A method and device for correcting over-limit points of measured data
By correcting and reconstructing the measured data in the turntable device, the problem that the turntable cannot fully reproduce the exceeded limit points in the measured data of the inertial components is solved, and the data reproducibility and accuracy of motion simulation experiments are improved.
Patent Information
- Application Number
- CN202210314119.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-03-28
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2042-03-28
AI Technical Summary
The existing turntable equipment cannot fully reproduce the limit points in the actual measured data of inertial components, resulting in the working conditions of the motion simulation test being unable to be close to the actual working conditions as much as possible.
By judging the limit points in the measured data, the preprocessed band containing the limit points are selected, and they are divided into reserved bands, buffer zone bands and limit zone bands according to their association relationship with the limit points. The buffer zone band is corrected, the overlimit zone band is rebuilt, and the retained band is spliced with the revised buffer zone band and the rebuilt overlimit zone band until no overlimit points are found.
Without affecting the waveform characteristics, the reproducibility of the measured data is improved, so that the turntable can reproduce the motion data of the inertial components more accurately.
Smart Images
Figure CN114707117B_ABST
Abstract
Description
Technical Field
[0001] This application claims protection for a data processing technology, particularly relating to a method for correcting overlimit points of measured data. This application also relates to an apparatus for correcting overlimit points of measured data. Background Art
[0002] A turntable is a device for conducting motion simulation tests on inertial components, mainly applied in fields such as aviation, aerospace, shipbuilding, and automotive, and can provide a land test environment for inertial components.
[0003] Currently, with the rapid development of inertial component technology, the working conditions of motion simulation tests must be as close as possible to the actual usage conditions of inertial components. It is required that the turntable has the ability to reproduce the motion data model measured from the inertial component carrier. However, due to the limitations of the turntable's own capabilities, the overlimit amplitudes in the measured data cannot be fully reproduced. Summary of the Invention
[0004] To solve the above problems in the prior art, this application provides a method for correcting overlimit points of measured data. This application also relates to an apparatus for correcting overlimit points of measured data.
[0005] This application also provides a method for correcting overlimit points in the reproduction of measured data by a turntable, including:
[0006] S1 Determine the overlimit points in the measured data, and filter the measured data based on the overlimit points to obtain a preprocessing band containing the overlimit points;
[0007] S2 In the preprocessing band, divide the preprocessing band into a reserved band, a buffer zone band, and an overlimit zone band according to the association relationship with the overlimit points;
[0008] S3 Correct the buffer zone band and reconstruct the overlimit zone band, and splice the reserved band with the corrected buffer zone band and the reconstructed overlimit zone band to obtain a spliced band;
[0009] S4 Determine the smoothness and overlimit points in the spliced band, and repeat the steps of S1 to S3 until no overlimit points are found.
[0010] Optionally, the overlimit points include: swing amplitude data exceeding the reproducible range of the turntable.
[0011] Optionally, the determination of the association relationship includes: determining based on the angular velocity and angular acceleration values of each data point in the band.
[0012] Optionally, the reconstruction includes:
[0013] Identify the number of points in the buffer band and the amplitude difference between the two points of the start / end segment;
[0014] Reconstruct the curve of the over-limit segment by applying the standard sine function according to the recognition result.
[0015] Optionally, judge the smoothness in the splicing band, including:
[0016] Check whether the first derivative and the second derivative of the splicing band are continuous.
[0017] This application also provides a device for correcting over-limit points of measured data, including:
[0018] A judgment module, used to judge over-limit points in the measured data and screen the measured data according to the over-limit points to obtain a preprocessing band containing the over-limit points;
[0019] A segmentation module, used to segment the preprocessing band into a reserved band, a buffer band and an over-limit band according to the association relationship with the over-limit points in the preprocessing band;
[0020] A correction module, used to correct the buffer band and reconstruct the over-limit band, and splice the reserved band with the corrected buffer band and the reconstructed over-limit band to obtain a splicing band;
[0021] A verification module, used to judge the smoothness and over-limit points in the splicing band, and repeat the steps from S1 to S3 until no over-limit points are found.
[0022] Optionally, the over-limit points include: swing amplitude data exceeding the reproducible swing amplitude of the turntable.
