omitted here.
[0066] Those skilled in the art will recognize that the units and algorithm steps described in conjunction with the embodiments 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 implementation should not be considered beyond the scope of this application.
[0067] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.
Claims
1. A method for fine-tuning and returning the dehumidification damper of a filament drying machine, characterized in that, include: Obtain the moisture content of the tobacco shreds at the outlet of the tobacco drying machine; When the moisture content of the tobacco shreds at the outlet of the tobacco drying machine is greater than the set outlet moisture value, calculate the error between the moisture content of the tobacco shreds at the outlet of the tobacco drying machine and the set outlet moisture value. When the error between the moisture value at the tobacco outlet of the tobacco drying machine and the set moisture value is greater than the set error threshold, the opening adjustment amount of the tobacco drying machine's exhaust damper is calculated and determined based on the error between the moisture value at the tobacco outlet of the tobacco drying machine and the set moisture value. Determine the target opening of the dehumidification damper of the drying machine based on the adjustment amount of the opening of the dehumidification damper; The opening of the dehumidification damper of the drying machine is controlled according to the target opening of the damper. When the error between the moisture content at the tobacco outlet of the tobacco drying machine and the set moisture content is less than or equal to the set error threshold, the opening of the tobacco drying machine's exhaust damper is controlled to remain at the basic opening.
2. The method for fine-tuning and returning the dehumidification damper of a filament drying machine as described in claim 1, characterized in that, A proportional control algorithm is used to calculate and determine the adjustment amount of the opening of the dehumidification damper of the filament drying machine.
3. The method for fine-tuning and returning the dehumidification damper of the filament drying machine as described in claim 2, characterized in that, When the opening adjustment amount of the dehumidification damper of the filament drying machine is determined by the proportional control algorithm, the target opening of the dehumidification damper of the filament drying machine is equal to the sum of the opening adjustment amount of the dehumidification damper of the filament drying machine and the basic opening.
4. The method for fine-tuning and returning the dehumidification damper of a filament drying machine as described in claim 1, characterized in that, The proportional-integral control algorithm is used to calculate and determine the opening adjustment amount of the dehumidification damper of the filament drying machine.
5. The method for fine-tuning and returning the dehumidification damper of a filament drying machine as described in claim 4, characterized in that, When the opening adjustment amount of the dehumidification damper of the filament drying machine is determined by the proportional-integral control algorithm, the target opening of the dehumidification damper of the filament drying machine is equal to the sum of the opening adjustment amount of the dehumidification damper of the filament drying machine and the target opening at the previous moment.
6. The method for fine-tuning and returning the dehumidification damper of a filament drying machine as described in claim 4, characterized in that, When the opening adjustment of the dehumidification damper of the tobacco drying machine is determined by the proportional-integral control algorithm, and the error between the moisture value at the tobacco outlet of the tobacco drying machine and the set moisture value at the outlet is less than or equal to the set error threshold, the target opening at the previous moment is set as the base opening.
7. A fine-tuning and return control system for the dehumidification damper of a filament drying machine, characterized in that, include: The outlet moisture value acquisition unit is used to acquire the outlet moisture value of tobacco shreds from the tobacco drying machine. The outlet moisture deviation calculation unit is used to calculate the error between the outlet moisture value of the tobacco shreds in the drying machine and the outlet moisture setting value when the outlet moisture value is greater than the outlet moisture setting value. The opening adjustment amount determination unit is used to calculate and determine the opening adjustment amount of the drying machine's exhaust damper based on the error between the moisture value at the tobacco outlet of the drying machine and the set moisture value at the outlet when the error between the two values is greater than the set error threshold. The target opening calculation unit is used to determine the target opening of the drying machine's exhaust damper based on the opening adjustment amount of the drying machine's exhaust damper. The damper opening control unit is used to control the opening of the damper of the tobacco drying machine according to the target opening of the damper. When the error between the moisture value at the tobacco outlet of the tobacco drying machine and the set moisture value is less than or equal to the set error threshold, the opening of the damper of the tobacco drying machine is controlled to be maintained at the basic opening.
8. An electronic device, characterized in that, The device includes: A processor, adapted to execute computer programs; A computer-readable storage medium storing a computer program, which, when executed by the processor, implements the fine-tuning return control method for the dehumidification damper of a filament drying machine as described in any one of claims 1-6.
9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program adapted to be loaded by a processor and executed by the fine-tuning return control method for the dehumidification damper of the filament drying machine according to any one of claims 1-6.
10. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the fine-tuning return control method for the dehumidification damper of the filament drying machine as described in any one of claims 1-6.