CN117433407A - Engine rotary transformer simulation waveform generation method and generation system - Google Patents
Engine rotary transformer simulation waveform generation method and generation system Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/30—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
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- G—PHYSICS
- G01—MEASURING; TESTING
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Abstract
The invention belongs to the field of sensing signal detection of aviation and gas turbine engines, and particularly relates to a simulation waveform generation method of an engine rotary transformer. According to the vibration signals, parameters of the filter are adjusted, the rotor winding excitation signals are preprocessed, and rotor winding excitation processing signals are obtained; integrating the rotor winding excitation processing signal to obtain an integrated signal, extracting the amplitude of the integrated signal to obtain a peak point of the integrated signal and a phase point corresponding to the peak point in the rotor winding excitation processing signal; acquiring signal frequency according to the peak point and acquiring signal initial phase according to the phase point and the adjacent point of the phase point; generating a rotor excitation simulation carrier signal according to the signal frequency and the signal initial phase, and generating a stator winding simulation signal according to the rotor excitation simulation carrier signal. The invention can realize high-precision following of the frequency and the phase of the excitation signal of the rotor winding.
Description
Technical Field
The invention belongs to the field of aviation and gas turbine engine sensing signal detection, and particularly relates to a method and a system for generating a simulation waveform of an engine rotary transformer.
Background
Sensors in numerical control systems for aeroengines and gas turbines can be broadly divided into two main categories, control and monitoring, according to their use, and comprise a large number of measuring and monitoring tasks for displacements and angles. The control type position and angle sensor collects all important control parameters and provides basis for the digital control system to output according to corresponding control rules and control algorithms.
The sine and cosine rotary transformer is a small AC motor for measuring angle, and is used to measure the angular displacement and angular speed of rotating shaft of rotating body. Comprising three windings, namely one rotor winding and two stator windings. The rotor winding rotates with the motor, the stator winding is fixed in position and the two stators are at an angle of 90 degrees to each other. In this way, the windings form a transformer with an angle dependent coefficient. A rotary transformer commonly used in motor systems belongs to a brushless rotary transformer and structurally comprises three windings, namely a rotor winding and two stator windings. The rotor winding rotates along with the tested rotating shaft, the stator winding is fixed in position, and the two stators are mutually at an angle of 90 degrees. In this way, the windings form a transformer with an angle dependent coefficient. The sinusoidal carrier applied to the rotor windings is coupled to the stator windings, and the stator winding output is amplitude modulated in dependence on the rotor winding angle. The angle position information of the motor can be obtained by demodulating the two signals, firstly, a pure sine wave and a cosine wave are received, then the pure sine wave and the cosine wave are divided to obtain the tangent value of the angle, and finally, the angle value is obtained through an arc tangent function.
Aiming at the application requirements of the sensor, the simulation test method and equipment for simulating the sensor with high simulation degree have higher static acquisition precision, and foreign products can be used as standard equipment for metering inspection, but have insufficient anti-interference capability in the severe environment of the airborne ends of the aero-engines and the gas turbines. Besides the lack of anti-interference capability, the domestic products are not ideal in precision performance and frequency and amplitude coverage of sensing signals.
Disclosure of Invention
The invention provides a method and a system for generating a simulation waveform of an engine rotary transformer, which can generate a rotor excitation simulation carrier signal with the same frequency and phase as an excitation signal and a stator winding simulation signal with superimposed sine and cosine envelopes synchronous with the carrier, realize high-precision following of the frequency and the phase of the rotor winding excitation signal of a rotary sensor, and are used for self-checking test of an onboard end of an engine controller, system function test in ground detection application and digital twin test of a sensor.
