CN113176456B - Online measuring device and method for noise interference level of second-order advanced observer - Google Patents
Online measuring device and method for noise interference level of second-order advanced observer Download PDFInfo
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Abstract
The invention discloses an online measuring device and method for noise interference level of a second-order advanced observer, wherein the online measuring device comprises: the high-pass filter A is connected with the input end of the second-order advanced observer to obtain a high-pass filtering signal A; the high-pass filter B is connected with the output end of the second-order advanced observer to obtain a high-pass filtering signal B; and the high-frequency noise power gain value calculation module is respectively connected with the output ends of the high-pass filter A and the high-pass filter B and is used for calculating the noise power gain according to the high-pass filtering signal A and the high-pass filtering signal B to obtain a noise power gain value. Therefore, the high-frequency noise power gain condition of the second-order advanced observer is continuously measured under the condition that the online work of the second-order advanced observer is not influenced, and the noise interference level of the second-order advanced observer is judged, so that the online work of the second-order advanced observer is better adjusted.
Description
Technical Field
The invention relates to the technical field of process control of thermal power generating units, in particular to an online measuring device and method for noise interference level of a second-order advanced observer.
Background
In the field of thermal power unit process control, advance information of process response can be acquired by using the advance observer, and the advance observer has important significance for improving process control performance. The advance observer has various forms, such as a Differentiator (D), a Proportional-Derivative (PD) controller, and the like. However, the advance observer has a problem of High frequency noise interference amplification, and when the High frequency noise interference level is High, for example, the High frequency noise power gain (HFNAG) is High, the High frequency noise interference level may cause serious interference to the output signal of the advance observer, and even cause the advance observer to fail to work normally. In order to fully utilize the advantages of advanced observation in process control and control the advanced observation at a lower high-frequency noise interference level, the problem of online judgment of the high-frequency noise interference level of the advanced observation needs to be solved, and the high-frequency noise power gain reflects the high-frequency noise interference level to a certain extent.
Disclosure of Invention
The invention aims to provide a device and a method for online measuring the noise interference level of a second-order advanced observer.
To achieve the above object, the present invention provides an online measuring device of a noise interference level of a second-order advanced observer, the online measuring device comprising:
the high-pass filter A is connected with the input end of the second-order advanced observer and used for acquiring an input signal of the second-order advanced observer to obtain a high-pass filtering signal A;
the high-pass filter B is connected with the output end of the second-order advanced observer and used for acquiring an output signal of the second-order advanced observer so as to obtain a high-pass filtering signal B;
and the high-frequency noise power gain value calculation module is respectively connected with the output ends of the high-pass filter A and the high-pass filter B and is used for calculating the noise power gain according to the high-pass filtering signal A and the high-pass filtering signal B to obtain the high-frequency noise power gain value.
Preferably, the high frequency noise power gain value calculating module includes:
an algebraic operation A unit, configured to perform a square operation on the high-pass filtered signal A to obtain a result of the square operation A, perform a square operation on the high-pass filtered signal A subjected to pure hysteresis processing to obtain a result of a square operation C, and perform a difference algebraic operation on the result of the square operation A and the result of the square operation C to obtain a result of the algebraic operation A;
the integral operation A unit is used for carrying out integral operation on the result of the algebraic operation A to obtain an integral operation A result;
an algebraic operation B unit, configured to perform a square operation on the high-pass filtered signal B to obtain a result of the square operation B, perform a square operation on the high-pass filtered signal B subjected to pure hysteresis processing to obtain a result of a square operation D, and perform a difference algebraic operation on the result of the square operation B and the result of the square operation D to obtain a result of the algebraic operation B;
the integral operation B unit is used for carrying out integral operation on the result of the algebraic operation B to obtain an integral operation B result;
and the division operation unit is used for carrying out division operation on the result of the integral operation A and the result of the integral operation B to obtain a high-frequency noise power gain value of the second-order advanced observer.
Preferably, the noise interference level determination module is connected to the output end of the high-frequency noise power gain value calculation module, and is configured to determine the noise interference level of the second-order advance observer according to a preset threshold, determine that the noise interference level of the second-order advance observer is higher when the high-frequency noise power gain value is greater than or equal to the threshold, and determine that the noise interference level of the second-order advance observer is lower when the high-frequency noise power gain value is smaller than the threshold.
