CN111964583B - Motor vibration displacement estimation method, device and medium - Google Patents
Motor vibration displacement estimation method, device and medium Download PDFInfo
- Publication number
- CN111964583B CN111964583B CN202010653221.4A CN202010653221A CN111964583B CN 111964583 B CN111964583 B CN 111964583B CN 202010653221 A CN202010653221 A CN 202010653221A CN 111964583 B CN111964583 B CN 111964583B
- Authority
- CN
- China
- Prior art keywords
- acceleration
- function
- displacement
- waveform
- vibration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention provides a motor vibration displacement estimation method, which is characterized by comprising the following steps: providing a motor monomer for vibration; applying an excitation signal comprising preset frequency to the motor monomer to generate at least vibration displacement and vibration acceleration; collecting a time domain acceleration waveform of the vibration acceleration; converting the time domain acceleration waveform into a frequency domain acceleration function through Fourier transform; and calculating a frequency domain displacement function of the vibration displacement according to the frequency domain acceleration function of the vibration acceleration and the preset frequency of the excitation signal. By collecting the time domain acceleration waveform, converting the time domain acceleration waveform into a frequency domain acceleration function through Fourier transform, and then calculating and acquiring the frequency domain displacement function of the motor monomer by using the frequency domain acceleration function and the preset frequency, the more accurate motor vibration displacement can be estimated more simply and conveniently.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of automatic control, in particular to a method, a device and a medium for estimating motor vibration displacement.
[ background of the invention ]
With the development and popularization of various consumer electronic devices such as smart phones and smart wearing devices, the requirement of people on touch experience is increasing day by day. Currently, the main haptic feedback technology is achieved by providing a rich vibration sensation through a linear motor (LRA), so the vibration performance of the motor has a direct and large impact on the haptic experience.
The motor serves as a core providing device for tactile feedback, and generally speaking, the vibration displacement of the motor is used as a perception index for the vibration intensity. The laboratory usually adopts the laser displacement sensor of high accuracy to measure the vibration displacement of motor, but the test procedure is complicated, and the precision requires highly. In computer simulation, a physical model of the displacement from an excitation signal to a vibrator is usually established according to the physical characteristics of a motor, and the time domain displacement waveform of any signal is calculated according to the model. Therefore, it is difficult to directly acquire the vibration displacement of the motor, and nowadays, there is also a way to indirectly acquire the vibration displacement by detecting the vibration acceleration of the motor, and the time domain displacement is acquired by performing quadratic integration through the time domain acceleration that can be directly measured by the acceleration sensor, however, the result has a large error due to noise interference.
Therefore, it is necessary to provide an accurate and simple method for estimating the vibration displacement of the motor.
[ summary of the invention ]
The present invention provides a method, an apparatus and a medium for estimating a vibration displacement of a motor, which aims to provide a more accurate and simple estimation of the vibration displacement of the motor.
The technical scheme of the invention is as follows: a method for estimating vibration displacement of a motor, the method comprising the steps of:
providing a motor monomer for vibration;
applying an excitation signal comprising preset frequency to the motor monomer to generate at least vibration displacement and vibration acceleration;
collecting a time domain acceleration waveform of the vibration acceleration;
converting the time domain acceleration waveform into a frequency domain acceleration function through Fourier transform;
and calculating a frequency domain displacement function of the vibration displacement according to the frequency domain acceleration function of the vibration acceleration and the preset frequency of the excitation signal.
More preferably, the frequency domain displacement function of the motor cell is defined as a function of time t: x (t), the frequency domain acceleration function being a function of time t: a (t), and satisfies the relation:
More preferably, the function expression of the frequency domain displacement function is:
x (t) ═ Ksin ω t, where K is an inherent integral constant.
More preferably, the function expression of the frequency domain acceleration function is:
A(t)＝-Kω2sinωt，where K is an inherent integral constant.
Preferably, the time domain acceleration waveform at least comprises a direct current component caused by noise interference, and the direct current component in the time domain acceleration waveform is removed before the time domain acceleration is converted into the frequency domain acceleration through fourier transform.
More preferably, the direct current component is defined with respect to time tiFunction of (c): a (t)i) And satisfies the relation:
a(ti) Equal to epsilon; wherein epsilon is an inherent integral constant;
and zeroing the direct current component through Fourier transform to remove the direct current component in the time domain acceleration.
Preferably, the frequency domain displacement function is converted into a time domain displacement waveform by inverse fourier transform.
Preferably, the time domain displacement waveform comprises a waveform baseline and a plurality of trend terms deviating from the waveform baseline.