The technical scheme of the invention is as follows: an engine resolver simulation waveform generation method, comprising:
s10: acquiring a vibration signal of a vibration sensor and acquiring a rotor winding excitation signal applied to a rotary transformer;
s20: according to the vibration signal, parameters of a filter are adjusted, and the rotor winding excitation signal is preprocessed through the adjusted filter to obtain a rotor winding excitation processing signal;
s30: integrating the rotor winding excitation processing signal to obtain an integrated signal, extracting the amplitude of the integrated signal, and obtaining a peak point of the integrated signal and a phase point corresponding to the peak point in the rotor winding excitation processing signal;
s40: acquiring signal frequency according to the peak point, and acquiring signal initial phase according to the phase point and the adjacent point of the phase point in one period;
s50: generating a rotor excitation simulation carrier signal according to the signal frequency and the signal initial phase, and generating a stator winding simulation signal of sine and cosine envelope according to the rotor excitation simulation carrier signal.
Further, the adjusting the parameters of the filter according to the vibration signal includes:
performing spectrum analysis on the vibration signal to obtain vibration frequency band data;
acquiring filter bandwidth data and filter parameters according to the vibration frequency band data;
and adjusting the filter according to the filter bandwidth data and the filter parameters.
Further, the obtaining the signal frequency according to the peak point includes:
acquiring a clock period between peak points of two adjacent periods;
acquiring a clock cycle average value according to the continuous preset number of clock cycles;
and acquiring the signal frequency according to the clock period average value.
Further, the acquiring the initial phase of the signal according to the phase point and the adjacent point of the phase point in one period includes:
and acquiring a positive and negative sign change interval between the phase point and the adjacent point of the phase point in one period of the rotor winding excitation processing signal, wherein the midpoint of the positive and negative sign change interval is interpolated to be the initial phase of the signal.
Further, the acquiring a positive-negative sign change interval between the phase point and an adjacent point of the phase point within one period of the rotor winding excitation processing signal includes:
in one period of the rotor winding excitation processing signal, 1/4 point interpolation, 1/2 point interpolation and 3/4 point interpolation between the phase point and adjacent points of the phase point are obtained;
and acquiring the positive and negative signs of the phase points, the positive and negative signs of adjacent points, the positive and negative signs of 1/4 point interpolation, the positive and negative signs of 1/2 point interpolation and the positive and negative signs of 3/4 point interpolation, and selecting a section with the positive and negative signs changed as a phase discrimination section.
Further, the frequency of the rotor excitation simulation carrier signal is subjected to closed-loop control, so that an interval between a half-cycle zero-crossing point of the rotor excitation simulation carrier signal and the initial phase of the signal is located in the phase discrimination interval.
Further, the generating a stator winding simulation signal of a sine and cosine envelope according to the rotor excitation simulation carrier signal includes:
resampling the rotor excitation simulation carrier signal to generate a resampling value;
generating a rotation signal value of the sine and cosine envelope through a linear phase algorithm according to the resampling value;
and generating a stator winding simulation signal of the sine and cosine envelope according to the value of the rotation variation signal of the sine and cosine envelope.
Further, the generating the stator winding simulation signal of the sine and cosine envelope according to the value of the rotation variation signal of the sine and cosine envelope includes:
and D, performing digital-to-analog conversion and broadband amplification on the value of the rotary-varying signal of the sine-cosine envelope to generate a stator winding simulation signal of the sine-cosine envelope.
Another technical scheme of the invention is as follows: an engine resolver simulation waveform generation system, comprising: the vibration sensor, the rotor winding excitation module, the signal acquisition module and the signal processing module,
the vibration sensor is used for generating a vibration signal;
the rotor winding excitation module is used for generating a rotor winding excitation signal;
the vibration sensor and the rotor winding excitation module are respectively in communication connection with the signal acquisition module;
the signal acquisition module is used for carrying out preliminary processing on signals sent by the vibration sensor and the rotor winding excitation module;
the signal acquisition module is in communication connection with the signal processing module;
the signal processing module is used for executing the engine resolver simulation waveform generation method applicable to the engine.
Further, the signal acquisition module comprises a first amplifying demodulator, a second amplifying demodulator and an AD acquisition circuit;
the first amplification demodulator is connected with the vibration sensor, and the second amplification regulator is connected with the rotor winding excitation module.
