A half cosine type fastest tracking differential method, system and terminal device
By employing the half-cosine type fastest tracking differential method and utilizing combined operations to improve the tracking efficiency of the differentiator, the problem of low differential efficiency of the main steam temperature process signal in thermal power units was solved, thereby enhancing control performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-04-12
- Publication Date
- 2026-03-24
AI Technical Summary
In the control process of thermal power units, the commonly used differentiators have low efficiency, especially in the differential control of the main steam temperature process signal, which affects the control performance.
The one-half cosine type fastest tracking differential method is adopted. Through the combination of a first subtractor, a second subtractor, an adder, a first integrator, a second integrator, and a delayer, the subtraction, integration, addition, and delay operations of the input signal are realized, and finally the one-half cosine type fastest tracking differential signal is obtained.
It improves the tracking efficiency of the differentiator, enhances the differential tracking capability of process signals in thermal power units, and improves the control performance of the main steam temperature process.
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Figure CN116224805B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of industrial process control, and in particular to a half-cosine type fastest tracking differential method, system and terminal device. BACKGROUND
[0002] In the field of industrial process control, it is of great importance to obtain the differential signal of the process response, for example, to provide a differential control signal in a control loop.
[0003] An ideal differentiator is physically unachievable, and a common differentiator is generally used, which is a tracking differentiator based on a first order inertial filter (FOIF). However, the FOIF is a typical exponential tracking filter, and mainly has the problem of low efficiency in output tracking input. Therefore, the common differentiator also has the problem of low efficiency in output tracking input.
[0004] For example, in the control process of a thermal power unit, the efficiency of obtaining the differential control signal of the main steam temperature process signal is low, which affects the control performance of the main steam temperature process. SUMMARY
[0005] The embodiments of the present application provide a half-cosine type fastest tracking differential method, system and terminal device to improve the differential efficiency of the process signal of a thermal power unit.
[0006] To solve the above problems, an embodiment of the present application provides a half-cosine type fastest tracking differential method applied to a half-cosine type fastest tracking differentiator, wherein the half-cosine type fastest tracking differentiator comprises a first subtracter, a second subtracter, an adder, a first integrator, a second integrator and a delay unit; and the method comprises the following steps:
[0007] The first subtracter is used to perform subtraction operation on an input signal and a second integral signal output by the second integrator to obtain a feedback output signal;
[0008] The first integrator is used to integrate the feedback output signal to obtain a first integral signal corresponding to the feedback output signal;
[0009] The second integrator is used to integrate the first integral signal to obtain a second integral signal corresponding to the first integral signal;
[0010] The adder is used to perform addition operation on the input signal and the feedback output signal to obtain an adder output signal;
[0011] The delay unit is used to delay the second integral signal to obtain a delay signal;
[0012] The second subtractor performs a subtraction operation on the output signal of the adder and the delayed signal to obtain a half-cosine type fastest tracking differential signal.
[0013] As an improvement to the above scheme, the input terminal of the first subtractor includes: the subtrahend terminal and the minuend terminal of the first subtractor; the first subtractor includes: the first subtractor performing a subtraction operation by subtracting the input signal received at the subtrahend terminal from the second integral signal output by the second integrator received at the minuend terminal.
[0014] As an improvement to the above scheme, the first integrator includes:
[0015]
[0016] In the formula, f FI (s) is the Laplace transfer function of the first integrator; T T is the first tracking time constant, in seconds.
[0017] As an improvement to the above scheme, the second integrator includes:
[0018]
[0019] In the formula, f FI (s) is the Laplace transfer function of the second integrator; T T is the first tracking time constant, in seconds.
[0020] As an improvement to the above solution, the delay device includes:
[0021]
[0022] T L =2T T
[0023] In the formula, f L (s) is the Laplace transfer function of the delay; T L The second tracking time constant is in seconds; and T L By T T get.
[0024] Accordingly, one embodiment of the present invention also provides a half-cosine type fastest tracking differential system, including: a data acquisition device and a half-cosine type fastest tracking differential; wherein, the half-cosine type fastest tracking differential is applied to the half-cosine type fastest tracking differential method as described in the present invention;
[0025] The data acquisition device is used to collect the operating data of the target thermal power unit and generate input signals;
[0026] The half-cosine type fastest tracking differentiator is used to receive the input signal and generate a half-cosine type fastest tracking differential signal corresponding to the input signal.
[0027] As an improvement to the above scheme, the input signal is the main steam temperature process signal of the thermal power unit control process.