Preferably, the time domain displacement waveform is filtered to remove a number of trend terms that deviate more from a baseline.
An apparatus for acquiring a time domain acceleration waveform as described in any of the above, the apparatus comprising: the device comprises a cavernous body for isolating external vibration, a tool arranged on the cavernous body, a motor monomer arranged on the tool, an acceleration sensor arranged on the motor monomer, a signal acquisition amplifier electrically connected with the acceleration sensor, a signal converter electrically connected with the signal acquisition amplifier and used for converting a digital signal and an analog signal into each other, a computer end electrically connected with the signal converter and used for generating a time domain acceleration waveform, and a power amplifier respectively electrically connected with the motor monomer and the signal converter and used for outputting an excitation signal with preset frequency.
A computer-readable storage medium storing a computer program which, when executed, implements any of the motor vibration displacement estimation methods described above.
The invention has the beneficial effects that: by collecting the time domain acceleration waveform, converting the time domain acceleration waveform into a frequency domain acceleration function through Fourier transform, and then calculating and acquiring the frequency domain displacement function of the motor monomer by using the frequency domain acceleration function and the preset frequency, the more accurate motor vibration displacement can be estimated more simply and conveniently.
[ description of the drawings ]
FIG. 1 is a schematic flow chart of a method according to a first embodiment of the present invention;
FIG. 2 is a time domain integration waveform diagram of displacement, velocity and acceleration according to an embodiment of the present invention;
FIG. 3 is a frequency domain integrated waveform of displacement, velocity and acceleration according to an embodiment of the present invention;
fig. 4 is a schematic diagram of the device according to the third embodiment of the present invention.
[ detailed description ] embodiments
The invention is further explained with reference to the drawings and the embodiments.
Example one
In this embodiment, a method for estimating a vibration displacement of a motor is provided, referring to fig. 1, the method includes:
step S10: providing a motor unit 30;
preferably, the motor unit 30 is used for vibration, the motor unit 30 of the present embodiment is disposed on a tool 20, and an acceleration sensor 40 is disposed on the motor unit 30 for detecting vibration acceleration.
Step S20: applying an excitation signal including a predetermined frequency to the motor unit 30 to generate at least a vibration displacement and a vibration acceleration;
specifically, in the present embodiment, the motor unit 30 is electrically connected to the power amplifier 80, and the power amplifier 80 applies an excitation signal to the motor unit 30, where the excitation signal is a single-frequency excitation signal with a preset frequency set by a user, the preset frequency is defined as ω,
preferably, the motor unit 30 vibrates under the driving of the excitation signal, the vibration at least generates a vibration displacement and a vibration acceleration, a time domain waveform of the vibration displacement is difficult to directly measure, and a time domain waveform of the vibration acceleration is easy to measure.
Step S30: collecting a time domain acceleration waveform of the vibration acceleration;
preferably, the acceleration sensor 40 directly acquires a time-domain acceleration waveform of the vibration acceleration, where the time-domain acceleration waveform refers to a waveform diagram of the vibration acceleration as a function of time t, in this embodiment, the acceleration signal acquired by the acceleration sensor 40 is an analog signal, the acceleration sensor 40 is connected to the signal acquisition amplifier 50, the signal acquisition amplifier 50 is electrically connected to the signal converter 60, the signal converter 60 is configured to convert a digital signal and an analog signal into each other, the analog signal is amplified by the signal acquisition amplifier 50 and then converted into a digital signal by the signal converter, the signal converter 60 is electrically connected to the computer terminal 70, and the digital signal generates the acceleration signal into a waveform diagram as a function of time t at the computer terminal 70.
Step S40: removing a direct current component in the time domain acceleration waveform;
preferably, the time domain acceleration at least comprises a direct current component caused by noise interference, and the direct current component in the time domain acceleration waveform is removed before the time domain acceleration is converted into the frequency domain acceleration through Fourier transform. In this embodiment, the removal of the dc component is performed by the well-known MATLAB algorithm, and for a sinusoidal signal a (t), the method for removing the dc component of the signal by the MATLAB is a (t) -mean (a (t)).
More preferably, the direct current component is defined with respect to time tiFunction of (c): a (t)i) And satisfies the relation:
a(ti)＝ε
wherein the dc component is a constant independent of time.
And (3) obtaining by primary integration:
where v1 represents a velocity variable.
And (4) secondary integration is carried out:
wherein epsilon, sigma and eta are respectively inherent integral constants; specifically, the dc component is zeroed out by fourier transform to remove the dc component in the time domain acceleration.