The invention has the beneficial effects that: the invention monitors the frequency band of the vibration signal, adaptively adjusts the digital filtering bandwidth, and effectively suppresses external environment interference such as vibration; ensuring the precise following of the simulation waveform signal through integration and decomposition and primary waveform generation with closed-loop control; the two-stage high-precision waveform generation function is realized through an iterative algorithm with high iteration times, and rotor excitation simulation carrier signals with the same frequency and same phase as the excitation signals and stator winding simulation signals with superimposed sine and cosine envelopes synchronous with the carrier signals are generated.
Drawings
FIG. 1 is a flow chart of a method of generating a simulated waveform of an engine resolver according to the present invention.
FIG. 2 is a block diagram of a simulated waveform generation system for an engine resolver according to the present invention.
Fig. 3 is a digital waveform schematic of the rotor excitation simulation carrier and stator winding simulation signals of the present invention.
Fig. 4 is a diagram of PI control according to the present invention.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In one embodiment of the present invention, fig. 1 is a flowchart provided by a specific flow of a method for generating a simulation waveform of an engine resolver according to the present invention, and as shown in fig. 1, the specific flow of the present invention includes:
s10: a vibration signal of a vibration sensor is acquired and a rotor winding excitation signal applied to a resolver is acquired.
The tracked N-way resolver sensor rotor winding excitation signals may be acquired at 100kHz and above by a 16-bit and above multi-way analog-to-digital converter. In one embodiment, a 24-bit multi-path AD may be used, with a sampling rate of 500kHz and an N of 6.
To suppress the disturbance caused by vibration, vibration acceleration signals, i.e., vibration signals, from the intermediate case bearing or turbine bearing of the engine are collected.
S20: and adjusting parameters of the filter according to the vibration signal, and preprocessing the rotor winding excitation signal through the adjusted filter to obtain a rotor winding excitation processing signal.
And carrying out spectrum analysis on the vibration signal to obtain vibration frequency band data. After the vibration signal is obtained, the vibration signal is directly subjected to spectrum analysis or is matched with total calculation through a plurality of groups of band-pass filters, and vibration frequency band data are obtained.
And acquiring filter bandwidth data and filter parameters according to the vibration frequency band data. And adjusting the filter according to the bandwidth data of the filter and the parameters of the filter, so that the suppression capability of noise reduction pretreatment on vibration interference is improved.
After the vibration frequency band data is obtained, the filter bandwidth data and the filter parameters can be adaptively generated through an adaptive filtering algorithm according to the vibration frequency band data, and the filter bandwidth data and the filter parameters are arranged in the filter to complete the adjustment of the filter.
The filter is implemented as a high-order finite length unit impulse response FIR filter or an infinite impulse response digital IIR filter. When the filter is implemented as an IIR filter, the filter has a filtering order of no more than 18.
The filter processing procedure is as follows: in the ith path (i.e. [1,6 ]]) Sampling value v of rotor winding excitation signal i After obtaining, the self-adaptive band-pass filter is used for carrying out the pretreatment of blocking and noise reduction to obtain a filtered signal v * i 。
S30: and carrying out integral processing on the rotor winding excitation processing signal to obtain an integral signal, and carrying out amplitude extraction on the integral signal to obtain a peak point of the integral signal and a phase point corresponding to the peak point in the rotor winding excitation processing signal.
Wherein v is * i (i∈[1,6]) Through digital integration processing, a corresponding integration result u is obtained i The method comprises the steps of carrying out a first treatment on the surface of the Then, the peak point u of the integral result in a complete period is obtained through amplitude extraction peak And a phase point p corresponding to the peak point in the rotor winding excitation processing signal.
S40: and acquiring signal frequency according to the peak point, and acquiring signal initial phase according to the phase point and the adjacent point of the phase point in one period.
