An inverse hyperbolic sine tracking differentiation apparatus and method

Abstract

The application discloses a kind of anti-rising sine tracking differential devices and methods, by first subtracter to input signal and the output signal of second integrator carry out subtraction operation, the output result of subtracter is input to first integrator and is integrated, and the output result of first integrator is input to second integrator and is integrated;By delay ware to the output result of second integrator is delayed, the output result of first integrator and input signal are input to second subtracter and carry out subtraction operation, and the output result of second subtracter and the output result of second integrator after time delay are transmitted to third subtracter and carry out subtraction operation, obtain anti-rising sine tracking differential signal.The application subtracts the sum of first integration result and second integration result after time delay from input signal, can improve the cut-off speed of output differential signal, improves the tracking efficiency of differentiator.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of industrial process control, and in particular to an inverse hyperbolic sine tracking differentiator and method. BACKGROUND

[0002] In the field of industrial process control, such as thermal power unit process control, the lead observation of thermal power unit process signals plays an important role in improving the performance of process control. In the lead observation, a differentiator is usually involved. However, when the load disturbance of the thermal power unit changes dramatically, the tracking efficiency of the commonly used differentiator is insufficient, which directly leads to low performance of the lead observation of the reheated steam temperature process control, affecting the performance of the reheated steam temperature control system, and thus failing to meet the requirements of fast frequency modulation of the thermal power unit. Therefore, there is an urgent need for a tracking differentiator to solve the problem of low tracking efficiency of the commonly used differentiator. SUMMARY

[0003] The embodiments of the present application provide an inverse hyperbolic sine tracking differentiator and method to improve the tracking efficiency of the differentiator.

[0004] To solve the above problems, an embodiment of the present application provides an inverse hyperbolic sine tracking differentiator, comprising: a first subtracter, a second subtracter, a first integrator, a second integrator, a third subtracter and a delay unit.

[0005] The input end of the first subtracter is used to receive an input signal and an output signal of the second integrator, and the output end of the first subtracter is connected with the input end of the first integrator.

[0006] The output end of the first integrator is connected with the input end of the second integrator and the input end of the second subtracter respectively, the input end of the second subtracter is also used to receive an input signal, and the output end of the second subtracter is connected with the input end of the third subtracter.

[0007] The output end of the second integrator is connected with the input end of the delay unit.

[0008] The output end of the delay unit is connected with the input end of the third subtracter.

[0009] The output end of the third subtracter is used to output a differentiated signal of the input signal; wherein the differentiated signal is the output of the inverse hyperbolic sine tracking differentiator.

[0010] As an improvement of the above scheme, the first integrator comprises:

[0011]

[0012] In the formula, f FI (s) is the Laplace transfer function of the first integrator; TT T is a tracking time constant, in seconds.

[0013] As an improvement of the above-mentioned scheme, the second integrator comprises:

[0014]

[0015] wherein fL(s) is a Laplace transfer function of the delay unit; and TT is a tracking time constant, in seconds. FI (s) is a Laplace transfer function of the second integrator; and T T T is a tracking time constant, in seconds.

[0016] As an improvement of the above-mentioned scheme, the delay unit comprises:

[0017]

[0018] wherein fL(s) is a Laplace transfer function of the delay unit; and TT is a tracking time constant, in seconds.

[0019] As an improvement of the above-mentioned scheme, the input end of the first subtractor comprises: a minuend end and a subtrahend end of the first subtractor; and the first subtractor comprises: the first subtractor performs a subtraction operation on an input signal received by the minuend end and a second integral signal output by the second integrator received by the subtrahend end.

[0020] As an improvement of the above-mentioned scheme, the input end of the second subtractor comprises: a minuend end and a subtrahend end of the second subtractor; and the second subtractor comprises: the second subtractor performs a subtraction operation on an input signal received by the minuend end and a first integral signal output by the first integrator received by the subtrahend end.

