A resonance component positioning method and device, computer equipment and storage medium

Abstract

Embodiments of the present application disclose a resonance component positioning method and device, computer equipment and a storage medium. The input-output coherence is determined according to an excitation force applied to a to-be-tested component and a vibration output result corresponding to the excitation force. The frequency response quality information is determined according to the input-output coherence and a force attenuation degree of the excitation force. If the frequency response quality information meets a preset condition, the resonance frequency of the to-be-tested component is determined according to the vibration output result. If the resonance frequency of the to-be-tested component matches a vehicle abnormal sound frequency, the to-be-tested component is determined as a resonance component. In this way, the frequency response quality can be analyzed based on the excitation force and the vibration output result. The positioning of the resonance component is performed when the frequency quality meets the condition. The accuracy of the resonance component positioning is improved. The interference of invalid data on the resonance component positioning is reduced. The resonance positioning efficiency is improved.

Description

Technical Field

[0001] This invention relates to the automotive field, and in particular to a method and apparatus for locating resonant components, a computer device, and a storage medium. Background Technology

[0002] Resonance refers to the phenomenon where a single physical system vibrates with a larger amplitude at a specific frequency than at other frequencies. In the automotive industry, a vehicle may experience resonance in a component while in motion, resulting in abnormal noises and affecting the driving experience. By determining the resonant frequency of a vehicle component and comparing it with an abnormal frequency, the component causing the abnormal noise can be identified.

[0003] Currently, the resonant frequencies in noise, vibration, and harshness (NVH) problems are typically determined using modal testing via the impact method. In impact modal testing, a force hammer is applied artificially to excite the component under test, and the frequency response function (FRF) is obtained.

[0004] However, the quality of the manually applied hammer excitation is closely related to the professionalism and experience of the testers. Even experienced testers can hardly avoid producing low-quality results with poor coherence, requiring as many modal tests as possible to obtain a better frequency response function. This significantly reduces the efficiency of determining the resonance problem of the component. Moreover, even when the same person conducts several tests, the input excitation will vary, resulting in different attenuation rates of the excitation within the frequency band of interest, which also affects the accuracy of the resonance problem results. Summary of the Invention

[0005] To address the aforementioned technical problems, embodiments of this application provide a method and apparatus for locating resonant components, a computer device, and a storage medium, thereby improving the efficiency and accuracy of resonant positioning.

[0006] In a first aspect, embodiments of this application provide a method for locating a resonant component, the method comprising:

[0007] The input-output coherence is determined based on the excitation force applied to the component under test and the vibration output result corresponding to the excitation force.

[0008] The frequency response quality information is determined based on the input-output coherence and the force attenuation of the excitation force.

[0009] If the frequency response quality information meets the preset conditions, the resonant frequency of the component under test is determined based on the vibration output result;

[0010] If the resonant frequency of the component under test matches the abnormal noise frequency of the vehicle, then the component under test is determined to be a resonant component.

[0011] Optionally, determining the input-output coherence based on the excitation force applied to the component under test and the vibration output result corresponding to the excitation force includes:

[0012] Calculate the input-output coherence using the following formula:

[0013]

[0014] The R XF For input-output coherence, X i For the i-th value in the vibration output result, the F i Let i be the i-th value in the excitation force, where i is a positive integer. The average value of the vibration output results, the The average value of the excitation force.

[0015] Optionally, determining the frequency response quality information based on the input-output coherence and the force attenuation of the excitation force includes:

[0016] Calculate the frequency response quality information using the following formula:

[0017]

[0018] Wherein, the R XF The input-output coherence is given by ΔF, the force attenuation is given by δ, the frequency response quality information is given by c, and the force attenuation is expressed as follows:

[0019]

[0020] F0 and F1 are the upper and lower bounds of the frequency band of interest determined based on the frequency of the vehicle's abnormal noise.

[0021] Optionally, if the frequency response quality information meets preset conditions, determining the resonant frequency of the component under test based on the vibration output result includes:

[0022] If, when c is determined to be a first constant, the frequency response quality information is greater than a first threshold, then the resonant frequency of the component under test is determined based on the vibration output result; or,

[0023] If the frequency quality information is less than the first threshold when c is determined to be a first constant, and the frequency quality information is greater than the second threshold when c is determined to be a second constant, then the resonant frequency of the component under test is determined based on the vibration output result.