[0023] Optionally, the determination of the association relationship includes: determining according to the values of the angular velocity and angular acceleration of each data point in the band.
[0024] Optionally, the correction module further includes:
[0025] An identification unit, used to identify the number of points in the buffer band and the amplitude difference between the two points of the start / end segment;
[0026] A reconstruction unit, used to reconstruct the curve of the over-limit segment by applying the standard sine function according to the recognition result.
[0027] Optionally, judge the smoothness in the splicing band, including:
[0028] Check whether the first derivative and the second derivative of the splicing band are continuous.
[0029] The advantages of this application compared with the prior art are:
[0030] The present application provides a method for correcting overlimit points in the reproduction of an actual measurement data turntable, including: S1 determining overlimit points in the actual measurement data, and screening the actual measurement data according to the overlimit points to obtain a preprocessing band including the overlimit points; S2 in the preprocessing band, dividing the preprocessing band into a reserved band, a buffer zone band, and an overlimit zone band according to the association relationship with the overlimit points; S3 correcting the buffer zone band and reconstructing the overlimit zone band, and splicing the reserved band with the corrected buffer zone band and the reconstructed overlimit zone band to obtain a spliced band; S4 determining the smoothness and overlimit points in the spliced band, and repeating the steps of S1 to S3 until no overlimit points are found. By correcting the overlimit points in the actual measurement data, the present application can improve the reproducibility of the actual measurement data without affecting the waveform characteristics. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] Figure 1 is a flowchart of correcting overlimit points in the actual measurement data in the present application.
[0032] Figure 2 is a schematic diagram of the processing logic for correcting overlimit points in the actual measurement data in the present application.
[0033] Figure 3 is a schematic diagram of the waveform comparison before and after correcting overlimit points in the actual measurement data in the present application.
[0034] Figure 4 is a schematic diagram of the device for correcting overlimit points in the actual measurement data in the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0035] The following content is all examples of the specific implementation process provided to detail the technical solution to be protected by the present application. However, the present application can also be implemented in other ways different from the descriptions herein. Those skilled in the art can implement the present application by using different technical means under the guidance of the concept of the present application. Therefore, the present application is not limited by the following specific embodiments.
[0036] The present application provides a method for correcting over-limit points in the reproduction of measured data on a turntable, including: S1 determining over-limit points in the measured data, and screening the measured data according to the over-limit points to obtain a preprocessing band containing the over-limit points; S2 in the preprocessing band, dividing the preprocessing band into a reserved band, a buffer zone band, and an over-limit zone band according to the association relationship with the over-limit points; S3 correcting the buffer zone band and reconstructing the over-limit zone band, and splicing the reserved band with the corrected buffer zone band and the reconstructed over-limit zone band to obtain a spliced band; S4 determining the smoothness and over-limit points in the spliced band, and repeating the steps from S1 to S3 until no over-limit points are found. By correcting the over-limit points in the measured data, the present application can improve the reproducibility of the measured data without affecting the waveform characteristics.
[0037] Figure 1 is the flowchart for correcting over-limit points of measured data in the present application.
[0038] Please refer to Figure 1 As shown, S1 determines over-limit points in the measured data, and screens the measured data according to the over-limit points to obtain a preprocessing band containing the over-limit points.
[0039] In the present application, the measured data refers to the actual measurement data of inertial components. After the measured data is acquired, over-limit points in the measured data are first determined, and a preprocessing band is screened according to the over-limit points. The over-limit points are points that exceed the turntable's ability to reproduce the measured data, including data of the swing amplitude exceeding the turntable's reproducible range. The data of the swing amplitude that the turntable can reproduce can be a preset threshold. When the swing amplitude is greater than the threshold, it is determined as an over-limit point.
[0040] The measured data obtained by the data acquisition device is an array composed of discrete equally spaced points, and the array can be described by a curve. The interval is determined according to the sampling period in data sampling.
[0041] The measured data includes: the number of points, peak values, start point, end point, angular velocity, and angular acceleration. The number of points refers to the number of samples in a band; the peak values are the maximum and minimum values of the wave amplitude in a band; the start point and end point are the starting sampling point and the last sampling point of a band; the angular velocity and angular acceleration are the angular velocity and angular acceleration of the turntable, and the expressions of the angular velocity and angular acceleration are as follows:
[0042]
[0043]
[0044] where, ω i is the angular velocity, Ai+1 -A i represents the difference in angles between two adjacent sampling points, Δt is the sampling period, and i represents the sampling point sequence number. α i is the angular acceleration, ω i+1 -ω i represents the difference in amplitudes between adjacent sampling points.
