A steepest tracking differentiation device, method and storage medium

Abstract

This invention discloses a fastest tracking differential device, method, and storage medium. It involves subtracting the input signal from a second integral signal using a subtractor to obtain an output feedback signal, integrating the feedback signal using a first integrator to obtain a first integral signal, integrating the first integral signal using a second integrator to obtain a second integral signal, delaying the first integral signal using a delay unit, and then adding the delayed first integral output signal and the feedback signal using an adder. Finally, it outputs the fastest tracking differential signal corresponding to the input signal. This invention achieves fastest tracking from the differential output to the input signal by performing addition based on the subtraction result after receiving the feedback and the first integral result after the delay. Compared to a tracking differential device based on a first-order inertial filter, the fastest tracking differential device significantly improves the differential tracking performance.

Description

Technical Field

[0001] This invention relates to the field of industrial process control, and more particularly to a fastest tracking differential device, method, and storage medium. Background Technology

[0002] In industrial process control, especially in thermal power unit process control, high-frequency noise interference is prevalent in process signals. Low-pass filters (LPFs) are frequently used to filter out this interference. First-order inertial filters (FOIFs) are a widely used basic LPF, a typical exponential tracking filtering mechanism. However, FOIFs generally suffer from low output-to-input tracking efficiency. Since ideal differentiators are physically impossible to realize, and commonly used differentiators are FOIF-based tracking differentiators, they also suffer from low output-to-input tracking efficiency. Therefore, a fastest tracking differentiation strategy is urgently needed to achieve a breakthrough in the tracking mechanism and solve the problem of low output-to-input differentiation efficiency in current differentiators. Summary of the Invention

[0003] This invention provides a fastest tracking differential device, method, and storage medium to improve the efficiency of output tracking input differential.

[0004] To address the aforementioned problems, one embodiment of the present invention provides a fastest tracking differential device, comprising: a subtractor, a first integrator, a second integrator, a delay unit, and an adder;

[0005] The subtractor is used to perform a subtraction operation on the input signal and the second integral signal output by the second integrator, and output a feedback signal.

[0006] The first integrator is used to integrate the feedback signal and output a first integrated signal;

[0007] The second integrator is used to integrate the first integrated signal and output a second integrated signal;

[0008] The delay unit is used to delay the first integrated signal;

[0009] The adder is used to perform an addition operation on the feedback signal and the first integral output signal after a delay operation, and outputs the fastest tracking differential signal corresponding to the input signal.

[0010] As an improvement to the above scheme, the input signal is the superheated steam temperature process signal of the thermal power unit.

[0011] As an improvement to the above scheme, the first integrator, used to integrate the feedback signal and output a first integrated signal, includes:

[0012] After receiving the feedback signal, the first integrator integrates according to a preset first integration function to obtain a first integrated signal; wherein, the preset first integration function is specifically:

[0013]

[0014] In the formula, f FI (s) is the Laplace transfer function of the first integrator; T FT This is the fastest tracking time constant, expressed in seconds (s).

[0015] As an improvement to the above scheme, the second integrator, used to integrate the first integrated signal and output a second integrated signal, includes:

[0016] After receiving the first integration signal, the second integrator integrates the signals according to a preset second integration function to obtain a second integration signal; wherein, the preset second integration function is specifically:

[0017]

[0018] In the formula, f FI (s) is the Laplace transfer function of the second integrator; T FT This is the fastest tracking time constant, expressed in seconds (s).

[0019] As an improvement to the above solution, the delay unit, used to delay the first integrated signal, includes:

[0020] After receiving the first integral signal, the delay unit performs a delay operation on the first integral signal according to a preset delay function to obtain a delayed first integral signal; wherein, the preset delay function is specifically:

[0021]

[0022] In the formula, f L (s) is the Laplace transfer function of the delay; T FT This is the fastest tracking time constant, expressed in seconds (s).