[0024] Optionally, if the frequency quality information is less than the first threshold when c is determined to be a first constant, and the frequency quality information is greater than the second threshold when c is determined to be a second constant, then determining the resonant frequency of the component under test based on the vibration output result includes:

[0025] If when c is determined to be a first constant, the frequency quality information is less than the first threshold, and when c is determined to be a second constant, the frequency quality information is greater than the second threshold, and other frequency response quality information corresponding to other vibration output results of the component under test satisfies the condition that when c is a first constant, the other frequency response quality information is greater than the first threshold, then the resonant frequency of the component under test is determined based on the vibration output results and the other vibration output results.

[0026] Optionally, the method further includes:

[0027] If, when c is determined to be a second constant, the frequency quality information is less than a second threshold, then a quality failure alert is generated; or,

[0028] If it is determined that when c is a first constant, the frequency quality information is less than the first threshold, and when it is determined that when c is a second constant, the frequency quality information is greater than the second threshold, then a quality dissatisfaction reminder is generated.

[0029] Secondly, embodiments of this application provide a resonant component positioning device, the device comprising:

[0030] The coherence determination unit is used to determine the input-output coherence based on the excitation force applied to the component under test and the vibration output result corresponding to the excitation force.

[0031] A quality determination unit is used to determine frequency response quality information based on the input-output coherence and the force attenuation of the excitation force.

[0032] The resonance frequency determination unit is used to determine the resonance frequency of the component under test based on the vibration output result if the frequency response quality information meets the preset conditions.

[0033] The resonant component determination unit is used to determine that the component under test is a resonant component if the resonant frequency of the component under test matches the abnormal noise frequency of the vehicle.

[0034] Optionally, the coherence determination unit is specifically used for:

[0035] Calculate the input-output coherence using the following formula:

[0036]

[0037] The R XFFor input-output coherence, X i For the i-th value in the vibration output result, the F i Let i be the i-th value in the excitation force, where i is a positive integer. The average value of the vibration output results, the The average value of the excitation force.

[0038] Optionally, the quality determination unit is specifically used for:

[0039] Calculate the frequency response quality information using the following formula:

[0040]

[0041] Wherein, the R XF The input-output coherence is given by ΔF, the force attenuation is given by δ, the frequency response quality information is given by c, and the force attenuation is expressed as follows:

[0042]

[0043] F0 and F1 are the upper and lower bounds of the frequency band of interest determined based on the frequency of the vehicle's abnormal noise.

[0044] Optionally, the resonant frequency determination unit is specifically used for:

[0045] If, when c is determined to be a first constant, the frequency response quality information is greater than a first threshold, then the resonant frequency of the component under test is determined based on the vibration output result; or,

[0046] If the frequency quality information is less than the first threshold when c is determined to be a first constant, and the frequency quality information is greater than the second threshold when c is determined to be a second constant, then the resonant frequency of the component under test is determined based on the vibration output result.

[0047] Optionally, the resonant frequency determination unit is specifically used for:

[0048] If when c is determined to be a first constant, the frequency quality information is less than the first threshold, and when c is determined to be a second constant, the frequency quality information is greater than the second threshold, and other frequency response quality information corresponding to other vibration output results of the component under test satisfies the condition that when c is a first constant, the other frequency response quality information is greater than the first threshold, then the resonant frequency of the component under test is determined based on the vibration output results and the other vibration output results.

[0049] Optionally, the device further includes:

[0050] The reminder unit is configured to generate a quality failure reminder if the frequency quality information is less than a second threshold when c is determined to be a second constant; or, to generate a quality dissatisfaction reminder if the frequency quality information is less than the first threshold when c is determined to be a first constant, and greater than the second threshold when c is determined to be a second constant.

[0051] Thirdly, embodiments of this application disclose a computer device, which includes a processor and a memory:

[0052] The memory is used to store program code and transmit the program code to the processor;

[0053] The processor is configured to execute the resonant component positioning method as described in the first aspect and any option thereof, according to the instructions in the program code.

[0054] Fourthly, embodiments of this application disclose a computer-readable storage medium for storing a computer program, which, when executed by a processor, performs the resonant component positioning method as described in the first aspect and any option thereof.