The step of obtaining the signal frequency according to the peak points comprises obtaining clock periods between the peak points of two adjacent periods, and obtaining a clock period average value according to the clock periods with continuous preset numbers. And acquiring the signal frequency according to the clock period average value.
The peak point obtained is used to provide a reference frequency for subsequent phase-locked control. The method specifically comprises the following steps: peak point u of two adjacent complete cycles peak The clock period between is T p2p Calculating the continuous preset number U T T of (2) p2p Mean of the period of (2)The inverse of the clock period mean value is the signal frequency, and the signal frequency is provided for the subsequent PI control unit. To facilitate subsequent execution of hardware division computations by shift operations, a predetermined number U T Is generally set to 2 m (m＝1,2,…)。
The step of obtaining the initial phase of the signal according to the phase point and the adjacent points of the phase point in one period comprises the following steps:
and acquiring a positive and negative sign change interval between the phase point and the adjacent point of the phase point in one period of the rotor winding excitation processing signal, wherein the midpoint of the positive and negative sign change interval is interpolated to be the initial phase of the signal.
The method comprises the following steps: the obtained phase point is used for determining the initial phase and phase discrimination interval of the signal.
The phase point p of the rotor winding excitation processing signal corresponding to the peak point of the integrated signal in any complete period and the adjacent point p+1 of the phase point have the following characteristics:
sign(v * p )·sign(v * p+1 )≤0
the phase detection interval needs to be further divided between the phase point p and the adjacent point p+1 of the phase point, and the following is an implementation of division: further determining 3 points and 1/4 point interpolation v * p+0.25 1/2 Point interpolation v * p+0.5 And 3/4 point interpolation v * p+0.75 . For this purpose, 1/4 point interpolation, 1/2 point interpolation and 3/4 point interpolation between the phase point and its adjacent point need to be obtained in one period of the rotor winding excitation processing signal, and the formulas are as follows:
the sign function can obtain the positive and negative signs of the phase points, the positive and negative signs of adjacent points, the positive and negative signs of 1/4 point interpolation, the positive and negative signs of 1/2 point interpolation and the positive and negative signs of 3/4 point interpolation.
According to v * p 、v * p+0.25 、v * p+0.5 、v * p+0.75 And v * p+1 The positive and negative sign change condition between the two is selected to be the interval of positive and negative sign change, defining the interval as a phase discrimination interval. And the middle point interpolation of the interval of the positive and negative sign change is a phase discrimination point, and the phase discrimination point is used as the initial phase of the signal.
For example, when sign (v * p+0.25 )·sign(v * p+0.5 ) When the phase difference is less than or equal to 0, the phase discrimination interval is [ p+0.25, p+0.5]The phase discrimination point is p+0.375, and the obtained phase discrimination point and phase discrimination interval are provided for PI closed loop control.
S50: generating a rotor excitation simulation carrier signal according to the signal frequency and the signal initial phase, and generating a stator winding simulation signal of sine and cosine envelope according to the rotor excitation simulation carrier signal.
The initial phase of the signal is the phase corresponding to the integral peak value, and the signal frequency is determined by the clock period mean value. The number of generated points in a single period is even, so that the existence of a half-period zero-crossing point p' is ensured. Specifically, according to the signal frequency and the signal initial phase, iteration is carried out for a plurality of times through an iteration algorithm, and a rotor excitation simulation carrier signal is generated. The step can be realized by a software program or a hardware module, and when the hardware module is adopted, a linear phase counting unit and a CODIC unit can be adopted, wherein the period duration of the linear phase counting unit can be adjusted, the upper counting limit is tau, and the CODIC unit is iterated for 29 times by single input, and has the numerical precision of 1 e-7. It should be noted that the amplitude of the rotor excitation simulation carrier signal can be determined by a skilled person according to the actual situation, and the cordic unit and the iterative algorithm are well known to those skilled in the art, so that the description thereof is omitted here.