[0021] As an improvement of the above-mentioned scheme, the input end of the third subtractor comprises: a minuend end and a subtrahend end of the third subtractor; and the third subtractor comprises: the third subtractor performs a subtraction operation on an input signal received by the minuend end and an output signal of the delay unit received by the subtrahend end.

[0022] Correspondingly, an embodiment of the present application further provides a hyperbolic sine tracking differentiation method, comprising:

[0023] obtaining a target thermal power generating unit generation process signal to generate an input signal;

[0024] transmitting the input signal to the hyperbolic sine tracking differentiation device to obtain a differentiation signal corresponding to the input signal of the target thermal power generating unit.

[0025] As an improvement of the above-mentioned scheme, the hyperbolic sine tracking differentiation device comprises:

[0026] As an improvement of the above-mentioned scheme, the hyperbolic sine tracking differentiation device comprises:

[0027] In the formula, f IASTD (s) is the Laplace transfer function of the inverse hyperbolic sine tracking differential device; T T is a tracking time constant, and the unit is s.

[0028] From the above, the present application has the following beneficial effects:

[0029] The present application provides an inverse hyperbolic sine tracking differential device, which performs subtraction operation on an input signal and an output signal of a second integrator through a first subtractor, inputs an output result of the subtractor into a first integrator for integration, and inputs an output result of the first integrator into a second integrator for integration; performs time delay on the output result of the second integrator through a time delay device, performs subtraction operation on the output result of the first integrator and the input signal through a second subtractor, and transmits an output result of the second subtractor and the time-delayed output result of the second integrator to a third subtractor for subtraction operation, to obtain an inverse hyperbolic sine tracking differential signal. The present application subtracts the sum of the first integration result and the time-delayed second integration result from the input signal, which can improve the cutoff speed of the output differential signal, and further faster calculate the differential result, improve the tracking efficiency of the differentiator, and thus lay a foundation for improving the advance observation efficiency of the thermal power generating unit. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a structural schematic diagram of the inverse hyperbolic sine tracking differential device provided by an embodiment of the present application;

[0031] Figure 2 is a flow schematic diagram of the inverse hyperbolic sine tracking differential method provided by an embodiment of the present application;

[0032] Figure 3 is an output result schematic diagram of the first integrator provided by an embodiment of the present application;

[0033] Figure 4 is an output result schematic diagram of the second subtractor provided by an embodiment of the present application;

[0034] Figure 5 is an output result schematic diagram of the time delay device provided by an embodiment of the present application;

[0035] Figure 6 is a result comparison schematic diagram of the common differentiator and the inverse hyperbolic sine tracking differential device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0036] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort are within the protection scope of the present application.

[0037] Embodiment one

[0038] Referring to Figure 1 , Figure 1 is a structural schematic diagram of an inverse hyperbolic sine tracking differential device provided by an embodiment of the present application, comprising: a first subtracter 101, a second subtracter 102, a first integrator 103, a second integrator 104, a third subtracter 105 and a delay device 106.

[0039] An input end of the first subtracter 101 is configured to receive an input signal and an output signal of the second integrator 104, and an output end of the first subtracter 101 is connected with an input end of the first integrator 103.

[0040] An output end of the first integrator 103 is connected with an input end of the second integrator 104 and an input end of the second subtracter 102 respectively, and an input end of the second subtracter 102 is also configured to receive the input signal, and an output end of the second subtracter 102 is connected with an input end of the third subtracter 105.

[0041] An output end of the second integrator 104 is connected with an input end of the delay device 106.

[0042] An output end of the delay device 106 is connected with the input end of the third subtracter 105.

[0043] An output end of the third subtracter 105 is configured to output a differential signal of the input signal, and the differential signal is an output of the inverse hyperbolic sine tracking differential device.

[0044] As an improvement of the above-mentioned solution, the first integrator 103 comprises:

[0045]

[0046] In the formula, f FI (s) is a Laplace transfer function of the first integrator; T T is a tracking time constant, and the unit is s.