[0055] This application provides a method and apparatus for locating resonant components, a computer device, and a storage medium. Based on the excitation force applied to the component under test and the corresponding vibration output result, the input-output coherence is determined. Based on the input-output coherence and the force attenuation of the excitation force, frequency response quality information is determined. If the frequency response quality information meets preset conditions, the resonant frequency of the component under test is determined based on the vibration output result. If the resonant frequency of the component under test matches the abnormal noise frequency of the vehicle, the component under test is determined to be a resonant component. This allows for analysis of the frequency response quality based on the excitation force and vibration output result, and enables the location of the resonant component when the frequency quality meets the conditions. This improves the accuracy of resonant component location, reduces interference from invalid data, and enhances resonant location efficiency. Attached Figure Description

[0056] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0057] Figure 1 A flowchart illustrating a method for locating a resonant component, as provided in an embodiment of this application;

[0058] Figure 2 A schematic diagram of in-vehicle noise provided in an embodiment of this application;

[0059] Figure 3 A schematic diagram of a test result provided in an embodiment of this application;

[0060] Figure 4 A schematic diagram of an input / output model provided in an embodiment of this application;

[0061] Figure 5 A force spectrum diagram provided for an embodiment of this application;

[0062] Figure 6 This application provides a schematic diagram of a resonance problem locking interval.

[0063] Figure 7 A schematic diagram illustrating a result analysis strategy provided in an embodiment of this application;

[0064] Figure 8 A schematic diagram illustrating a frequency response result provided in an embodiment of this application;

[0065] Figure 9 This is a schematic diagram comparing noise resonance regions provided in an embodiment of this application;

[0066] Figure 10 A structural block diagram of a resonant component positioning device provided in an embodiment of this application;

[0067] Figure 11 This is a structural block diagram of a computer device provided in an embodiment of this application. Detailed Implementation

[0068] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0069] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0070] The following detailed description, in conjunction with the accompanying drawings, illustrates the specific implementation of a resonant component positioning method and apparatus, computer equipment, and storage medium provided in this application through embodiments.

[0071] refer to Figure 1 The diagram shown is a flowchart of a resonant component positioning method provided in an embodiment of this application. The method may include the following steps.

[0072] S101, determine the input-output coherence based on the excitation force applied to the component under test and the vibration output result corresponding to the excitation force.

[0073] In this embodiment, the vehicle may exhibit resonant noise. Generally, the frequency of the resonant noise (referred to as the vehicle noise frequency) matches the resonant frequency of the noisy component. Determining the resonant frequency of the component helps pinpoint the source of the resonant noise, thereby facilitating its elimination. For example, after the launch of a certain 2.0T SUV model, market complaints included a noticeable resonant humming sound audible in the passenger compartment at high speeds, causing strong customer complaints. (Reference) Figure 2 The diagram shown is a schematic of in-vehicle noise provided in an embodiment of this application. The resonance range of the noise (i.e., the frequency range of abnormal vehicle noise) is 300-500Hz, and the center frequency is 400Hz. The frequency band of interest can be determined based on the resonance range of the abnormal noise. If the resonance frequency of the component under test is within the frequency band of interest, the component under test can be considered as an abnormal noise component (also called a resonance component). The frequency band of interest can be located near the center frequency, for example, it can be 350-450Hz.

[0074] In this embodiment, modal testing of the component under test (SUT) can be performed using the impact test method to determine its resonant frequency. The SUT can be any component in a vehicle that experiences resonance. In the impact modal test, a hammer is applied manually to excite the component, and its frequency response function is obtained. However, even experienced testers can hardly avoid producing low-quality results with poor coherence. (Reference) Figure 3 The figure shows a schematic diagram of a test result provided in an embodiment of this application. The horizontal axis represents frequency (Hz) and the vertical axis represents intensity (dB). As can be seen from the figure, in the latter half of the test result, the input force has been significantly attenuated, and the coherence is also very poor, resulting in a very poor quality of the obtained frequency response (FRF) result.

[0075] In this embodiment, the input-output coherence can be determined based on the excitation force applied to the component and the corresponding vibration output. Input-output coherence represents the degree of correlation between the output and the input, and is also a measure of the reliability of the test results. The range of coherence is [0, 1]. The higher the coherence, the higher the confidence and accuracy of the results.