As shown in fig. 4, when the rotor excitation simulation carrier signal is generated, PI closed-loop control needs to be performed on the frequency of the rotor excitation simulation carrier signal, so that an interval between a half-period zero-crossing point of the rotor excitation simulation carrier signal and a signal initial phase (phase discrimination point) is located in the phase discrimination interval, and therefore precise tracking of the rotor excitation simulation carrier signal on the rotor winding excitation signal is achieved.
And after the rotor excitation simulation carrier signal is generated, resampling the rotor excitation simulation carrier signal to generate a resampling value, and generating a sine-cosine envelope rotation-varying signal value through a linear phase algorithm according to the resampling value. And generating a stator winding simulation signal of the sine and cosine envelope according to the value of the rotation variation signal of the sine and cosine envelope.
The value of the rotation signal is a digital signal of the simulation signal of the stator winding. The generation of the rotation signal value can be realized by a software program or a hardware module, and when the hardware module is adopted, a linear phase counting unit and a CODIC unit can be adopted, wherein the period duration of the linear phase counting unit can be adjusted, the upper limit of the counting is mu, and mu > > tau needs to be met. The linear phase algorithm may be implemented by a linear phase counting unit, and both the linear phase counting unit and the linear phase counting algorithm are well known to those skilled in the art, and thus are not described herein.
After the values of the rotation signals are obtained, digital-to-analog conversion and broadband amplification are carried out on the values of the rotation signals of the sine and cosine envelopes, and then simulation signals of stator windings of the sine and cosine envelopes are generated, and the simulation signals are specifically shown in fig. 3.
The invention monitors the frequency band of the vibration signal, adaptively adjusts the digital filtering bandwidth, and effectively suppresses external environment interference such as vibration; ensuring the precise following of the simulation waveform signal through integration and decomposition and primary waveform generation with closed-loop control; the two-stage high-precision waveform generation function is realized through an iterative algorithm with high iteration times, and rotor excitation simulation carrier signals with the same frequency and same phase as the excitation signals and stator winding simulation signals with superimposed sine and cosine envelopes synchronous with the carrier signals are generated.
In one embodiment of the present invention, fig. 2 is a block diagram of a specific structure of an engine resolver simulation waveform generating system according to the present invention, and as shown in fig. 2, the present invention specifically includes: vibration sensor 1, rotor winding excitation module 2, signal acquisition module 3 and signal processing module 4.
Wherein the vibration sensor 1 is used for generating a vibration signal. Alternatively, the vibration sensor 1 may be implemented as an acceleration sensor.
The rotor winding excitation module 2 is configured to generate a rotor winding excitation signal. The rotor winding excitation signal is a signal applied to the motor resolver. The rotor winding excitation module 2 may be specifically implemented by FPGA or ASIC, and the rotor winding excitation module 2 is a conventional technical means in the art, so that details are not repeated herein.
The vibration sensor 1 and the rotor winding excitation module 2 are respectively in communication connection with the signal acquisition module 3. The signal acquisition module 3 is used for performing preliminary processing on signals sent by the vibration sensor 1 and the rotor winding excitation module 2.
The signal acquisition module 3 comprises a first amplification demodulator 31, a second amplification demodulator 32 and an AD acquisition circuit 33, wherein the first amplification demodulator 31 is connected with the vibration sensor 1, and the second amplification regulator is connected with the rotor winding excitation module 2. The first amplifying demodulator 31 and the second amplifying demodulator 32 each include a signal conditioning circuit, the AD acquisition circuit 33 is an analog-to-digital conversion circuit, and the signal conditioning circuit and the analog-to-digital conversion circuit are well known to those skilled in the art, and thus are not described herein. In one example, a 24-bit multi-pass AD chip LTC2368 is used to collect the 6-pass rotor winding excitation signals that are tracked, respectively, at a 500kHz sampling rate.
The signal acquisition module 3 is in communication connection with the signal processing module 4, where the signal processing module 4 is configured to execute any of the above-described engine resolver simulation waveform generation methods, and the signal processing module 4 is implemented as a field programmable gate array (Field Programmable Gate Array, FPGA) chip module, in which a processing program is built, and the processing program may be configured to execute a method applicable to engine resolver simulation waveform generation. In other embodiments of the present application, the signal processing module 4 may also be implemented as other modules such as a computer device, which is not limited to the actual implementation form of the signal processing module 4.
Specifically, the signal processing module 4 may include:
vibration signal processing unit 41: and the device is used for carrying out spectrum analysis on the vibration signal to obtain vibration frequency band data.
Adaptive filtering unit 42: and the filter is used for acquiring filter bandwidth data and filter parameters according to the vibration frequency band data, adjusting the filter according to the filter bandwidth data and the filter parameters, and preprocessing the rotor winding excitation signal through the adjusted filter to acquire a rotor winding excitation processing signal.
Integral and amplitude point frequency calculation unit 43: and the method is used for carrying out integral processing on the rotor winding excitation processing signal to obtain an integral signal, carrying out amplitude extraction on the integral signal, and obtaining a peak point of the integral signal and a phase point corresponding to the peak point in the rotor winding excitation processing signal. And according to the peak point, obtaining the signal frequency
Phase detection point interpolation unit 44: and the method is used for acquiring the initial phase of the signal according to the phase point and the adjacent points of the phase point in one period.
PI control and signal generation section 45: and the device is used for generating a rotor excitation simulation carrier signal according to the signal frequency and the signal initial phase, and performing PI closed-loop control on the frequency of the rotor excitation simulation carrier signal.
The rotation number value generation unit 46: and the method is used for resampling the rotor excitation simulation carrier signal to generate a resampled value, and generating a rotation signal value of a sine and cosine envelope through a linear phase algorithm according to the resampled value.
Rotation speed signal generation unit 47: and the stator winding simulation signal used for generating the sine and cosine envelope according to the value of the sine and cosine envelope. The rotation speed signal generating unit may be implemented using a DA converter 471 and an isolation driver 472. The rotation speed signal generating unit receives the rotation signal value output by the generating unit, controls the DA to convert into corresponding analog waveforms, and realizes the broadband amplifying function through the isolated broadband voltage and broadband driving module. Meanwhile, the output signal is evaluated and compared with a reference result after being matched with ADC sampling by an isolated buffer module, so that closed-loop sampling evaluation and load adjustment rate adjustment are realized, output simulation precision is controlled, and output amplitude precision is better than 0.1% FS. The isolation of various simulation test vector output signals to a power supply, an output and an internal calculation control circuit ensures that the acquisition precision is not influenced by the interference of the motherboard.
The above units may be implemented by software programs, hardware circuits, or a combination of hardware and software, and thus are not limited thereto.
In an alternative embodiment, as shown in FIG. 2, the system further comprises a master computer device. The signal processing module 4 is in communication with a host computer device. In one example, the host computer device has an application program thereon, the application program is configured with a display interface, and the signal processing module 4 outputs the measurement to the computer device, and the computer device accurately displays the measurement result through the application program.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all such modifications and equivalents are intended to be encompassed in the scope of the claims of the present invention.
Claims (10)
1. An engine resolver simulation waveform generation method, comprising:
s10: acquiring a vibration signal of a vibration sensor and acquiring a rotor winding excitation signal applied to a rotary transformer;
s20: according to the vibration signal, parameters of a filter are adjusted, and the rotor winding excitation signal is preprocessed through the adjusted filter to obtain a rotor winding excitation processing signal;
s30: integrating the rotor winding excitation processing signal to obtain an integrated signal, extracting the amplitude of the integrated signal, and obtaining a peak point of the integrated signal and a phase point corresponding to the peak point in the rotor winding excitation processing signal;
s40: acquiring signal frequency according to the peak point, and acquiring signal initial phase according to the phase point and the adjacent point of the phase point in one period;
s50: generating a rotor excitation simulation carrier signal according to the signal frequency and the signal initial phase, and generating a stator winding simulation signal of sine and cosine envelope according to the rotor excitation simulation carrier signal.