[0023] Accordingly, one embodiment of the present invention also provides a fastest tracking differential method, comprising:

[0024] Acquire the process signal of the target thermal power unit control process; wherein, the process signal serves as the input signal of the fastest tracking differential device;

[0025] The input signal is input to the fastest tracking differential device as described in this invention to obtain the fastest tracking differential output signal corresponding to the process signal of the target thermal power unit control process.

[0026] As an improvement to the above scheme, the input signal is specifically a superheated steam temperature process signal.

[0027] As an improvement to the above scheme, the fastest tracking differential device, after receiving the input signal, differentiates the input signal according to a preset transfer function to obtain a differential output signal corresponding to the input signal; wherein, the preset transfer function is specifically:

[0028]

[0029] In the formula, f TFD (s) is the Laplace transfer function of the fastest tracking differentiating device; T FT This is the fastest tracking time constant, expressed in seconds (s).

[0030] 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 perform the fastest tracking differential method as described in the present invention.

[0031] As can be seen from the above, the present invention has the following beneficial effects:

[0032] This invention provides a fastest tracking differential device. It uses a subtractor to subtract an input signal from a second integral signal to obtain an output feedback signal. A first integrator integrates the feedback signal to obtain a first integral signal, and a second integrator integrates the first integral signal to obtain a second integral signal. A delay unit delays the first integral signal, and an adder adds the delayed first integral output signal and the feedback signal. Finally, it outputs the fastest tracking differential signal corresponding to the input signal. This invention achieves fastest tracking from the differential output to the input signal by performing subtraction and double integration on the input signal, feeding the results of the two integrations back to the subtractor for further subtraction, delaying the subtraction and integration, and then performing addition based on the received feedback subtraction result and the delayed integration result. Compared to the tracking differentiator constructed based on a first-order inertial filter, the cutoff speed of the output of the fastest tracking differentiator is significantly improved, and the differential tracking performance is significantly enhanced, realizing a breakthrough in the differential tracking mechanism from an exponential tracking mechanism to a fastest tracking mechanism. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of the fastest tracking differential device provided in an embodiment of the present invention;

[0034] Figure 2 This is a flowchart illustrating the fastest tracking differential method provided in an embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of the feedback output provided in an embodiment of the present invention;

[0036] Figure 4 This is a schematic diagram of the result of the first integrator provided in an embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram of the result of a delay device provided in an embodiment of the present invention;

[0038] Figure 6 This is a schematic diagram of the fastest tracking differential result provided in an embodiment of the present invention. Detailed Implementation

[0039] 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.

[0040] Example 1

[0041] See Figure 1 , Figure 1 This is a schematic diagram of the structure of a fastest tracking differential device provided in an embodiment of the present invention, including: a subtractor 101, a first integrator 102, a second integrator 103, a delay unit 104, and an adder 105;

[0042] The subtractor 101 is used to perform a subtraction operation on the input signal and the second integral signal output by the second integrator, and output a feedback signal.

[0043] The first integrator 102 is used to integrate the feedback signal and output a first integrated signal;

[0044] The second integrator 103 is used to integrate the first integrated signal and output a second integrated signal;

[0045] The delay unit 104 is used to delay the first integral signal;

[0046] The adder 105 is used to perform addition operations on the feedback signal and the first integral output signal after a delay operation, and output the fastest tracking differential signal corresponding to the input signal.

[0047] As an improvement to the above scheme, the input signal is the superheated steam temperature process signal of the thermal power unit.

[0048] In one specific embodiment, this embodiment can be used to monitor the superheated steam temperature of thermal power units. By performing differential processing on the superheated steam temperature process signal of thermal power units, the differential signal can be obtained more quickly, which is beneficial for advanced observation based on the obtained differential signal.