[0076] Specifically, the component under test (DUT) can be considered as a system. Determining the DUT's resonant frequency requires both input and output. This allows for the construction of a system input / output model, as shown in the reference. Figure 4 The diagram shown is a schematic of an input-output model provided in an embodiment of this application. When the system is the component under test and the resonant frequency of the test system is being measured, the input is the excitation force generated by the hammer, and the output is the acceleration response of the system, which is reflected in the vibration intensity at each frequency, and can also be called the vibration output result.

[0077] When the system (i.e., the component under test) is subjected to external excitation (excitation force), it will produce a vibration response, and its differential equation of motion is as follows:

[0078]

[0079] Where [M] is the system mass, [C] is the system damping, and [K] is the system stiffness.

[0080] Formula (1) is transformed by Fourier transform to obtain the following formula:

[0081] (-ω 2 [M]+jω[C]+[K]){X(ω)}={F(ω)} (2)

[0082] In the above formula, F(ω) is the input in the frequency domain and X(ω) is the output in the frequency domain.

[0083] The input-output coherence of the component under test can be expressed by the following coherence equation:

[0084]

[0085] In the above formula, R XF For input-output coherence, X i For the i-th value in the vibration output result, the F i Let i be the i-th value in the excitation force, where i is a positive integer. The average value of the vibration output results, the The average value of the excitation force.

[0086] S102 determines the frequency response quality information based on the input-output coherence and the force attenuation of the excitation force.

[0087] In this embodiment, the excitation force should be flat across the entire frequency range of interest, without significant attenuation within the target frequency band, to ensure high-quality test results. Therefore, the force spectrum needs to have sufficient and relatively uniformly distributed excitation energy across the entire frequency range of interest. If the force spectrum attenuates significantly, it will fail to excite the structure's response within those target frequency ranges, or even if it does, the quality of the frequency response (FRF) will be poor.

[0088] refer to Figure 5 The diagram shown is a force spectrum diagram provided in an embodiment of this application. The horizontal axis represents frequency, and the vertical axis represents intensity. The force attenuation ΔF within the frequency band of interest is calculated using the following formula:

[0089]

[0090] F0 and F1 are the upper and lower bounds of the frequency band of interest determined based on the frequency of the vehicle's abnormal noise.

[0091] After determining the force attenuation of the excitation force, the frequency response quality information can be determined based on the input-output coherence and the force attenuation. Specifically, the frequency response quality calculation formula can be used to calculate the relationship between the resonance problem locking interval and coherence and force attenuation for the frequency band of interest where the problem occurs, and to formulate the optimal control strategy to improve the efficiency and quality of problem locking.

[0092] The formula for calculating frequency response quality is as follows:

[0093]

[0094] Wherein, the R XF The input-output coherence is defined as follows: ΔF represents the force attenuation, δ represents the frequency response quality information, and c is a preset constant. In specific implementations, the preset constant can be either a first constant or a second constant. Coherence R XF The force attenuation ΔF can be calculated by acquiring the output (vibration response) and the input force signal.

[0095] S103, if the frequency response quality information meets the preset conditions, then determine the resonant frequency of the component under test based on the vibration output results.

[0096] After determining the frequency response quality information, it can be determined whether the frequency response quality information meets the preset conditions. If it does, it means that the output frequency response quality is high. At this time, the resonance frequency of the component under test can be determined based on the vibration output results. If the frequency response quality information does not meet the preset conditions, it means that the output frequency response quality is low. At this time, a reminder can be generated.

[0097] If multiple vibration output results exist, the frequency response quality information corresponding to the multiple vibration output results can be determined, so as to determine the quality of the multiple vibration output results based on the multiple frequency response quality information, and thus determine the resonant frequency of the component under test based on the multiple vibration output results.

[0098] Specifically, if the frequency response quality information is greater than the first threshold when c is a first constant, it indicates that the output frequency response quality is high, and the result is satisfactory. The resonant frequency of the component under test can then be determined based on the vibration output results. For example, refer to... Figure 6 The diagram shown is a schematic of a resonance problem locking interval provided in an embodiment of this application, where the horizontal axis represents force attenuation and the vertical axis represents coherence (coherence degree value). The first constant can be 0.7, the first threshold can be 0.3, and δ = (R XF -0.7) / ΔF>0.3, that is, R XFWhen the result is greater than 0.3ΔF + 0.7, it falls into the region in the upper left corner (denoted as the satisfactory interval), and the result can be considered satisfactory.