[0045] According to the above measured data, during the actual operation of the inertial component, amplitude data during motion is collected, and at the same time, the angular velocity and angular acceleration of the inertial component are detected.
[0046] After determining and finding the overlimit points, intercept the waveband containing the overlimit points as the preprocessing waveband. The preprocessing waveband includes: a reserved waveband, a buffer waveform, and an overlimit area waveband. The reserved waveband is the waveband that does not need to be processed; the buffer waveband is the waveband that needs to be trimmed; the overlimit area waveband is the waveband that needs to be deleted and reconstructed.
[0047] Please refer to Figure 1 As shown, in the preprocessing waveband, according to the association relationship with the overlimit points, the preprocessing waveband is divided into a reserved waveband, a buffer waveband, and an overlimit area waveband.
[0048] The association relationship is determined according to the processing method of each data point in the preprocessing waveband. The processing methods include: in a preprocessing waveband, the overlimit area waveband is deleted and reconstructed, the buffer waveband is trimmed, and then the reserved waveband, the buffer waveband, and the overlimit area waveband are smooth curves.
[0049] Based on the association relationship, the preprocessing waveband is divided into a reserved waveband, a buffer waveband, and an overlimit area waveband, and then different processing is performed on different area wavebands respectively to achieve the purpose of correcting the waveband.
[0050] Please refer to Figure 1 As shown, S3 corrects the buffer waveband and reconstructs the overlimit area waveband, and splices the reserved waveband with the corrected buffer waveband and the reconstructed overlimit area waveband to obtain a spliced waveband.
[0051] The reserved waveband is not processed and is directly retained.
[0052] The buffer waveband needs to be corrected. Specifically, it includes: identifying the number of points in the buffer waveband and the amplitude difference between the start / end segment two points;
[0053] According to the recognition result, apply the standard sine function to reconstruct the waveband curve.
[0054] For example, a coordinate system is established with the starting point of the buffer zone as the center of the circle, and a sine function is obtained using the data points at the starting and ending points of the buffer zone as known values, serving as the waveform of the buffer zone band.
[0055] The band in the overrun area needs to be reconstructed. The steps include deleting the band in the overrun area, and then substituting the data of the connection points between the buffer zone band and the overrun area band, along with the angular velocity and acceleration, into the sine function to obtain the newly built overrun area band.
[0056] Finally, the reserved band, the corrected buffer zone band, and the reconstructed overrun area band are spliced together to obtain the spliced band.
[0057] Please refer to Figure 1 As shown, in S4, the smoothness and overrun points in the spliced band are judged, and the steps from S1 to S3 are repeated until no overrun points are found.
[0058] The smoothness is determined by the curvature. Preferably, the first derivative of the curve is continuous and the second derivative is used to obtain a constant.
[0059] Figure 2 It is a schematic diagram of the processing logic for correcting overrun points in the measured data in this application.
[0060] Please refer to Figure 2 As shown, the correction of overrun points in the measured data in this application can be executed through code, and the specific logical steps are as follows:
[0061] In the first step, the measured data is input, and it is judged whether there are overrun points in the measured data;
[0062] In the second step, if there are overrun points, continuous overrun points and their indexes are taken; if there are no overrun points, it is set as the reserved band.
[0063] Among them, the index is the above-mentioned association relationship, which is the relationship between the determined amplitude and the magnitudes of the angular velocity and angular acceleration.
[0064] In the third step, the buffer zone band and the reconstruction zone band are segmented according to the index.
[0065] In the fourth step, the band is corrected or reconstructed, including: obtaining the number of points and the interval of the buffer zone band, the number of points and the starting value of the overrun area band; waveform correction or waveform reconstruction to form the corrected buffer zone waveform or the reconstructed overrun area waveform;
[0066] In the fifth step, the bands are spliced;
[0067] Step 6: Smoothness detection, including first derivative continuity detection and second derivative continuity detection; overrun point judgment. If the first derivative continuity detection, second derivative continuity detection, and overrun point detection do not meet the requirements, the band will be returned to Step 4; if all meet the requirements, the execution process will be completed.