2. The engine resolver simulation waveform generation method according to claim 1, wherein the adjusting parameters of the filter based on the vibration signal includes:
performing spectrum analysis on the vibration signal to obtain vibration frequency band data;
acquiring filter bandwidth data and filter parameters according to the vibration frequency band data;
and adjusting the filter according to the filter bandwidth data and the filter parameters.
3. The engine resolver simulation waveform generation method according to claim 1, wherein the acquiring a signal frequency from the peak point includes:
acquiring a clock period between peak points of two adjacent periods;
acquiring a clock cycle average value according to the continuous preset number of clock cycles;
and acquiring the signal frequency according to the clock period average value.
4. The engine resolver simulation waveform generation method according to claim 1, wherein the acquiring the initial phase of the signal from the phase point and the adjacent points of the phase point in one cycle includes:
and acquiring a positive and negative sign change interval between the phase point and the adjacent point of the phase point in one period of the rotor winding excitation processing signal, wherein the midpoint of the positive and negative sign change interval is interpolated to be the initial phase of the signal.
5. The engine resolver simulation waveform generation method according to claim 4, wherein the acquiring the interval of the positive-negative sign change between the phase point and the adjacent points of the phase point within one period of the rotor winding excitation processing signal includes:
in one period of the rotor winding excitation processing signal, 1/4 point interpolation, 1/2 point interpolation and 3/4 point interpolation between the phase point and adjacent points of the phase point are obtained;
and acquiring the positive and negative signs of the phase points, the positive and negative signs of adjacent points, the positive and negative signs of 1/4 point interpolation, the positive and negative signs of 1/2 point interpolation and the positive and negative signs of 3/4 point interpolation, and selecting a section with the positive and negative signs changed as a phase discrimination section.
6. The engine resolver simulation waveform generation method of claim 4, wherein the frequency of the rotor excitation simulation carrier signal is closed-loop controlled so that an interval of a half-cycle zero-crossing point of the rotor excitation simulation carrier signal and a signal initial phase is located within the phase discrimination interval.
7. The engine resolver simulation waveform generation method of claim 1, wherein the generating a stator winding simulation signal of a sine and cosine envelope from the rotor excitation simulation carrier signal includes:
resampling the rotor excitation simulation carrier signal to generate a resampling value;
generating a rotation signal value of the sine and cosine envelope through a linear phase algorithm according to the resampling value;
and generating a stator winding simulation signal of the sine and cosine envelope according to the value of the rotation variation signal of the sine and cosine envelope.
8. The engine resolver simulation waveform generation method of claim 7, wherein the generating a stator winding simulation signal of a sine and cosine envelope from the values of the resolver signal of the sine and cosine envelope includes:
and D, performing digital-to-analog conversion and broadband amplification on the value of the rotary-varying signal of the sine-cosine envelope to generate a stator winding simulation signal of the sine-cosine envelope.
9. An engine resolver simulation waveform generation system, comprising: the vibration sensor, the rotor winding excitation module, the signal acquisition module and the signal processing module,
the vibration sensor is used for generating a vibration signal;
the rotor winding excitation module is used for generating a rotor winding excitation signal;
the vibration sensor and the rotor winding excitation module are respectively in communication connection with the signal acquisition module;
the signal acquisition module is used for carrying out preliminary processing on signals sent by the vibration sensor and the rotor winding excitation module;
the signal acquisition module is in communication connection with the signal processing module;
wherein the signal processing module is configured to execute the engine resolver simulation waveform generation method for an engine according to any one of claims 1 to 8.
10. The equal phase resampling demodulation system for an engine of claim 9, wherein said signal acquisition module comprises a first amplification demodulator, a second amplification demodulator, and an AD acquisition circuit;
the first amplification demodulator is connected with the vibration sensor, and the second amplification regulator is connected with the rotor winding excitation module.
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