[0099] Furthermore, if the frequency quality information is less than the second threshold when c is a second constant, it indicates that the output frequency response quality is low. In this case, the result is unsatisfactory, and the output result is rejected, generating a quality failure warning to prevent the result from adversely affecting the determination of the resonant component. For example, refer to... Figure 6 As shown, the second constant can be 0.5, the second threshold can be 0.5, and in δ=(R XF -0.5) / ΔF<0.5, that is, R XF When the result is less than 0.5ΔF+0.5, it falls into the region in the lower right corner (denoted as the rejection interval), and the result can be considered unsatisfactory.

[0100] If the frequency quality information is less than the first threshold when c is a first constant, and greater than the second threshold when c is a second constant, then the result is generally acceptable, but the reliability is not high. The functional frequency of the component under test can be determined based on the vibration output result, or the output result can be rejected, generating a quality dissatisfaction warning. For example, refer to... Figure 6 As shown, the first constant can be 0.7, the first threshold can be 0.3, the second constant can be 0.5, and the second threshold can be 0.5, in δ=(R XF -0.5) / ΔF>0.5, that is, R XF >0.5ΔF+0.5, and δ=(R XF -0.7) / ΔF<0.3, that is, R XF When the result is less than 0.3ΔF+0.7, it falls into the middle region (denoted as the acceptable interval), and the result can be considered unsatisfactory.

[0101] In summary, for reference Figure 7 The diagram illustrates a result analysis strategy provided in an embodiment of this application. If the frequency response quality information falls within the satisfactory range, the test result is satisfactory, and no adjustment to the test strategy is required; the status quo can be maintained. The frequency response quality information can be used to lock the resonant components. If the frequency response quality information falls within the acceptable range, the test result is generally acceptable. It can be determined whether to adjust the test strategy based on the actual situation. If adjustment is required, it should be made to ensure that the frequency response quality information falls within the satisfactory range. If no adjustment is required, the status quo can be maintained, and the frequency response quality information can be used to lock the resonant components. If the frequency response quality information falls within the rejection range, the test strategy needs to be adjusted to ensure that the frequency response quality information falls within the satisfactory or acceptable range.

[0102] Regarding frequency response quality information within the acceptable range, the decision to adjust the testing strategy can be based on at least one of two factors: whether vibration output results within a satisfactory range exist simultaneously, and whether they match the frequency of abnormal vehicle noises. For example, if the component under test (DUT) exhibits vibration output results within a satisfactory range, the resonant frequency of the DUT can be determined by combining the vibration output results within the satisfactory and acceptable ranges without adjusting the testing strategy. Specifically, if it is determined that when c is a first constant, the frequency quality information is less than a first threshold, and when c is a second constant, the frequency quality information is greater than the second threshold, and other frequency response quality information corresponding to other vibration output results of the DUT satisfies the condition that when c is a first constant, the other frequency response quality information is greater than the first threshold, then the resonant frequency of the DUT is determined based on the vibration output results and the other vibration output results. If the DUT does not exhibit vibration output results within a satisfactory range, then if the vibration output results within the acceptable range match the frequency of abnormal vehicle noises, no adjustment to the testing strategy is required; if they do not match, the testing strategy can be adjusted to obtain new vibration output results; if they match, the testing strategy can be adjusted, or no adjustment may be made.

[0103] S104. If the resonant frequency of the component under test matches the abnormal noise frequency of the vehicle, then the component under test is determined to be a resonant component.

[0104] In this embodiment, the frequency band of interest can be determined based on the abnormal noise frequency of the vehicle. Based on the relationship between the resonant frequency of the component under test (DUT) and the frequency band of interest, it can be determined whether the resonant frequency of the DUT matches the abnormal noise frequency of the vehicle. Specifically, if the resonant frequency is located within the frequency band of interest, the resonant frequency of the DUT can be considered to match the abnormal noise frequency of the vehicle. When it is determined that the resonant frequency of the DUT matches the abnormal noise frequency of the vehicle, the DUT can be identified as a resonant component, achieving rapid and accurate identification of the relevant components causing resonance. Thus, by analyzing the frequency response quality based on the excitation force and vibration output results, and locating the resonant component when the frequency quality meets the conditions, the accuracy of resonant component location is improved, interference from invalid data is reduced, and resonance location efficiency is enhanced. This assists testers in obtaining high-quality test results quickly and accurately, effectively improving the efficiency of problem analysis and addressing complaints about NVH issues such as automotive noise and vibration.