[0068] Finally, the newly generated waveform will limit the amplitude within a certain range so that the measured data can be reproduced on the turntable. Specifically, the front and back comparison diagram of the waveform is as Figure 3 shown.
[0069] This application also provides a device for correcting overrun points of measured data, including: a judgment module 401, a segmentation module 402, a correction module 403, and a verification module 404.
[0070] Figure 4 is a schematic diagram of the device for correcting overrun points of measured data in this application.
[0071] Please refer to Figure 4 shown. The judgment module 401 is used to judge overrun points in the measured data and screen the measured data according to the overrun points to obtain a preprocessed band containing the overrun points.
[0072] In this application, after the measured data is acquired, first judge the overrun points in the measured data, and screen the preprocessed band according to the overrun points. The overrun point is a point that exceeds the turntable's ability to reproduce the measured data, including the swing amplitude data that exceeds the swing amplitude that the turntable can reproduce. The swing amplitude data that the turntable can reproduce can be a preset threshold. When the swing amplitude is greater than the threshold, it is determined as an overrun point.
[0073] The measured data obtained by the data acquisition device is an array composed of discrete equally spaced points, and the array can be described by a curve. The interval is determined according to the sampling period in data sampling.
[0074] The measured data includes: the number of points, peak value, starting point, ending point, angular velocity, and angular acceleration. The number of points refers to the number of samples in a band; the peak value is the maximum and minimum values of the wave amplitude in a band; the starting point and ending point are the starting sampling point and the last sampling point of a band; the angular velocity and angular acceleration are the angular velocity and angular acceleration of the turntable. The expressions of the angular velocity and angular acceleration are as follows:
[0075]
[0076]
[0077] where ω i is the angular velocity, A i+1 -Ai represents the difference in angles between two adjacent sampling points, Δt is the sampling period, and i represents the sampling point sequence number. α i is the angular acceleration, ω i+1 -ω i represents the difference in amplitudes between adjacent sampling points.
[0078] According to the above measured data, during the actual operation of the inertial component, the data acquisition device will collect amplitude data during movement, and simultaneously detect the angular velocity and angular acceleration of the inertial component.
[0079] After determining and detecting the overlimit point, intercept the wave band containing the overlimit point as the preprocessing wave band. The preprocessing wave band includes: a reserved wave band, a buffer waveform, and an overlimit area wave band. The reserved wave band is the wave band that does not need to be processed; the buffer area wave band is the wave band that needs to be trimmed; the overlimit area wave band is the wave band that needs to be deleted and reconstructed.
[0080] Please refer to Figure 4 shown, the segmentation module 402 is used to segment the preprocessing wave band into a reserved wave band, a buffer area wave band, and an overlimit area wave band according to the association relationship with the overlimit point in the preprocessing wave band.
[0081] The association relationship is determined according to the processing method of each data point in the preprocessing wave band. The processing method includes: in a preprocessing wave band, the overlimit area wave band is deleted and reconstructed, the buffer area wave band is trimmed, and then the reserved wave band, the buffer area wave band, and the overlimit area wave band are smooth curves.
[0082] Based on the association relationship, the preprocessing wave band is segmented into a reserved wave band, a buffer area wave band, and an overlimit area wave band, and then different processing is performed on different area wave bands respectively to achieve the purpose of correcting the wave band.
[0083] Please refer to Figure 4 shown, the correction module 403 is used to correct the buffer area wave band and reconstruct the overlimit area wave band, and splice the reserved wave band with the corrected buffer area wave band and the reconstructed overlimit area wave band to obtain a spliced wave band.
[0084] The reserved wave band is not processed and is directly retained.
[0085] The buffer area wave band needs to be corrected. Specifically, it includes: identifying the number of points in the buffer area wave band and the amplitude difference between the two points at the start / end segment;
[0086] According to the recognition result, apply the standard sine function to reconstruct the wave band curve.
[0087] For example, a coordinate system is established with the starting point of the buffer zone as the center of the circle, and a sine function is obtained with the data points at the starting point and the ending point of the buffer zone as known numbers, serving as the waveform of the buffer zone band.