[0049] As an improvement to the above scheme, the first integrator, used to integrate the feedback signal and output a first integrated signal, includes:

[0050] After receiving the feedback signal, the first integrator integrates according to a preset first integration function to obtain a first integrated signal; wherein, the preset first integration function is specifically:

[0051]

[0052] In the formula, f FI (s) is the Laplace transfer function of the first integrator; T FT This is the fastest tracking time constant, expressed in seconds (s).

[0053] In one specific embodiment, in T FT =100s, the input signal is a unit step, the process of obtaining the first integral output PV FI (t), Figure 4 As shown.

[0054] As an improvement to the above scheme, the second integrator, used to integrate the first integrated signal and output a second integrated signal, includes:

[0055] After receiving the first integration signal, the second integrator integrates the signals according to a preset second integration function to obtain a second integration signal; wherein, the preset second integration function is specifically:

[0056]

[0057] In the formula, f FI (s) is the Laplace transfer function of the second integrator; T FT This is the fastest tracking time constant, expressed in seconds (s).

[0058] As an improvement to the above solution, the delay unit, used to delay the first integrated signal, includes:

[0059] After receiving the first integral signal, the delay unit performs a delay operation on the first integral signal according to a preset delay function to obtain a delayed first integral signal; wherein, the preset delay function is specifically:

[0060]

[0061] In the formula, f L (s) is the Laplace transfer function of the delay; T FT This is the fastest tracking time constant, expressed in seconds (s).

[0062] In one specific embodiment, in T FT =100s, the input signal is a unit step, and the process PV of obtaining the delayed output is as follows: L (t), Figure 5 As shown.

[0063] In a specific embodiment, a common differentiator is expressed as:

[0064] f CD (s)=1-f FOIF (s),

[0065]

[0066] Among them, 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;

[0067] Set T FT =T FOIF =100s, the input signal is a unit step, and the output PV of the fastest tracking differentiator process is obtained. FTD (t), the commonly used differentiator process outputs PV CD (t), such as Figure 6 As shown, compared with commonly used differentiators, the cutoff speed of the steepest tracking differentiator is higher, indicating that the differentiating performance of the steepest tracking differentiator is better than that of commonly used differentiators, and the differentiating tracking performance is significantly improved, realizing a breakthrough in the differentiating tracking mechanism from the exponential tracking mechanism to the steepest tracking mechanism.

[0068] Accordingly, see Figure 2 , Figure 2This is a flowchart illustrating a fastest tracking differential method according to an embodiment of the present invention, including steps 201 to 202:

[0069] Step 201: Acquire the process signal of the target thermal power unit control process; wherein, the process signal serves as the input signal of the fastest tracking differential device;

[0070] Step 202: Input the input signal to the fastest tracking differential device as described in this invention to obtain the fastest tracking differential output signal corresponding to the process signal of the target thermal power unit control process.

[0071] As an improvement to the above scheme, the input signal is specifically a superheated steam temperature process signal.

[0072] As an improvement to the above scheme, the fastest tracking differential device, after receiving the input signal, differentiates the input signal according to a preset transfer function to obtain a differential output signal corresponding to the input signal; wherein, the preset transfer function is specifically:

[0073]

[0074] In the formula, f TFD (s) is the Laplace transfer function of the fastest tracking differentiating device; T FT This is the fastest tracking time constant, expressed in seconds (s).

[0075] This embodiment uses a subtractor to subtract the input signal from the second integral signal to obtain an output feedback signal. A first integrator then integrates the feedback signal to obtain a first integral signal, and a second integrator integrates the first integral signal to obtain a second integral signal. A delay unit then delays the first integral signal, and an adder adds the delayed first integral output signal and the feedback signal. Finally, the fastest tracking differential signal corresponding to the input signal is output. This embodiment improves the advance observation efficiency of superheated steam temperature control through the fastest tracking differential device and method, thereby enhancing the performance of superheated steam temperature process control.

[0076] 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 control method executed by the positive feedback device, integrator limiter controller, integrator, differentiator and positive output controller as described in any of the above embodiments.