[0105] refer to Figure 8 The diagram shown is a schematic representation of a frequency response result provided in an embodiment of this application. This result was obtained through on-site investigation by experts and is used to quickly and accurately locate the component with the problematic resonant frequency. Figure 2 The resonant center of 400Hz shown indicates that the frequency band of interest is around 400Hz (e.g., 350-450Hz). Figure 8As can be seen, within the satisfactory range of 0-1000Hz, there is only one resonant frequency around 400Hz, making the result easily identifiable and highly reliable, accurately pinpointing the problem. In the acceptable range, besides the large peak, there is a small peak interference result around 200Hz, but the large peak corresponds to the frequency of the problem, allowing for a rough identification of the problem. In the rejection range, neither of the two large peaks is within the resonant range, making it impossible to pinpoint the problem. Thus, this identification strategy points the way to approaching the problem; by optimizing the components corresponding to the problem range, the noise problem can be approximated.

[0106] refer to Figure 9 The diagram shown is a comparison of noise resonance intervals provided in an embodiment of this application. As can be seen from the diagram, the energy of the optimized noise resonance interval is significantly reduced, and the subjective assessment is acceptable, effectively solving the problem. After implementation of this invention, resonance problems can be quickly and efficiently identified by optimizing relevant parameters. This greatly saves the manpower and time costs associated with repeated testing and identification by engineers, and also increases the reliability and accuracy of resonance problem identification, providing a clear direction for problem identification, resolution, and optimization, effectively improving work efficiency.

[0107] This application provides a method for locating resonant components. Based on the excitation force applied to the component under test and the corresponding vibration output, the input-output coherence is determined. Based on the input-output coherence and the force attenuation of the excitation force, frequency response quality information is determined. If the frequency response quality information meets preset conditions, the resonant frequency of the component under test is determined based on the vibration output. If the resonant frequency of the component under test matches the abnormal noise frequency of the vehicle, the component under test is determined to be a resonant component. This method allows for analysis of the frequency response quality based on the excitation force and vibration output, enabling the location of resonant components when the frequency quality meets the conditions. This improves the accuracy of resonant component location, reduces interference from invalid data, and enhances resonant location efficiency.

[0108] Based on the above method for locating resonant components, this application also provides a device for locating resonant components, as described above. Figure 10 The diagram shown is a structural block diagram of a resonant component positioning device provided in an embodiment of this application. The device may include:

[0109] The coherence determination unit 110 is used to determine the input-output coherence based on the excitation force applied to the component under test and the vibration output result corresponding to the excitation force;

[0110] The quality determination unit 120 is used to determine frequency response quality information based on the input-output coherence and the force attenuation of the excitation force.

[0111] The resonance frequency determination unit 130 is used to determine the resonance frequency of the component under test based on the vibration output result if the frequency response quality information meets the preset conditions.

[0112] The resonance component determination unit 140 is used to determine the component under test as a resonance component if the resonance frequency of the component under test matches the abnormal noise frequency of the vehicle.

[0113] Optionally, the coherence determination unit is specifically used for:

[0114] Calculate the input-output coherence using the following formula:

[0115]

[0116] The R XF For input-output coherence, X i For the i-th value in the vibration output result, the F i Let i be the i-th value in the excitation force, where i is a positive integer. The average value of the vibration output results, the The average value of the excitation force.

[0117] Optionally, the quality determination unit is specifically used for:

[0118] Calculate the frequency response quality information using the following formula:

[0119]

[0120] Wherein, the R XF The input-output coherence is given by ΔF, the force attenuation is given by δ, the frequency response quality information is given by c, and the force attenuation is expressed as follows:

[0121]

[0122] F0 and F1 are the upper and lower bounds of the frequency band of interest determined based on the frequency of the vehicle's abnormal noise.

[0123] Optionally, the resonant frequency determination unit is specifically used for:

[0124] If, when c is determined to be a first constant, the frequency response quality information is greater than a first threshold, then the resonant frequency of the component under test is determined based on the vibration output result; or,

[0125] If the frequency quality information is less than the first threshold when c is determined to be a first constant, and the frequency quality information is greater than the second threshold when c is determined to be a second constant, then the resonant frequency of the component under test is determined based on the vibration output result.