Step S50: converting the time domain acceleration waveform into a frequency domain acceleration function through Fourier transform;
specifically, the time domain acceleration waveform is converted into a frequency domain acceleration function, and the data signal collected by the acceleration sensor 40 is a time domain function waveform with respect to time, and can be converted into a frequency domain function waveform with a preset frequency by using a fourier transform formula.
More preferably, the frequency domain acceleration function is defined as a function of time t: a (t), the function expression of the frequency domain acceleration function A (t) is:
A(t)＝-Kω2sinωt
wherein, K is an inherent integral constant, K is an amplitude value of a sine function, and is a corresponding amplitude value of displacement and is a representation form of the amplitude; ω is the preset frequency of the excitation signal.
It is understood that the fourier transform expresses a certain function satisfying a certain condition as a trigonometric function (sine and/or cosine function) or a linear combination of their integrals by a well-known fourier transform formula, which is a well-known mathematical tool, and the present embodiment does not expand a specific fourier transform process.
Step S60: calculating a frequency domain displacement function of the vibration displacement according to the frequency domain acceleration function of the vibration acceleration and the preset frequency of the excitation signal;
specifically, a frequency domain displacement function is calculated according to the frequency domain acceleration function and a preset frequency,
more preferably, the frequency domain displacement function of the motor cell 30 is defined as a function of time t: x (t), the function expression of the frequency domain displacement function X (t) is:
X(t)＝Ksinωt
where K is an inherent integral constant and ω is a predetermined frequency of the excitation signal.
Calculating a frequency domain displacement function x (t) according to the following relation:
where ω is a predetermined frequency of the excitation signal and A (t) is a function of the frequency domain acceleration with respect to time t.
Step S70: and converting the frequency domain displacement function into a time domain displacement waveform through Fourier inverse transformation.
Specifically, the frequency domain displacement function is converted into a time domain displacement waveform by using a function in an MATLAB based on actually measured acceleration, the time domain displacement waveform comprises a waveform baseline and a plurality of trend items deviating from the waveform baseline, the waveform baseline refers to a virtual straight line capable of expressing the trend of the large potential of the waveform in the function waveform, the process of changing the deviation baseline along with time is called as a trend item of a signal, and the time domain displacement waveform is filtered after the time domain displacement waveform is obtained so as to remove the plurality of trend items deviating from the baseline in a larger way.
In order to embody that the method for obtaining the vibration displacement through the frequency domain acceleration of the present invention is more accurate than the conventional method for obtaining the vibration displacement through the time domain acceleration, refer to fig. 2 for a time domain integral waveform diagram of the displacement, the velocity and the acceleration, fig. 3 for a frequency domain integral waveform diagram of the displacement, the velocity and the acceleration, an original signal in fig. 2 and fig. 3 is an actually measured signal of the displacement, the velocity and the acceleration signals directly obtained through the laser displacement sensor, the velocity sensor and the acceleration sensor 40, and a recovered signal is an analog signal of the displacement, the velocity and the acceleration signals estimated by the method of the present embodiment. By comparison, the vibration displacement signal obtained by frequency domain integration has better coincidence with the original displacement signal.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
Example two
The second embodiment provides an apparatus 100 for acquiring the time domain acceleration waveform according to the first embodiment, referring to fig. 4, the apparatus 100 includes: the device comprises a sponge body 10, a tool 20, a motor unit 30, an acceleration sensor 40, a signal acquisition amplifier 50, a signal converter 60, a computer end 70 and a power amplifier 80.
Preferably, the sponge body 10 is configured to isolate external vibration, the fixture 20 is disposed on the sponge body 10, the motor unit 30 is disposed on the fixture 20, the acceleration sensor 40 is disposed on the motor unit 30 and configured to collect vibration acceleration of the motor unit 30, the signal collection amplifier 50 is electrically connected to the acceleration sensor 40, the signal converter 60 is electrically connected to the signal collection amplifier 50, the signal converter 60 is configured to realize interconversion between a digital signal and an analog signal, the computer terminal 70 is electrically connected to the signal converter 60, the computer terminal 70 generates a function waveform diagram from an input digital signal, the power amplifier 80 is electrically connected to the motor unit 30 and the signal converter 60, and the power amplifier 80 is configured to output an excitation signal with a preset frequency.
EXAMPLE III
The present embodiment provides a computer-readable storage medium, which stores a computer program, when executed, implementing the motor vibration displacement estimation method according to an embodiment.
In particular, the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.