[0028] As an improvement to the above scheme, the expression for the half-cosine type fastest tracking differentiator is:
[0029]
[0030] In the formula, f QCTD (s) is the Laplace transfer function of the half-cosine type fastest tracking differentiator; T T The time constant is used for tracking, and the unit is seconds (s).
[0031] Accordingly, one embodiment of the present invention also provides a computer terminal device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, it implements a half-cosine type fastest tracking differential method as described in the present invention.
[0032] Accordingly, one embodiment of the present invention also provides a computer-readable storage medium, the computer-readable storage medium including a stored computer program, wherein, when the computer program is executed, it controls the device where the computer-readable storage medium is located to execute a half-cosine type fastest tracking differential method as described in the present invention.
[0033] As can be seen from the above, the present invention has the following beneficial effects:
[0034] This invention provides a 1 / 2 cosine-type fastest tracking differential method. The method involves receiving the input signal and the second integral signal output by the second integrator via a first subtractor, performing a subtraction operation to obtain a feedback output signal; integrating the feedback output signal via the first integrator to obtain a first integral signal; integrating the first integral signal via the second integrator to obtain a second integral signal; superimposing the input signal and the feedback signal via an adder to obtain an adder output signal; delaying the second integral signal via a delay unit to obtain a delayed signal; and finally, subtracting the adder output signal and the delayed signal via the second subtractor to obtain the 1 / 2 cosine-type fastest tracking differential signal. By superimposing the input signal and the input signal after two integrations, and then subtracting the delayed second integral signal, this invention improves the cutoff speed of the tracking differential, thereby increasing its differential tracking efficiency and ultimately enhancing its efficiency in processing process signals from thermal power units. Attached Figure Description
[0035] Figure 1 This is a flowchart illustrating the half-cosine type fastest tracking differential method provided in an embodiment of the present invention;
[0036] Figure 2 This is a schematic diagram of the structure of a half-cosine type fastest tracking differentiator provided in an embodiment of the present invention;
[0037] Figure 3 This is a schematic diagram of the structure of a half-cosine type fastest tracking differential system provided in an embodiment of the present invention;
[0038] Figure 4 This is a schematic diagram of the output of the second integrator process provided in an embodiment of the present invention;
[0039] Figure 5 This is a schematic diagram of the delay process output of the second integrator provided in an embodiment of the present invention;
[0040] Figure 6 This is a comparative schematic diagram of a commonly used differentiator and a half-cosine type fastest tracking differentiator provided in an embodiment of the present invention;
[0041] Figure 7 This is a schematic diagram of a terminal device structure provided in an embodiment of the present invention. Detailed Implementation
[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0043] Example 1
[0044] See Figure 1 , Figure 1 This is a flowchart illustrating a half-cosine type fastest tracking differential method according to an embodiment of the present invention, as shown below. Figure 1 As shown, this embodiment includes steps 101 to 106, and the specific steps are as follows:
[0045] The method is applied to a half-cosine type fastest tracking differentiator, which includes: a first subtractor 201, a second subtractor 202, an adder 203, a first integrator 204, a second integrator 205, and a delay unit 206.
[0046] Step 101: The input signal and the second integral signal output by the second integrator are subtracted by the first subtractor to obtain the feedback output signal.
[0047] In this embodiment, the input terminals of the first subtractor include: the subtrahend terminal and the minuend terminal of the first subtractor; the first subtractor includes: the first subtractor performing a subtraction operation by subtracting the input signal received by the subtrahend terminal from the second integral signal output by the second integrator received by the minuend terminal.
[0048] Step 102: Integrate the feedback output signal using the first integrator to obtain the first integrated signal corresponding to the feedback output signal.
[0049] In this embodiment, the first integrator includes:
[0050]
[0051] In the formula, f FI (s) is the Laplace transfer function of the first integrator; T T is the first tracking time constant, in seconds.
[0052] Step 103: Integrate the first integral signal using the second integrator to obtain the second integral signal corresponding to the first integral signal.
[0053] In this embodiment, the second integrator includes:
[0054]
[0055] In the formula, f FI (s) is the Laplace transfer function of the second integrator; T T is the first tracking time constant, in seconds.
[0056] In one specific embodiment, in T T =100s, the process output PV of the second integrator SOOL (t), such as Figure 4 As shown.
[0057] Step 104: Perform an addition operation on the input signal and the feedback output signal using the adder to obtain the adder output signal.
[0058] Step 105: Delay the second integral signal using the delay device to obtain a delayed signal.
[0059] In this embodiment, the delay device includes:
[0060]
[0061] T L =2T T
[0062] In the formula, f L (s) is the Laplace transfer function of the delay; T L The second tracking time constant is in seconds; and T L By T T get.