[0126] Optionally, the resonant frequency determination unit is specifically used for:

[0127] If when c is determined to be a first constant, the frequency quality information is less than the first threshold, and when c is determined to be a second constant, the frequency quality information is greater than the second threshold, and other frequency response quality information corresponding to other vibration output results of the component under test satisfies the condition that when c is a first constant, the other frequency response quality information is greater than the first threshold, then the resonant frequency of the component under test is determined based on the vibration output results and the other vibration output results.

[0128] Optionally, the device further includes:

[0129] The reminder unit is configured to generate a quality failure reminder if the frequency quality information is less than a second threshold when c is determined to be a second constant; or, to generate a quality dissatisfaction reminder if the frequency quality information is less than the first threshold when c is determined to be a first constant, and greater than the second threshold when c is determined to be a second constant.

[0130] This application provides a resonant component positioning device. Based on the excitation force applied to the component under test and the corresponding vibration output result, the input-output coherence is determined. Based on the input-output coherence and the force attenuation of the excitation force, frequency response quality information is determined. If the frequency response quality information meets preset conditions, the resonant frequency of the component under test is determined based on the vibration output result. If the resonant frequency of the component under test matches the abnormal noise frequency of the vehicle, the component under test is determined to be a resonant component. This allows for analysis of the frequency response quality based on the excitation force and vibration output result, enabling the positioning of the resonant component when the frequency quality meets the conditions. This improves the accuracy of resonant component positioning, reduces interference from invalid data, and enhances resonant positioning efficiency.

[0131] Please see Figure 7 , Figure 7 This application provides a structural block diagram of a computer device for clutch engagement control. The computer device includes a processor 710 and a memory 720.

[0132] The memory 720 is used to store program code and transmit the program code to the processor 710;

[0133] The processor 710 is used to execute the resonant component positioning method according to the instructions in the program code in any of the above embodiments.

[0134] This application also discloses a computer-readable storage medium for storing a computer program, which, when executed by a processor, performs the resonant component positioning method described in any of the above embodiments.

[0135] Understandably, this method can be applied to processing devices capable of locating resonant components, such as terminal devices or servers with resonant component positioning capabilities. This method can be executed independently by the terminal device or server, or it can be applied in network scenarios where the terminal device and server communicate, executing in cooperation. The terminal device can be a computer, mobile phone, or similar device. The server can be an application server or a web server; in actual deployment, this server can be a standalone server or a cluster server.

[0136] As can be seen from the above description of the embodiments, those skilled in the art can clearly understand that all or part of the steps in the methods of the above embodiments can be implemented by means of software plus a general-purpose hardware platform. Based on this understanding, the technical solution of this application can be embodied in the form of a software product. This computer software product can be stored in a storage medium, such as a read-only memory (ROM) / RAM, magnetic disk, optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, a server, or a network communication device such as a router) to execute the methods described in various embodiments or some parts of the embodiments of this application.

[0137] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section.

[0138] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0139] The above description is merely a preferred embodiment of this application. Although this application has disclosed preferred embodiments above, it is not intended to limit this application. Any person skilled in the art can make many possible variations and modifications to the technical solutions of this application using the methods and techniques disclosed above, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the technical solutions of this application. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this application without departing from the content of the technical solutions of this application shall still fall within the protection scope of the technical solutions of this application.

Claims

1. A method for locating a resonant component, characterized in that, The method includes: The input-output coherence is determined based on the excitation force applied to the component under test and the vibration output result corresponding to the excitation force. The frequency response quality information is determined based on the input-output coherence and the force attenuation of the excitation force. If the frequency response quality information meets the preset conditions, the resonant frequency of the component under test is determined based on the vibration output result; If the resonant frequency of the component under test matches the abnormal noise frequency of the vehicle, then the component under test is determined to be a resonant component. The step of determining the frequency response quality information based on the input-output coherence and the force attenuation of the excitation force includes: Calculate the frequency response quality information using the following formula: ； Among them, the For input-output coherence, the For force attenuation, the For frequency response quality information, c is a preset constant; If the frequency response quality information meets preset conditions, then the resonant frequency of the component under test is determined based on the vibration output result, including: If, when c is determined to be a first constant, the frequency response quality information is greater than a first threshold, then the resonant frequency of the component under test is determined based on the vibration output result; or, If the frequency response quality information is less than the first threshold when c is determined to be a first constant, and the frequency response quality information is greater than the second threshold when c is determined to be a second constant, then the resonant frequency of the component under test is determined based on the vibration output result. The step of determining the resonant frequency of the component under test based on the vibration output result if the frequency response quality information is less than the first threshold when c is determined to be a first constant, and greater than the second threshold when c is determined to be a second constant, includes: if the frequency response quality information is less than the first threshold when c is determined to be a first constant, and greater than the second threshold when c is determined to be a second constant, and other frequency response quality information corresponding to other vibration output results of the component under test satisfies the condition that other frequency response quality information is greater than the first threshold when c is a first constant, then the resonant frequency of the component under test is determined based on the vibration output result and the other vibration output results; if the frequency response quality information is less than the second threshold when c is determined to be a second constant, then the vibration output result is rejected.