[0047] In a specific embodiment, when T T = 100 s, and the input signal is a unit step, a process PV FI(t), Figure 3 as shown.

[0048] As an improvement of the above-mentioned scheme, the second integrator 104 comprises:

[0049]

[0050] wherein f FI (s) is the Laplace transfer function of the second integrator; T T is the tracking time constant, unit s.

[0051] As an improvement of the above-mentioned scheme, the delay 106 comprises:

[0052]

[0053] wherein f L (s) is the Laplace transfer function of the delay; T T is the tracking time constant, unit s.

[0054] In a specific embodiment, when T T = 100 s, the input signal is a unit step, the process PV L (t), Figure 5 as shown.

[0055] As an improvement of the above-mentioned scheme, the input end of the first subtractor 101 comprises: the minuend end and the subtrahend end of the first subtractor; the first subtractor 101 comprises: the first subtractor performs subtraction operation on the input signal received by the minuend end and the second integral signal output by the second integrator received by the subtrahend end.

[0056] As an improvement of the above-mentioned scheme, the input end of the second subtractor 102 comprises: the minuend end and the subtrahend end of the second subtractor; the second subtractor 102 comprises: the second subtractor performs subtraction operation on the input signal received by the minuend end and the first integral signal output by the first integrator received by the subtrahend end.

[0057] In a specific embodiment, when T T = 100 s, the input signal is a unit step, the process PV SS (t), Figure 4 as shown.

[0058] As an improvement to the above scheme, the input terminals of the third subtractor 105 include: the subtrahend terminal and the minuend terminal of the third subtractor; the third subtractor 105 includes: the third subtractor performing a subtraction operation by subtracting the input signal received at the subtrahend terminal from the output signal received at the minuend terminal from the delay unit.

[0059] In one specific embodiment, for better illustration, the differential characteristics of the inverse-sine tracking differentiator are compared with those of a commonly used differentiator;

[0060] With a gain of 1, the commonly used differentiator expression is:

[0061] f CD (s)=1-f FOIF (s),

[0062]

[0063] 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;

[0064] Set T T =100s, T FOIF =100s, the input signal is a unit step, and the output PV of the inverse rising sine tracking differentiator is obtained. IASTD (t), the commonly used differentiator process outputs PV CD (t), such as Figure 6 As shown.

[0065] Depend on Figure 6 It can be seen that, compared with commonly used differentiators, the inverse-sine tracking differentiator has a higher cutoff speed at the process output, indicating that the differentiating performance of the inverse-sine tracking differentiator is better than that of commonly used differentiators.

[0066] See Figure 2 , Figure 2 This is a flowchart illustrating an inverse rising sine wave tracking differential method according to an embodiment of the present invention, as shown below. Figure 2 As shown, this embodiment includes steps 201 to 202, and the specific steps are as follows:

[0067] Step 201: Obtain the generation process signal of the target thermal power unit and generate the input signal.

[0068] In this embodiment, the input signal is a superheated steam temperature process signal.

[0069] Step 202: transmit the input signal to the anti-rising sine tracking differentiation device as described in the application to obtain the differential signal corresponding to the input signal of the target thermal power unit.

[0070] In the embodiment, the anti-rising sine tracking differentiation device comprises:

[0071]

[0072] wherein, f IASTD (s) is the Laplace transfer function of the anti-rising sine tracking differentiation device; T T is a tracking time constant, and the unit is s.

[0073] In the embodiment, the input signal and the output signal of the second integrator are subjected to subtraction operation by the first subtractor, the output result of the subtractor is input into the first integrator for integration, and the output result of the first integrator is input into the second integrator for integration; the output result of the second integrator is subjected to time delay by the time delay device, the output result of the first integrator and the input signal are input into the second subtractor for subtraction operation, and the output result of the second subtractor and the time-delayed output result of the second integrator are transmitted to the third subtractor for subtraction operation to obtain the anti-rising sine tracking differentiation signal. The anti-rising sine tracking differentiation method is used in the embodiment, which is beneficial to improving the leading observation efficiency of the reheated steam temperature control, so as to improve the reheated steam temperature process control performance.