[0088] The overrun zone band needs to be reconstructed. The steps include deleting the overrun zone band, and then substituting the data of the connection points between the buffer zone band and the overrun zone band, as well as the angular velocity and acceleration, into the sine function to obtain the newly built overrun zone band.
[0089] Finally, the reserved band, the corrected buffer zone band, and the reconstructed overrun zone band are spliced together to obtain the spliced band.
[0090] Please refer to Figure 4 As shown, the verification module 404 is used to judge the smoothness and overrun points in the spliced band, and repeat the steps from S1 to S3 until no overrun points are found anymore.
[0091] The smoothness is determined by the curvature. Preferably, the first derivative of the curve is continuous and the second derivative is obtained as a constant.
Claims
1. A method for correcting over-limit points of measured data, characterized in that, it includes: S1. Determine the over-limit points in the measured data, and filter the measured data according to the over-limit points to obtain a preprocessing band containing the over-limit points, where the over-limit points are points that exceed the turntable's ability to reproduce the measured data; S2. In the preprocessing band, divide the preprocessing band into a reserved band, a buffer band, and an over-limit band according to the correlation relationship with the over-limit points, where the correlation relationship is the relationship between the amplitude and the magnitudes of the angular velocity and angular acceleration; S3. Correct the buffer band and reconstruct the over-limit band, and splice the reserved band with the corrected buffer band and the reconstructed over-limit band to obtain a spliced band; S4. Judge the smoothness and over-limit points in the spliced band, and repeat the steps of S1 to S3 until no over-limit points are found.
2. The method for correcting over-limit points of measured data according to claim 1, characterized in that, the over-limit points include: the swing amplitude data that exceeds the reproducible range of the turntable.
3. The method for correcting over-limit points of measured data according to claim 1, characterized in that, the determination of the correlation relationship includes: determining according to the values of the angular velocity and angular acceleration of each data point in the band.
4. The method for correcting over-limit points of measured data according to claim 1, characterized in that, the reconstruction includes: identifying the number of points in the buffer band and the amplitude difference between the starting / ending two points; reconstructing the over-limit section curve by applying the standard sine function according to the identification result.
5. The method for correcting over-limit points of measured data according to claim 1, characterized in that, judging the smoothness in the spliced band includes: checking whether the first derivative and the second derivative of the spliced band are continuous.
6. An apparatus for correcting over-limit points of measured data, characterized in that, it includes: A judgment module, used to judge the over-limit points in the measured data, and filter the measured data according to the over-limit points to obtain a preprocessing band containing the over-limit points, where the over-limit points are points that exceed the turntable's ability to reproduce the measured data; A segmentation module, used to divide the preprocessing band into a reserved band, a buffer band, and an over-limit band according to the correlation relationship with the over-limit points in the preprocessing band, where the correlation relationship is the relationship between the amplitude and the magnitudes of the angular velocity and angular acceleration; A correction module, used to correct the buffer band and reconstruct the over-limit band, and splice the reserved band with the corrected buffer band and the reconstructed over-limit band to obtain a spliced band; A verification module, used to judge the smoothness and over-limit points in the spliced band, and repeat the steps of S1 to S3 until no over-limit points are found.
7. The apparatus for correcting over-limit points of measured data according to claim 6, characterized in that, the over-limit points include: the swing amplitude data that exceeds the reproducible range of the turntable.
8. The apparatus for correcting over-limit points of measured data according to claim 6, characterized in that, the determination of the correlation relationship includes: determining according to the values of the angular velocity and angular acceleration of each data point in the band.
9. The device for correcting the over-limit points of measured data according to claim 6, wherein, the correction module further includes: an identification unit, configured to identify the number of points in the buffer band and the amplitude difference between the two points of the start / end segment; a reconstruction unit, configured to reconstruct the over-limit segment curve by applying a standard sine function according to the identification result.
10. The device for correcting the over-limit points of measured data according to claim 6, wherein, judging the smoothness in the splicing band includes: checking whether the first derivative and the second derivative of the splicing band are continuous.
Citation Information
Patent Citations
Recurrence diagnosis and self-repairing method for radar measurement metadata
CN110083899A