2. The method according to claim 1, characterized in that, The step of determining the input-output coherence based on the excitation force applied to the component under test and the corresponding vibration output result includes: Calculate the input-output coherence using the following formula: ； The For input-output coherence, the For the i-th value in the vibration output result, the Let i be the i-th value in the excitation force, where i is a positive integer. The average value of the vibration output results, the The average value of the excitation force.

3. The method according to claim 1 or 2, characterized in that, The force attenuation degree is expressed as: ； The and stated The excitation force corresponding to the upper and lower bounds of the frequency band of interest determined based on the abnormal noise frequency of the vehicle.

4. The method according to claim 1, characterized in that, The method further includes: If, when c is determined to be a second constant, the frequency response quality information is less than a second threshold, then a quality failure alert is generated; or, If it is determined that when c is a first constant, the frequency response quality information is less than the first threshold, and when it is determined that when c is a second constant, the frequency response quality information is greater than the second threshold, then a quality dissatisfaction reminder is generated.

5. A resonant component positioning device, characterized in that, The device includes: The coherence determination unit is used to determine the input-output coherence based on the excitation force applied to the component under test and the vibration output result corresponding to the excitation force. A quality determination unit is used to determine frequency response quality information based on the input-output coherence and the force attenuation of the excitation force. The resonance frequency determination unit is used to determine the resonance frequency of the component under test based on the vibration output result if the frequency response quality information meets the preset conditions. A resonant component determination unit is used to determine that the component under test is a resonant component if the resonant frequency of the component under test matches the abnormal noise frequency of the vehicle. The quality determination unit is specifically used for: Calculate the frequency response quality information using the following formula: ； Among them, the For input-output coherence, the For force attenuation, the For frequency response quality information, c is a preset constant; The resonance frequency determination unit is specifically used for: If, when c is determined to be a first constant, the frequency response quality information is greater than a first threshold, then the resonant frequency of the component under test is determined based on the vibration output result; or, If, when c is determined to be a first constant, the frequency response quality information is less than the first threshold, and when c is determined to be a second constant, the frequency response quality information is greater than the second threshold, then the resonant frequency of the component under test is determined based on the vibration output result; if, when c is determined to be a first constant, the frequency response quality information is less than the first threshold, and when c is determined to be a second constant, the frequency response quality information is greater than the second threshold, and the component under test has other frequency response quality information corresponding to other vibration output results that satisfy the condition that when c is a first constant, the other frequency response quality information is greater than the first threshold, then the resonant frequency of the component under test is determined based on the vibration output result and the other vibration output results; if, when c is determined to be a second constant, the frequency response quality information is less than the second threshold, then the vibration output result is rejected.

6. The apparatus according to claim 5, characterized in that, The force attenuation degree is expressed as: ； The and stated The excitation force corresponding to the upper and lower bounds of the frequency band of interest determined based on the abnormal noise frequency of the vehicle.

7. The apparatus according to claim 5, characterized in that, The device further includes: The reminder unit is configured to generate a quality failure reminder if the frequency response quality information is less than a second threshold when c is determined to be a second constant; or, to generate a quality dissatisfaction reminder if the frequency response quality information is less than the first threshold when c is determined to be a first constant, and greater than the second threshold when c is determined to be a second constant.

8. A computer device, characterized in that, The computer device includes a processor and memory: The memory is used to store program code and transmit the program code to the processor; The processor is used to execute the resonant component positioning method according to any one of claims 1-4 according to the instructions in the program code.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium is used to store a computer program, which, when executed by a processor, is used to perform the resonant component positioning method according to any one of claims 1-4.

Images