Preferably, the preset threshold is 10.
Preferably, the transfer function of the second order advance observer is:
SOLO(s)＝SOIIM(s)TOIF(s)
wherein, soiim(s) is a transfer function of the second-order inertial inverse model, and the formula is as follows:
wherein, TSOIIMIs the time constant of the second order inertial inverse model;
TOIF(s) is the transfer function of the third order inertial filter, and is given by:
wherein, TTOIFFor the third order inertia filteringThe time constant of the device.
Preferably, the structure and parameters of the high-pass filter a are the same as those of the high-pass filter B, and both the high-pass filter a and the high-pass filter B use a second-order high-pass filter.
The invention also provides an online measurement method of the noise interference level of the second-order advanced observer, which is applied to the online measurement device of the noise interference level of the second-order advanced observer and comprises the following steps: acquiring an input signal of the second-order advanced observer, and acquiring a high-pass filtering signal A through a high-pass filter A;
acquiring an output signal of the second-order advanced observer, and acquiring a high-pass filtering signal B through a high-pass filter B;
and calculating noise power gain according to the high-pass filtering signal A and the high-pass filtering signal B to obtain the high-frequency noise power gain value.
Preferably, the method further comprises the following steps: and judging the noise interference level of the second-order advance observer according to a preset threshold, judging that the noise interference level of the second-order advance observer is higher when the high-frequency noise power gain value is greater than or equal to the threshold, and judging that the noise interference level of the second-order advance observer is lower when the high-frequency noise power gain value is smaller than the threshold, wherein the threshold is 10.
Preferably, the performing of the power noise gain calculation according to the input signal of the second order advance observer and the output signal of the second order advance observer includes:
carrying out square operation on the high-pass filtering signal A to obtain a result of square operation A, carrying out square operation on the high-pass filtering signal A after pure hysteresis processing to obtain a result of square operation C, and carrying out difference algebraic operation on the result of square operation A and the result of square operation C to obtain a result of algebraic operation A;
performing integral operation on the result of the algebraic operation A to obtain an integral operation A result;
carrying out square operation on the high-pass filtering signal B to obtain a square operation B result, carrying out square operation on the high-pass filtering signal B after pure lag processing to obtain a square operation D result, and carrying out difference algebraic operation on the square operation B result and the square operation D result to obtain an algebraic operation B result;
performing integral operation on the result of the algebraic operation B to obtain a result of the integral operation B;
and performing division operation on the result of the integral operation A and the result of the integral operation B to obtain a high-frequency noise power gain value of the second-order advanced observer.
Preferably, the structure and parameters of the high-pass filter a are the same as those of the high-pass filter B, and both the high-pass filter a and the high-pass filter B use a second-order high-pass filter.
The invention also provides a computer terminal device comprising one or more processors and a memory. A memory coupled to the processor for storing one or more programs; when executed by the one or more processors, cause the one or more processors to implement a method of online measurement of a noise disturbance level of a second order lead observer, as described in any one of the above.
The invention also provides a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the method for online measurement of the noise disturbance level of a second-order advanced observer as defined in any of the above.
In the device and the method for measuring the noise interference level of the second-order advance observer on line, a calculation result of the high-frequency noise power gain of the second-order advance observer is obtained through a series of calculations of a high-frequency noise signal in an output signal of the second-order advance observer and a high-frequency noise signal in an input signal of the second-order advance observer. The online measurement result of the high-frequency noise power gain of the second-order advance observer can be continuously given, the high-frequency noise interference level of the second-order advance observer is judged according to the online measurement result, the online measurement method has good significance for guiding the online adjustment of the parameters of the second-order advance observer, and no influence is caused on the online work of the second-order advance observer.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an online measurement device for noise interference level of a second-order advanced observer according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a high frequency noise power gain value calculation module according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of an online measurement device for noise interference level of a second-order advanced observer according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a second-order advanced observer according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating the results of an input signal simulation of a second order lead observer according to an embodiment of the present invention;
FIG. 6 is a diagram illustrating the results of a second order advanced observer output signal simulation according to an embodiment of the present invention;
FIG. 7 is a diagram illustrating the results of an online measurement device of the noise interference level of a second-order advanced observer according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a computer terminal device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be understood that the step numbers used herein are for convenience of description only and are not intended as limitations on the order in which the steps are performed.