[0063] In one specific embodiment, in T T =100s, T L =2T T =200s, the delayed output PV of the second integrator is obtained. L (t), Figure 5 As shown.
[0064] Step 106: Subtract the output signal of the adder and the delayed signal using the second subtractor to obtain the half-cosine type fastest tracking differential signal.
[0065] In this embodiment, the input terminals of the second subtractor include a subtrahend terminal and a minuend terminal; the minuend terminal of the second subtractor is the output signal of the adder, and the subtrahend terminal of the second subtractor is a delay signal.
[0066] In a specific embodiment, the following example is given for better illustration:
[0067] The differential characteristics of the half-cosine type fastest tracking differentiator are compared with those of a commonly used differentiator; at a gain of 2, the commonly used differentiator is expressed as...
[0068] f CD (s)=2(1-f FOIF (s)),
[0069]
[0070] In the formula, f CD (s) is the Laplace transfer function of the commonly used differentiator; f FOIF (s) is the Laplace transfer function of the first-order inertial filter; T FOIF Let be the filtering time constant of the first-order inertial filter, in seconds;
[0071] Set T T =100s,T L =2T T =200s, T FOIF =200s, the input signal is a unit step, and the process output PV of the half-cosine type fastest tracking differentiator is obtained. QCTD (t), the commonly used differentiator process outputs PV CD (t), such as Figure 6 As shown;
[0072] Depend on Figure 6 It can be seen that, compared with commonly used differentiators, the cutoff speed of the process output of the half-cosine type fastest tracking differentiator is higher, indicating that the differentiating performance of the half-cosine type fastest tracking differentiator is better than that of commonly used differentiators.
[0073] In this embodiment, the adder output signal is received through the minuend of the second subtractor, and the delay signal is received through the subtraction end of the second subtractor.
[0074] Accordingly, please see Figure 3 , Figure 3 This is a schematic diagram of a half-cosine type fastest tracking differential system provided in an embodiment of the present invention, including: a data acquisition device 301 and a half-cosine type fastest tracking differential 302; wherein, the half-cosine type fastest tracking differential 302 is applied to the half-cosine type fastest tracking differential method as described in the present invention;
[0075] The data acquisition device 301 is used to acquire the operating data of the target thermal power unit and generate input signals.
[0076] The half-cosine type fastest tracking differentiator 302 is used to receive the input signal and generate a half-cosine type fastest tracking differential signal corresponding to the input signal.
[0077] In this embodiment, the input signal is the main steam temperature process signal of the thermal power unit control process.
[0078] In this embodiment, the expression for the half-cosine type fastest tracking differentiator is:
[0079]
[0080] In the formula, f QCTD (s) is the Laplace transfer function of the half-cosine type fastest tracking differentiator; T T The time constant is used for tracking, and the unit is seconds (s).
[0081] This embodiment receives the input signal and the second integral signal output by the second integrator via a first subtractor, performs a subtraction operation to obtain a feedback output signal, integrates the feedback output signal via the first integrator to obtain a first integral signal, integrates the first integral signal via the second integrator to obtain a second integral signal, superimposes the input signal and the feedback signal via an adder to obtain an adder output signal, delays the second integral signal via a delay unit to obtain a delayed signal, and finally subtracts the adder output signal and the delayed signal via the second subtractor to obtain a half-cosine type fastest tracking differential signal. The half-cosine type fastest tracking differential and the method improve the advance observation efficiency of the main steam temperature control, thereby enhancing the performance of the main steam temperature process control.
[0082] Example 2
[0083] See Figure 7 , Figure 7 This is a schematic diagram of the terminal device structure provided in an embodiment of the present invention.
[0084] One terminal device in this embodiment includes: a processor 701, a memory 702, and a computer program stored in the memory 702 and executable on the processor 701. When the processor 701 executes the computer program, it implements the steps of the aforementioned half-cosine type steepest tracking differential methods in this embodiment, for example... Figure 1 All steps of the half-cosine type fastest tracking differential method shown. Alternatively, when the processor executes the computer program, it implements the functions of each module in the above-described device embodiments, for example: Figure 3 All modules of the half-cosine type fastest tracking differential system shown.
[0085] In addition, embodiments of the present invention also provide a computer-readable storage medium, the computer-readable storage medium including a stored computer program, wherein, when the computer program is executed, it controls the device where the computer-readable storage medium is located to execute the half-cosine type fastest tracking differential method as described in any of the above embodiments.
[0086] Those skilled in the art will understand that the schematic diagram is merely an example of a terminal device and does not constitute a limitation on the terminal device. It may include more or fewer components than shown in the diagram, or combine certain components, or different components. For example, the terminal device may also include input / output devices, network access devices, buses, etc.
[0087] The processor 701 may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor. The processor 701 is the control center of the terminal device, connecting various parts of the terminal device through various interfaces and lines.
[0088] The memory 702 can be used to store the computer programs and / or modules. The processor 701 implements various functions of the terminal device by running or executing the computer programs and / or modules stored in the memory and calling the data stored in the memory 702. The memory 702 may mainly include a program storage area and a data storage area. The program storage area may store the operating system, at least one application program required for a function (such as sound playback function, image playback function, etc.), etc.; the data storage area may store data created according to the use of the mobile phone (such as audio data, phonebook, etc.). In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as hard disk, memory, plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, at least one disk storage device, flash memory device, or other volatile solid-state storage device.
[0089] Wherein, if the modules / units integrated in the terminal device are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments of the present invention can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when the computer program is executed by a processor, it can implement the steps of the various method embodiments described above. Wherein, the computer program includes computer program code, which can be in the form of source code, object code, executable file, or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, portable hard drive, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium, etc.
[0090] It should be noted that the device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Furthermore, in the accompanying drawings of the device embodiments provided by this invention, the connection relationships between modules indicate that they have communication connections, which can be specifically implemented as one or more communication buses or signal lines. Those skilled in the art can understand and implement this without any creative effort.
[0091] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.
Claims
1. A half-cosine type steepest tracking differential method, characterized in that, The method is applied to a 1 / 2 cosine-type fastest tracking differentiator, which includes: a first subtractor, a second subtractor, an adder, a first integrator, a second integrator, and a delay unit; the method includes: The first subtractor performs a subtraction operation on the input signal and the second integral signal output by the second integrator to obtain a feedback output signal. The feedback output signal is integrated using the first integrator to obtain the first integrated signal corresponding to the feedback output signal; The first integral signal is integrated by the second integrator to obtain the second integral signal corresponding to the first integral signal; The adder performs an addition operation on the input signal and the feedback output signal to obtain the adder output signal. The second integral signal is delayed by the delay device to obtain a delayed signal; The second subtractor performs a subtraction operation on the output signal of the adder and the delayed signal to obtain a half-cosine type fastest tracking differential signal. The expression for the half-cosine type fastest tracking differentiator is: In the formula, f QCTD ( s ) is the Laplace transfer function of the half-cosine type fastest tracking differentiator; T T The first tracking time constant is expressed in seconds. T L This is the second tracking time constant, measured in seconds.
2. The half-cosine type steepest tracking differential method according to claim 1, characterized in that, The input terminals of the first subtractor include: the subtrahend terminal and the minuend terminal of the first subtractor; the first subtractor includes: the first subtractor performing a subtraction operation by subtracting the input signal received at the subtrahend terminal from the second integral signal output by the second integrator received at the minuend terminal.
3. The half-cosine type steepest tracking differential method according to claim 1, characterized in that, The first integrator includes: In the formula, f FI ( s Let ) be the Laplace transfer function of the first integrator; T T is the first tracking time constant, in seconds.
4. The half-cosine type fastest tracking differential method according to claim 1, characterized in that, The second integrator includes: In the formula, f FI ( s ) is the Laplace transfer function of the second integrator; T T is the first tracking time constant, in seconds.
5. The half-cosine type fastest tracking differential method according to claim 1, characterized in that, The delay unit includes: In the formula, f L ( s Let be the Laplace transfer function of the delay; and T L Depend on T T get.
6. A half-cosine type fastest tracking differential system, characterized in that, include: A data acquisition device and a half-cosine type fastest tracking differentiator; wherein the half-cosine type fastest tracking differentiator applies the half-cosine type fastest tracking differentiator method as described in any one of claims 1 to 5; The data acquisition device is used to collect the operating data of the target thermal power unit and generate input signals; The half-cosine type fastest tracking differentiator is used to receive the input signal and generate a half-cosine type fastest tracking differential signal corresponding to the input signal.
7. The half-cosine type fastest tracking differential system according to claim 6, characterized in that, The input signal is the main steam temperature process signal of the thermal power unit control process.
8. A computer terminal device, characterized in that, The method includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor, when executing the computer program, implements a half-cosine type fastest tracking differential method as described in any one of claims 1 to 5.
9. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored computer program, wherein, when the computer program is executed, it controls the device on which the computer-readable storage medium is located to perform a half-cosine type fastest tracking differential method as described in any one of claims 1 to 5.
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