Therefore, by acquiring the time domain acceleration waveform, converting the time domain acceleration waveform into a frequency domain acceleration function through Fourier transformation, and calculating and acquiring the frequency domain displacement function of the motor monomer 30 by using the frequency domain acceleration function and the preset frequency, more accurate motor vibration displacement can be estimated more simply and conveniently.
While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.
Claims (8)
1. A method for estimating vibration displacement of a motor, the method comprising the steps of:
providing a motor monomer for vibration;
applying an excitation signal comprising preset frequency to the motor monomer to generate at least vibration displacement and vibration acceleration;
collecting a time domain acceleration waveform of the vibration acceleration;
converting the time domain acceleration waveform into a frequency domain acceleration function through Fourier transform;
calculating a frequency domain displacement function of the vibration displacement according to the frequency domain acceleration function of the vibration acceleration and the preset frequency of the excitation signal;
defining a frequency domain displacement function of the motor cell as a function of time t: x (t), the frequency domain acceleration function being a function of time t: a (t), and satisfies the relation:
the functional expression of the frequency domain displacement function is as follows:
x (t) K sin ω t, where K is an inherent integral constant;
the functional expression of the frequency domain acceleration function is as follows:
A(t)＝-Kω2sin ω t, where K is an inherent integral constant.
2. The method according to claim 1, wherein the time-domain acceleration waveform at least comprises a dc component caused by noise interference, and the dc component in the time-domain acceleration waveform is removed before the time-domain acceleration is converted into the frequency-domain acceleration by fourier transform.
3. The method according to claim 2, wherein the DC component is defined with respect to time tiFunction of (c): a (t)i) And satisfies the relation:
a(ti) Equal to epsilon; wherein epsilon is an inherent integral constant;
and zeroing the direct current component through Fourier transform to remove the direct current component in the time domain acceleration.
4. The method of claim 3, wherein the frequency domain displacement function is transformed into a time domain displacement waveform by inverse Fourier transform.
5. The method according to claim 4, wherein the time-domain displacement waveform comprises a waveform baseline and a plurality of trend terms deviating from the waveform baseline.
6. The method of claim 5, wherein the time-domain displacement waveform is filtered to remove a plurality of trend terms from a baseline.
7. An estimation device for implementing the motor vibration displacement estimation method according to any one of claims 1 to 6, comprising a device for acquiring the time-domain acceleration waveform, wherein the device for acquiring the time-domain acceleration waveform comprises: the device comprises a cavernous body used for isolating external vibration, a tool arranged on the cavernous body, a motor monomer arranged on the tool, an acceleration sensor arranged on the motor monomer, a signal acquisition amplifier electrically connected with the acceleration sensor, a signal converter electrically connected with the signal acquisition amplifier and used for converting a digital signal and an analog signal into each other, a computer end electrically connected with the signal converter and used for generating a time domain acceleration waveform, and a power amplifier respectively electrically connected with the motor monomer and the signal converter and used for outputting an excitation signal with a preset frequency.
8. A computer-readable storage medium storing a computer program, wherein the computer program is executed to implement the method for estimating vibration displacement of a motor according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010653221.4A CN111964583B (en) | 2020-07-08 | 2020-07-08 | Motor vibration displacement estimation method, device and medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010653221.4A CN111964583B (en) | 2020-07-08 | 2020-07-08 | Motor vibration displacement estimation method, device and medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111964583A CN111964583A (en) | 2020-11-20 |
| CN111964583B true CN111964583B (en) | 2022-05-27 |
Family
ID=73361407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010653221.4A Active CN111964583B (en) | 2020-07-08 | 2020-07-08 | Motor vibration displacement estimation method, device and medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111964583B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112491323B (en) * | 2020-11-27 | 2022-04-26 | 瑞声新能源发展(常州)有限公司科教城分公司 | Linear motor over-stroke control method and device, computer equipment and storage medium |
| CN113405467B (en) * | 2021-06-21 | 2022-08-02 | 西南交通大学 | Method for eliminating absolute measurement drift of accelerometer |