It is to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The terms "comprises" and "comprising" indicate the presence of the described features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The term "and/or" refers to and includes any and all possible combinations of one or more of the associated listed items.
Referring to fig. 1, an embodiment of the present invention provides an online measurement apparatus for noise interference level of a second-order advanced observer, including:
the high-pass filter A is connected with the input end of the second-order advanced observer and used for acquiring an input signal of the second-order advanced observer to obtain a high-pass filtering signal A;
the high-pass filter B is connected with the output end of the second-order advanced observer and used for acquiring an output signal of the second-order advanced observer so as to obtain a high-pass filtering signal B;
and the high-frequency noise power gain value calculation module is respectively connected with the output ends of the high-pass filter A and the high-pass filter B and is used for calculating the noise power gain according to the high-pass filtering signal A and the high-pass filtering signal B to obtain the high-frequency noise power gain value.
In this embodiment, the second-order advanced observer is used for advanced observation of response of the superheated steam temperature process of the thermal power generating unit, and an input signal of the second-order advanced observer includes a response signal of the superheated steam temperature process of the thermal power generating unit. And accessing the output signal of the second-order advance observer to the input end of the High-pass filter A, obtaining a High-pass filter signal A (HPFS: A) at the output end of the High-pass filter A, namely, taking a High-frequency noise signal in the output signal of the second-order advance observer, and expressing the High-pass filter signal A by using the HPFS: A (t), wherein the unit is dimensionless. And the input signal of the second-order advance observer is connected to the input end of the high-pass filter B, the input signal of the second-order advance observer is specifically the response of the thermal power generating unit in the overheat steam temperature process, and the noise signal contained in the actual process response signal naturally contains a random quantization noise signal after the actual process response signal is converted from analog quantity to digital quantity. And obtaining a High-pass filter signal B (HPFS: B) at the output end of the High-pass filter B, namely, taking a High-frequency noise signal in the input signal of the second-order advanced observer, and expressing the High-pass filter signal B by using the HPFS: B (t), wherein the unit is dimensionless. And accessing the high-pass filtering signal A to an input A of a high-frequency noise power gain value calculation module, and accessing the high-pass filtering signal B to an input B of the high-frequency noise power gain value calculation module. And obtaining a calculation result of the high-frequency noise power gain of the high-pass filtering signal A relative to the high-pass filtering signal B through the high-frequency noise power gain value calculation module, and outputting the calculation result of the high-frequency noise power gain at the output end of the high-frequency noise power gain value calculation module.
Calculation of the high frequency noise power gain, expressed as
Is decomposed into
Wherein, HFNPG (t) is the calculation result of the high frequency noise power gainThe units are dimensionless. HPFS: a (t) is the high pass filtered signal a in dimensionless units. HPFS A (T-T)PL) Is a pure lag signal of the high-pass filtered signal a in dimensionless units. HPFS B (t) is the high pass filtered signal B in dimensionless units. HPFS A (T-T)PL) Is a pure lag signal of the high-pass filtered signal a in dimensionless units. T isPLAre common pure lag time constants in seconds.
The method is also suitable for all high-order advanced observers with the order greater than 2, such as a third-order advanced observer, a fourth-order advanced observer, a fifth-order advanced observer, a sixth-order advanced observer, a seventh-order observer, a high-order advanced observer and an eighth-order advanced observer.
In one embodiment, the high frequency noise power gain value calculating module includes:
an algebraic operation A unit, configured to perform a square operation on the high-pass filtered signal A to obtain a result of the square operation A, perform a square operation on the high-pass filtered signal A after pure hysteresis processing to obtain a result of a square operation C, and perform a difference algebraic operation on the result of the square operation A and the result of the square operation C to obtain a result of the algebraic operation A;
the integral operation A unit is used for carrying out integral operation on the result of the algebraic operation A to obtain an integral operation A result;
an algebraic operation B unit, configured to perform a square operation on the high-pass filtered signal B to obtain a result of the square operation B, perform a square operation on the high-pass filtered signal B after pure hysteresis processing to obtain a result of a square operation D, and perform a difference algebraic operation on the result of the square operation B and the result of the square operation D to obtain a result of the algebraic operation B;
the integral operation B unit is used for carrying out integral operation on the result of the algebraic operation B to obtain an integral operation B result;
and the division operation unit is used for carrying out division operation on the result of the integral operation A and the result of the integral operation B to obtain a high-frequency noise power gain value of the second-order advanced observer.
Referring to FIG. 2, in the present embodiment, the high-pass filtering signal A is inputted to an input terminal of a Square operation A (SO: A), and a Square operation signal A (SOS: A) expressed as
SOS:A(t)＝[HPFS:A(t)]2
Wherein, A (t) is the square operation signal A, and the unit is dimensionless. HPFS: a (t) is the high pass filtered signal a in dimensionless units.
The high-pass filtered signal A is connected to the input end of a Pure Lag C (Pure Lag of C, PL: C), and a Pure Lag signal C (Pure Lag of C, PLS: C) is obtained at the output end of the Pure Lag C
PLS:C(t)＝HPFS:A(t-TPL)
Wherein PLS C (t) is the pure hysteresis signal C in dimensionless units. HPFS A (T-T)PL) Is a pure lag signal of the high-pass filtered signal A, TPLAre a common pure lag time constant in seconds.
The pure lag signal C is connected to the input end of a Square operation C (SO: C), and the Square operation signal C (SOS: C) expressed as C is obtained at the output end of the Square operation C
SOS:C(t)＝[PLS:C(t)]2
Wherein, SOS, C (t) is the square operation signal C, and the unit is dimensionless. PDLS C (t) is the pure lag signal C in dimensionless units.
The square operation signal A is connected to the addition input end of an Algebraic operation A (AO: A), the square operation signal C is connected to the subtraction input end of the Algebraic operation A, and an Algebraic operation signal A (AOS: A) expressed as AOS: A) is obtained at the output end of the Algebraic operation A
AOS:A(t)＝SOS:A(t)-SOS:C(t)
Wherein, A (t) is the algebraic operation signal A, and the unit is dimensionless. SOS (A), (t) is the square operation signal A, and the unit is dimensionless. SOS (C), (t) is the square operation signal C, and the unit is dimensionless.
The algebraic operation signal A is connected to the input end of an Integral operation A (IO: A), and the Integral operation signal A (IOS: A) expressed as
And IOS (A), (t) is the integral operation signal A, and the unit is dimensionless. AOS (A), (t) is the algebraic operation signal A, and the unit is dimensionless.
The high-pass filtering signal B is connected to the input end of a Square operation B (SO: B), and the Square operation signal B (SOS: B) expressed as B is obtained at the output end of the Square operation B
SOS:B(t)＝[HPFS:B(t)]2
Wherein, SOS, B (t) is the square operation signal B, and the unit is dimensionless. HPFS B (t) is the high pass filtered signal B in dimensionless units.
The high-pass filtered signal B is connected to the input end of a Pure Lag D (Pure Lag of D, PL: D), and a Pure Lag signal D (Pure Lag signal of D, PLS: D) is obtained at the output end of the Pure Lag D
PLS:D(t)＝HPFS:B(t-TPL)
Wherein PLS: D (t) is the pure hysteresis signal D in dimensionless units. HPFS B (T-T)PL) Is a pure lag signal of the high-pass filtered signal B, TPLAre a common pure lag time constant in seconds.
The pure lag signal D is connected to the input end of the Square operation D (SO: D), and the Square operation signal D (SOS: D) expressed as D is obtained at the output end of the Square operation D
SOS:D(t)＝[PLS:D(t)]2
Wherein, SOS, D (t) is the square operation signal D, and the unit is dimensionless. PLS D (t) is the pure hysteresis signal D in dimensionless units.
The square operation signal B is connected to the addition input end of an Algebraic operation B (AO: B), the square operation signal D is connected to the subtraction input end of the Algebraic operation B, and an Algebraic operation signal B (AOS: B) expressed as AOS: B) is obtained at the output end of the Algebraic operation B
AOS:B(t)＝SOS:B(t)-SOS:D(t)
Wherein, AOS, B and t are the algebraic operation signal B with dimensionless unit. SOS (B), (t) is the square operation signal B, and the unit is dimensionless. SOS (D), (t) is the square operation signal D, and the unit is dimensionless.
The algebraic operation signal B is connected to the input end of an Integral operation B (IO: B), and the Integral operation signal B (IOS: B) expressed as
And IOS, B (t) is the integral operation signal B, and the unit is dimensionless. And B (t) is the algebraic operation signal B with dimensionless unit.
The integral operation signal A is accessed to a dividend input end of Division Operation (DO), the integral operation signal B is accessed to a divisor input end of the Division operation, and the high-frequency noise power gain value calculation module result is obtained at the output end of the Division operation and is expressed as
Wherein, hfnpg (t) is a calculation result of the high frequency noise power gain, and the unit is dimensionless. IOS (A), (t) is the integral operation signal A, and the unit is dimensionless. IOS is the integral operation signal B, and the unit is dimensionless.
In one embodiment, the noise disturbance level determination module is connected to the output end of the high-frequency noise power gain value calculation module, and is configured to determine the noise disturbance level of the second-order advance observer according to a preset threshold, determine that the noise disturbance level of the second-order advance observer is higher when the high-frequency noise power gain value is greater than or equal to the threshold, and determine that the noise disturbance level of the second-order advance observer is lower when the high-frequency noise power gain value is smaller than the threshold.
Referring to fig. 3, in this embodiment, the present invention further includes a noise interference level determining module, which accesses the high-pass filtered signal a to the input a of the high-frequency noise power gain value calculating module, accesses the high-pass filtered signal B to the input B of the high-frequency noise power gain value calculating module, and obtains a calculation result of the high-frequency noise power gain of the second-order advanced observer at an output end of the high-frequency noise power gain value calculating module. Using HFNPGSOLO(t) expressing the calculation result of the high-frequency noise power gain of the second-order advanced observer, wherein the unit is dimensionless. And judging the high-frequency noise interference level of the second-order advance observer according to the calculation result of the high-frequency noise power gain of the second-order advance observer. If the HFNPG isSOLOAnd (t) if the variation range of the second-order advanced observer is smaller than a preset threshold, judging that the high-frequency noise interference level of the second-order advanced observer is lower. If the HFNPG isSOLOAnd (t) if the variation range of the second-order advanced observer is larger than or equal to the threshold, judging that the high noise interference level of the second-order advanced observer is higher. The input signal of the second-order advanced observer is specifically the response of the thermal power generating unit in the superheated steam temperature process;
in one embodiment, the preset threshold is 10.
In this embodiment, the high-frequency noise interference level of the second-order advance observer is determined according to a calculation result of the high-frequency noise power gain of the second-order advance observer. If the HFNPG isSOLOAnd (t) if the variation range of the second-order advanced observer is less than 10, judging that the high-frequency noise interference level of the second-order advanced observer is low. If the HFNPG isSOLOAnd (t) if the variation range of the second-order advanced observer is greater than or equal to 10, judging that the high noise interference level of the second-order advanced observer is higher.
In one embodiment, the transfer function of the second-order advance observer is:
SOLO(s)＝SOIIM(s)TOIF(s)
wherein, soiim(s) is a transfer function of the second-order inertial inverse model, and the formula is as follows:
wherein, TSOIIMIs the time constant of the second order inertial inverse model;
TOIF(s) is the transfer function of the third order inertial filter, and is given by:
wherein, TTOIFIs the time constant of the third order inertial filter.
In the present embodiment, the second order advanced observer structure is shown in fig. 4.
The second order advanced observer is expressed as
SOLO(s)＝SOIIM(s)TOIF(s),
Wherein s is a laplacian, solo(s) is a transfer function of the second order advance observer. SOIIM(s) is a transfer function of a Second Order Inertial Inverse Model (SOIIM). T isSOIIMIs the time constant of the second order inverse inertial model in seconds. TOIF(s) is the transfer function of a Third Order Inertial Filter (TOIF). T isTOIFIs the time constant of the third order inertial filter,the unit is seconds.
By ISSOLO(t) expressing the input signal of the second order advanced observer in dimensionless units, using OSSOLO(t) expressing the second order advanced observer output signal in dimensionless units.
In one embodiment, the structure and parameters of the high-pass filter a are the same as those of the high-pass filter B, and both the high-pass filter a and the high-pass filter B use second-order high-pass filters.
In this embodiment, the High pass filter A (HPF: A) and the High pass filter B (HPF: B) are
Wherein, A(s) is the transfer function of the high-pass filter A, and B(s) is the transfer function of the high-pass filter B. T isHPFIs a time constant common to the high pass filter a and the high pass filter B in seconds. The high-pass filter A and the high-pass filter B have the same structure and parameters, and both adopt a Second Order High Pass Filter (SOHPF) form.
The embodiment of the invention also provides an online measurement method of the noise interference level of the second-order advanced observer, which is applied to the online measurement device of the noise interference level of the second-order advanced observer in any embodiment, and the online measurement method comprises the following steps: acquiring an input signal of the second-order advanced observer, and acquiring a high-pass filtering signal A through a high-pass filter A;
acquiring an output signal of the second-order advanced observer, and acquiring a high-pass filtering signal B through a high-pass filter B;
and calculating noise power gain according to the high-pass filtering signal A and the high-pass filtering signal B to obtain the high-frequency noise power gain value.
In this embodiment, the parameters of the second-order advance observer are: t isSOIIM＝125s，TTOIF16 s. Setting a common time constant of the high-pass filter A and the high-pass filter B as follows: t isHPF30 s. Setting parameters of the high-frequency noise power gain calculation as follows: t isPL1000 s. And simulating a noise interference signal in an input signal of the second-order advanced observer by using a pseudo-random signal, wherein the output range of the pseudo-random signal is +/-0.01, and the unit is dimensionless.
The input signal of the second-order advance observer has a slope change, a slope change rate 1/1000s and a slope change time 1000s within a process time t of 3000 s-4000 s, and the purpose is to examine the influence of the change of the input signal of the second-order advance observer on the calculation result of the high-frequency noise power gain of the second-order advance observer. By ISSOLO(t) expressing the input signal of the second order lead observer in dimensionless units. By OSSOLO(t) expressing the second order advanced observer output signal in dimensionless units.
The simulation experiment result of the input signal of the second-order advanced observer is obtained at a digital discrete calculation interval of 1s, and is shown in fig. 5. The result of the simulation experiment of the output signal of the second-order advanced observer is shown in fig. 6. A comparison graph of simulation experiment results of the high-frequency noise power gain of the second-order advanced observer is obtained and is shown in fig. 7.
And at a given process time t ranging from 0 to 8000s, the simulation experiment value of the high-frequency noise power gain of the second-order advance observer varies in an interval of 41 to 61, and the interval variation range is larger than 10, so that the high-frequency noise interference level of the second-order advance observer is judged to be high. As can be seen from fig. 6, the slope change of the second-order advance observer input signal at the process time t of 3000s to 4000s has no significant influence on the calculation result of the high-frequency noise power gain of the second-order advance observer.
In one embodiment, the method further comprises the following steps: and judging the noise interference level of the second-order advance observer according to a preset threshold, judging that the noise interference level of the second-order advance observer is higher when the high-frequency noise power gain value is greater than or equal to the threshold, and judging that the noise interference level of the second-order advance observer is lower when the high-frequency noise power gain value is smaller than the threshold, wherein the threshold is 10.
In one embodiment, the performing the power noise gain calculation according to the input signal of the second order advance observer and the output signal of the second order advance observer includes:
carrying out square operation on the high-pass filtering signal A to obtain a result of square operation A, carrying out square operation on the high-pass filtering signal A subjected to pure hysteresis processing to obtain a result of square operation C, and carrying out difference algebraic operation on the result of square operation A and the result of square operation C to obtain a result of algebraic operation A;
performing integral operation on the result of the algebraic operation A to obtain an integral operation A result;
carrying out square operation on the high-pass filtering signal B to obtain a square operation B result, carrying out square operation on the high-pass filtering signal B subjected to pure hysteresis processing to obtain a square operation D result, and carrying out difference algebraic operation on the square operation B result and the square operation D result to obtain an algebraic operation B result;
performing integral operation on the result of the algebraic operation B to obtain a result of the integral operation B;
and performing division operation on the result of the integral operation A and the result of the integral operation B to obtain a high-frequency noise power gain value of the second-order advanced observer.
In one embodiment, the structure and parameters of the high-pass filter a are the same as those of the high-pass filter B, and both the high-pass filter a and the high-pass filter B use second-order high-pass filters.
For the specific definition of the online measurement method of the noise interference level of the second-order lead observer, reference may be made to the above definition, which is not described herein again. The respective modules in the above-described online measurement device of the noise interference level of the second-order advance observer may be wholly or partially implemented by software, hardware, and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
Referring to fig. 8, an embodiment of the invention provides a computer terminal device including one or more processors and a memory. A memory is coupled to the processor for storing one or more programs, which when executed by the one or more processors, cause the one or more processors to implement a method for online measurement of a noise disturbance level of a second order lead observer as in any of the embodiments described above.
The processor is used for controlling the overall operation of the computer terminal equipment so as to complete all or part of the steps of the online measurement method of the noise interference level of the second-order advance observer. The memory is used to store various types of data to support the operation at the computer terminal device, which data may include, for example, instructions for any application or method operating on the computer terminal device, as well as application-related data. The Memory may be implemented by any type of volatile or non-volatile Memory device or combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic Memory, flash Memory, magnetic disk, or optical disk.
In an exemplary embodiment, the computer terminal Device may be implemented by one or more Application Specific 1 integrated Circuit (AS 1C), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a controller, a microcontroller, a microprocessor or other electronic components, and is configured to perform the above-mentioned online measurement method of the noise interference level of the second order lead observer, and achieve technical effects consistent with the above-mentioned methods.
In another exemplary embodiment, there is also provided a computer readable storage medium comprising program instructions which, when executed by a processor, implement the steps of the method for online measurement of noise disturbance level of a second order lead observer in any of the above embodiments. For example, the computer readable storage medium may be the above memory including program instructions executable by a processor of a computer terminal device to perform the above method for online measurement of noise interference level of a second order lead observer, and to achieve the technical effects consistent with the above method.
In the device and the method for measuring the noise interference level of the second-order advance observer on line, a calculation result of the high-frequency noise power gain of the second-order advance observer is obtained through a series of calculations of a high-frequency noise signal in an output signal of the second-order advance observer and a high-frequency noise signal in an input signal of the second-order advance observer. The online measurement result of the high-frequency noise power gain of the second-order advance observer can be continuously given, the high-frequency noise interference level of the second-order advance observer is judged according to the online measurement result, the online measurement method has a good significance for guiding the online adjustment of the parameters of the second-order advance observer, and no influence is caused on the online work of the second-order advance observer.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (9)
1. An on-line measurement device of a noise interference level of a second-order advanced observer, comprising:
the high-pass filter A is connected with the input end of the second-order advanced observer and used for acquiring an input signal of the second-order advanced observer to obtain a high-pass filtering signal A; the input signal of the second-order advanced observer comprises an overheated steam temperature process response signal of the thermal power generating unit;
the high-pass filter B is connected with the output end of the second-order advanced observer and used for acquiring an output signal of the second-order advanced observer so as to obtain a high-pass filtering signal B;
the high-frequency noise power gain value calculation module is respectively connected with the output ends of the high-pass filter A and the high-pass filter B and is used for calculating the noise power gain according to the high-pass filtering signal A and the high-pass filtering signal B to obtain a high-frequency noise power gain value;
and the noise interference level judgment module is connected with the output end of the high-frequency noise power gain value calculation module and is used for judging the noise interference level of the second-order advance observer according to a preset threshold value, when the high-frequency noise power gain value is greater than or equal to the threshold value, the noise interference level of the second-order advance observer is judged to be higher, and when the high-frequency noise power gain value is less than the threshold value, the noise interference level of the second-order advance observer is judged to be lower.