[0074] It should be noted that the device embodiments described above are only schematic, wherein the units described as separate components can or can not be physically separated, and the components displayed as units can or can not be physical units, i.e., they can be located in one place, or distributed on multiple network units. Part or all of the modules can be selected to achieve the purpose of the embodiment according to actual needs. In addition, the connection relationship between the modules in the device embodiment provided by the application indicates that there is a communication connection between them, which can be implemented as one or more communication buses or signal lines. Those skilled in the art can understand and implement it without creative labor.

[0075] The above describes the preferred embodiments of the application. It should be noted that those skilled in the art can make several improvements and refinements without departing from the principles of the application, and these improvements and refinements are also considered within the protection scope of the application.

Claims

1. An inverse hyperbolic sine tracking differentiation device characterized by, The anti-rising sine tracking differentiation device comprises: a first subtracter, a second subtracter, a first integrator, a second integrator, a third subtracter and a time delay device; an input end of the first subtracter is configured to receive an input signal and an output signal of the second integrator, and an output end of the first subtracter is connected to an input end of the first integrator; an output end of the first integrator is connected to an input end of the second integrator and an input end of the second subtracter, respectively, the input end of the second subtracter is also configured to receive the input signal, and an output end of the second subtracter is connected to an input end of the third subtracter; an output end of the second integrator is connected to an input end of the time delay device; an output end of the time delay device is connected to the input end of the third subtracter; an output end of the third subtracter is configured to output a differential signal of the input signal; wherein the differential signal is an output of the anti-rising sine tracking differentiation device; the anti-rising sine tracking differentiation device comprises: where f IASTD (s) is the Laplace transfer function of the inverse hyperbolic tangent tracking derivative device; T T is the tracking time constant in s.

2. An inverse hyperbolic sine tracking differentiation device according to claim 1, wherein the first integrator comprises: where f FI (s) is the Laplace transfer function of the first integrator; T T is the tracking time constant in s.

3. The anti-windup, sigmoidal tracking differentiation apparatus of claim 1, wherein, the second integrator comprises: where f FI (s) is the Laplace transfer function of the second integrator; T T is the tracking time constant in s.

4. The anti-windup, sigmoidal tracking differentiation apparatus of claim 1, wherein, the time delay device comprises: where f L (s) is the Laplace transfer function of the delay; T T is the tracking time constant in s.

5. The anti-windup, sigmoidal tracking differentiation apparatus of claim 1, wherein, the input end of the first subtracter comprises a minuend end and a subtrahend end of the first subtracter; the first subtracter comprises: the first subtracter performs a subtraction operation on the input signal received by the minuend end and the second integral signal output by the second integrator received by the subtrahend end.

6. The anti-windup, sigmoidal tracking differentiation apparatus of claim 1, wherein, the input end of the second subtracter comprises a minuend end and a subtrahend end of the second subtracter; the second subtracter comprises: the second subtracter performs a subtraction operation on the input signal received by the minuend end and the first integral signal output by the first integrator received by the subtrahend end.

7. The arcsine hyperbolic cotangent tracking differentiation apparatus of claim 1, wherein, the input end of the third subtracter comprises a minuend end and a subtrahend end of the third subtracter; the third subtracter comprises: the third subtracter performs a subtraction operation on the input signal received by the minuend end and the output signal of the time delay device received by the subtrahend end.

8. An inverse hyperbolic sine tracking differentiation method, characterized by, The anti-rising sine tracking differentiation device comprises: acquiring a target thermal power generating unit generation process signal to generate an input signal; transmitting the input signal to the anti-rising sine tracking differentiation device according to any one of claims 1 to 7 to obtain a differential signal corresponding to the input signal of the target thermal power generating unit.

9. The inverse sine tracking differentiation method of claim 8, wherein, The input signal is a superheated steam temperature process signal.

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