[0077] In this invention, if the modules / units integrated in the forward lead observation device for process signals 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, the control methods executed by the positive feedback device, integrator limiter controller, integrator, differentiator, and forward output controller described in this 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 executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc.

[0078] 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.

[0079] This embodiment uses a subtractor to subtract the input signal from the second integral signal to obtain an output feedback signal. A first integrator then integrates the feedback signal to obtain a first integral signal, and a second integrator integrates the first integral signal to obtain a second integral signal. A delay unit delays the first integral signal, and an adder adds the delayed first integral output signal and the feedback signal. Finally, the fastest tracking differential signal corresponding to the input signal is output. This invention performs subtraction and double integration on the input signal, feeding the results of the double integration back to the subtractor for further subtraction. It also delays the subtraction and first integration, and adds the results of the subtraction and first integration based on the received feedback, thus achieving the fastest tracking from the differential output to the input signal. Compared to a tracking differentiator based on a first-order inertial filter, the fastest tracking differentiator significantly improves the cutoff speed of the output process, resulting in a marked improvement in differential tracking performance, representing a breakthrough from an exponential tracking mechanism to a fastest tracking mechanism.

[0080] 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 fastest tracking differential device, characterized in that, include: Subtractor, first integrator, second integrator, delay unit, and adder; The subtractor is used to perform a subtraction operation on the input signal and the second integral signal output by the second integrator, and output a feedback signal; wherein, the input signal is the superheated steam temperature process signal of the thermal power unit; The first integrator is used to integrate the feedback signal and output a first integrated signal; The second integrator is used to integrate the first integrated signal and output a second integrated signal; The delay unit is used to delay the first integrated signal; The adder is used to perform an addition operation on the feedback signal and the first integral output signal after a delay operation, and output the fastest tracking differential signal corresponding to the input signal; The fastest tracking differentiator, upon receiving an input signal, differentiates the input signal according to a preset transfer function to obtain a differential output signal corresponding to the input signal; the preset transfer function is specifically: ； In the formula, f TFD ( s ) is the Laplace transfer function of the fastest tracking differentiating device; T FT This is the fastest tracking time constant, in seconds.

2. The fastest tracking differential device according to claim 1, characterized in that, The first integrator, used to integrate the feedback signal and output a first integrated signal, includes: After receiving the feedback signal, the first integrator integrates according to a preset first integration function to obtain a first integrated signal; wherein, the preset first integration function is specifically: ； In the formula, f FI ( s Let ) be the Laplace transfer function of the first integrator; T FT This is the fastest tracking time constant, in seconds.

3. The fastest tracking differential device according to claim 1, characterized in that, The second integrator, used to integrate the first integrated signal and output a second integrated signal, includes: After receiving the first integration signal, the second integrator integrates the signals according to a preset second integration function to obtain a second integration signal; wherein, the preset second integration function is specifically: ； In the formula, f FI ( s ) is the Laplace transfer function of the second integrator; T FT This is the fastest tracking time constant, in seconds.

4. The fastest tracking differential device according to claim 1, characterized in that, The delay unit is used to delay the first integrated signal, including: After receiving the first integral signal, the delay unit performs a delay operation on the first integral signal according to a preset delay function to obtain a delayed first integral signal; wherein, the preset delay function is specifically: In the formula, f L ( s ) is the Laplace transfer function of the delay; T FT This is the fastest tracking time constant, in seconds.

5. A fastest tracking differential method, characterized in that, include: Acquire the process signal of the target thermal power unit control process; wherein, the process signal serves as the input signal of the fastest tracking differential device; The input signal is input to the fastest tracking differential device as described in any one of claims 1 to 4 to obtain the fastest tracking differential output signal corresponding to the process signal of the target thermal power unit control process.

6. The fastest tracking differential method according to claim 5, characterized in that, The input signal is specifically the superheated steam temperature process signal.

7. 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 the fastest tracking differential method as described in any one of claims 5 to 6.

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