2. The on-line measurement device of the noise interference level of the second-order advanced observer according to claim 1, wherein the high frequency noise power gain value calculation module comprises:
an algebraic operation A unit, configured to perform a square operation on the high-pass filtered signal A to obtain a result of the square operation A, perform a square operation on the high-pass filtered signal A after pure hysteresis processing to obtain a result of a square operation C, and perform a difference algebraic operation on the result of the square operation A and the result of the square operation C to obtain a result of the algebraic operation A;
the integral operation A unit is used for carrying out integral operation on the result of the algebraic operation A to obtain an integral operation A result;
an algebraic operation B unit, configured to perform a square operation on the high-pass filtered signal B to obtain a result of the square operation B, perform a square operation on the high-pass filtered signal B after pure hysteresis processing to obtain a result of a square operation D, and perform a difference algebraic operation on the result of the square operation B and the result of the square operation D to obtain a result of the algebraic operation B;
the integral operation B unit is used for carrying out integral operation on the result of the algebraic operation B to obtain an integral operation B result;
and the division operation unit is used for carrying out division operation on the result of the integral operation A and the result of the integral operation B to obtain a high-frequency noise power gain value of the second-order advanced observer.
3. The on-line measurement device of the noise disturbance level of the second-order advanced observer according to claim 1, wherein the preset threshold value is 10.
4. The on-line measurement device of the noise interference level of the second order advance observer according to claim 1, wherein the transfer function of the second order advance observer is:
SOLO(s)＝SOIIM(s)TOIF(s)
wherein, soiim(s) is a transfer function of the second-order inertial inverse model, and the formula is as follows:
SOIIM(s)＝(1+TSOIIMs)2
wherein, TSOIIMThe time constant of the second-order inertia inverse model is shown, and s is a Laplace operator;
TOIF(s) is the transfer function of the third order inertial filter, and is given by:
wherein, TTOIFIs the time constant of the third order inertial filter.
5. The on-line measurement device of the noise interference level of the second-order advanced observer according to claim 1, wherein the structure and parameters of the high-pass filter a are the same as those of the high-pass filter B, and the high-pass filter a and the high-pass filter B both use a second-order high-pass filter.
6. An online measurement method of a noise interference level of a second-order advanced observer, the online measurement method comprising:
acquiring an input signal of the second-order advanced observer, and acquiring a high-pass filtering signal A through a high-pass filter A; the input signal of the second-order advanced observer comprises an overheated steam temperature process response signal of the thermal power generating unit;
acquiring an output signal of the second-order advanced observer, and acquiring a high-pass filtering signal B through a high-pass filter B;
performing noise power gain calculation according to the high-pass filtering signal A and the high-pass filtering signal B to obtain a high-frequency noise power gain value;
and judging the noise interference level of the second-order advance observer according to a preset threshold, judging that the noise interference level of the second-order advance observer is higher when the high-frequency noise power gain value is greater than or equal to the threshold, and judging that the noise interference level of the second-order advance observer is lower when the high-frequency noise power gain value is smaller than the threshold.
7. The method for online measurement of the noise disturbance level of a second order advanced observer according to claim 6, further comprising:
the threshold is 10.
8. The method of online measurement of the noise interference level of a second order advance observer according to claim 6, wherein the performing of the power noise gain calculation according to the input signal of the second order advance observer and the output signal of the second order advance observer comprises:
carrying out square operation on the high-pass filtering signal A to obtain a square operation A result, carrying out square operation on the high-pass filtering signal A after pure lag processing to obtain a square operation C result, and carrying out difference algebraic operation on the square operation A result and the square operation C result to obtain an algebraic operation A result;
performing integral operation on the result of the algebraic operation A to obtain an integral operation A result;
carrying out square operation on the high-pass filtering signal B to obtain a square operation B result, carrying out square operation on the high-pass filtering signal B after pure lag processing to obtain a square operation D result, and carrying out difference algebraic operation on the square operation B result and the square operation D result to obtain an algebraic operation B result;
performing integral operation on the result of the algebraic operation B to obtain a result of the integral operation B;
and performing division operation on the result of the integral operation A and the result of the integral operation B to obtain a high-frequency noise power gain value of the second-order advanced observer.
9. The method for online measurement of the noise interference level of a second-order advanced observer according to claim 6, wherein the structure and parameters of the high-pass filter A are the same as those of the high-pass filter B, and the high-pass filter A and the high-pass filter B both use a second-order high-pass filter.
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