| CN116341169B (en) * | 2021-12-24 | 2024-08-06 | 武汉市聚芯微电子有限责任公司 | Design method and device for motor driving waveform |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203414278U (en) * | 2013-08-23 | 2014-01-29 | 中国水利水电科学研究院 | System for detecting abnormal condition of vibration of hydroelectric generating set in real time |
| CN107321948A (en) * | 2017-06-13 | 2017-11-07 | 燕山大学 | The fault tolerant control and method of a kind of continuous cast mold non-sinusoidal oscillation of servomotor driving |
| JP6420885B1 (en) * | 2017-11-29 | 2018-11-07 | Ｊｆｅアドバンテック株式会社 | Method for removing electromagnetic vibration component, diagnostic method for rotating machine, and diagnostic device for rotating machine |
| CN110657935A (en) * | 2019-09-24 | 2020-01-07 | 浙江大学 | Seismic wave acceleration integral processing method and system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100561162C (en) * | 2007-07-20 | 2009-11-18 | 广州市计量检测技术研究院 | A kind of virtual oscillating table detection signal processing method and equipment thereof |
| TWI474023B (en) * | 2008-12-10 | 2015-02-21 | Ind Tech Res Inst | Diagnosis method for diagnosing fault in operation of a motor fault and diagnosis device using the same |
| CN103292892B (en) * | 2012-08-09 | 2015-04-08 | 北京中元瑞讯科技有限公司 | Method and device for measuring low-frequency and small-range vibration signals |
| CN103217266A (en) * | 2013-03-27 | 2013-07-24 | 清华大学 | System and method for synchronously acquiring load and response signals of machine tool vibration test |
| CN106323451B (en) * | 2015-06-26 | 2019-10-11 | 陕西重型汽车有限公司 | The method and device thereof of displacement signal are obtained by acceleration signals |
| CN106524967B (en) * | 2016-11-07 | 2019-08-02 | 重庆理工大学 | A kind of automobile core wheel actual travel displacement measurement and extracting method |
| CN107014480B (en) * | 2017-01-24 | 2019-09-13 | 瑞声科技(新加坡)有限公司 | Linear motor displacement amplitude detection method and detection device |
-
2020
- 2020-07-08 CN CN202010653221.4A patent/CN111964583B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203414278U (en) * | 2013-08-23 | 2014-01-29 | 中国水利水电科学研究院 | System for detecting abnormal condition of vibration of hydroelectric generating set in real time |
| CN107321948A (en) * | 2017-06-13 | 2017-11-07 | 燕山大学 | The fault tolerant control and method of a kind of continuous cast mold non-sinusoidal oscillation of servomotor driving |
| JP6420885B1 (en) * | 2017-11-29 | 2018-11-07 | Ｊｆｅアドバンテック株式会社 | Method for removing electromagnetic vibration component, diagnostic method for rotating machine, and diagnostic device for rotating machine |
| CN110657935A (en) * | 2019-09-24 | 2020-01-07 | 浙江大学 | Seismic wave acceleration integral processing method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111964583A (en) | 2020-11-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111964583B (en) | Motor vibration displacement estimation method, device and medium | |
| Dalir et al. | Applications of fractional calculus | |
| CN110086403B (en) | Motor driving signal setting method, electronic device and storage medium | |
| CN112506341B (en) | Vibration effect generation method and device, terminal equipment and storage medium | |
| CN110247631B (en) | Motor nonlinear distortion compensation method and device | |
| CN109559758B (en) | Method for converting texture image into tactile signal based on deep learning | |
| CN102970647B (en) | Simulating calculation method for nonlinear characteristics in loudspeaker vibration | |
| CN111551848A (en) | Motor experience distortion index testing method, electronic equipment and storage medium | |
| CN104050147B (en) | Time-domain signal is converted into into the method and system of frequency-region signal | |
| CN110907827B (en) | Motor transient distortion measuring method and system | |
| CN111106783A (en) | Signal manufacturing method, signal manufacturing device, vibration motor and touch screen equipment | |
| CN116861221A (en) | Underdetermined working mode parameter identification method, device, equipment and medium | |
| WO2022006788A1 (en) | Estimation method for motor vibratory displacement, apparatus, and medium | |
| Yi et al. | A novel technique for fundamental and harmonic parameter estimation using nonergodic $ S $-transform | |
| CN111044962A (en) | Bandwidth flatness calibration method based on FFT | |
| CN114184270A (en) | Equipment vibration data processing method, device, equipment and storage medium | |
| Layer et al. | Signal transforms in dynamic measurements | |
| Pujari et al. | Design & implementation of FIR filters using on-board ADC-DAC & FPGA | |
| CN1062793A (en) | Fast signal spectrum analytical method | |
| CN109347455A (en) | Graphene resonant mode analog-digital converter | |
| US9268745B2 (en) | Method for fast wavelet transform of a signal | |
| CN111539089A (en) | Motor nonlinear model judgment method and system | |
| CN116316706B (en) | Oscillation positioning method and system based on complementary average inherent time scale decomposition | |
| CN112735453B (en) | Audio signal processing method and device | |
| CN118399959B (en) | Data processing method of system function, electronic equipment and storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |