A method, device and storage medium for predicting the noise of a hydraulic mount

Abstract

The present invention discloses a method, device and storage medium for predicting the noise of a hydraulic mount. The method includes setting the hydraulic mount on a test bench, obtaining the test load of the hydraulic mount through a vehicle simulation model, then applying the test load, test amplitude and excitations at different frequencies within a preset frequency range to the hydraulic device on the test bench to perform excitation tests on the hydraulic mount, and obtaining the test data of the hydraulic mount under excitations at different frequencies. Furthermore, the noise prediction result of the hydraulic mount is determined based on the test data of the hydraulic mount under excitations at different frequencies. In the present invention, the noise test of the hydraulic mount can be carried out without a complete vehicle, so that developers can improve the hydraulic mount in advance according to the noise prediction result. After the production of the first batch of hydraulic mount samples, bench tests can be carried out without waiting for the completion of the production of the prototype vehicle for the whole vehicle test during the certification and production preparation stage, saving time and accelerating the progress of the whole vehicle development.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle suspension systems, and particularly to a method, device, and storage medium for predicting the noise of a hydraulic mount. Background Art

[0002] When a vehicle is running, due to different frequencies of road excitation sources, the powertrain will generate large vibrations. In order to effectively improve the vibration isolation performance of the powertrain under high-frequency vibrations, the hydraulic mount, as the suspension isolator with the best performance, has become the first choice for the development of the powertrain suspension.

[0003] However, there are also certain problems with the use of hydraulic mounts. When the vehicle passes over a speed bump or other bumpy roads, the displacement of the powertrain is relatively large. Under large-amplitude excitation, the hydraulic mount on the vehicle is prone to generate abnormal noises when it is displaced. Such abnormal noises are usually generated by the decoupling diaphragm of the hydraulic mount slapping against the upper and lower covers, and the abnormal noise is relatively loud and easily forms bad noises. Therefore, in order to improve the NVH (Noise, Vibration, and Harshness) performance of the whole vehicle, during the process of vehicle R & D and design, it is necessary to test and identify the noise generated by the hydraulic mount so as to improve the hydraulic mount according to the test results.

[0004] However, in the prior art, to identify the noise of the hydraulic mount, the hydraulic mount needs to be installed on the R & D vehicle for a whole-vehicle test. Generally, the noise of the hydraulic mount is identified before the engineering verification stage or before the standard operating procedure (SOP). In the engineering verification stage, the state of the test vehicle is usually not good, and there are many abnormal noises during the whole-vehicle test, so it is impossible to effectively identify the noise of the hydraulic mount. In order to improve the accuracy of the test results and avoid the difficulty in identifying the abnormal noise of the hydraulic mount on the whole vehicle caused by the poor state of the test vehicle, it is necessary to conduct a whole-vehicle test on a test vehicle with a good state after the acoustic package is fully developed, that is, a whole-vehicle test needs to be conducted in the production preparation stage (PT). However, if the hydraulic mount is adjusted and changed during the whole-vehicle test in the PT stage, it may cause the improved version of the hydraulic mount to not keep up with the whole-vehicle SOP node, thus possibly delaying the progress of the whole-vehicle R & D. Summary of the Invention

[0005] The present invention provides a method, device, and storage medium for predicting the noise of a hydraulic mount to solve the problem in the prior art that the whole-vehicle test of the hydraulic mount needs to be carried out, resulting in the inability to conduct the noise test of the hydraulic mount in advance, thus delaying the progress of the whole-vehicle R & D.

[0006] A method for predicting the noise of a hydraulic mount, the hydraulic mount being arranged on a test bench, the method comprising:

[0007] Obtaining the test load of the hydraulic mount through a preset simulation model, the preset simulation model including the model corresponding to the hydraulic mount;

[0008] Excite the hydraulic mount according to the test load, test amplitude, and different frequencies within a preset frequency range, and obtain the test data of the hydraulic mount under different frequency excitations;

[0009] Determine the noise prediction result of the hydraulic mount according to the test data of the hydraulic mount under different frequency excitations.

[0010] Further, the exciting the hydraulic mount according to the test load, test amplitude, and different frequencies within a preset frequency range, and obtaining the test data of the hydraulic mount under different frequency excitations includes:

[0011] Preheat the hydraulic mount according to the test load, the test amplitude, and a preheating frequency, and preheat it to a first preset duration;

[0012] Keep the test load and the test amplitude unchanged, and sequentially perform excitation tests on the hydraulic mount at different frequencies according to the preset frequency range to obtain the test data of the hydraulic mount under different frequency excitations.

[0013] Further, the keeping the test load and the test amplitude unchanged, and sequentially performing excitation tests on the hydraulic mount at different frequencies according to the preset frequency range to obtain the test data of the hydraulic mount under different frequency excitations includes:

[0014] a. Fix the frequency of the hydraulic mount, and the frequency of the hydraulic mount is within the preset frequency range;

[0015] b. Keep the test load and the test amplitude unchanged, perform an excitation test and start timing;

[0016] c. Collect the force load signal of the passive end of the hydraulic mount during the excitation test at a preset sampling rate;

[0017] d. Take the force load signal collected within a second preset duration as the test data under the current frequency excitation;

[0018] e. Change the frequency of the hydraulic mount, and loop through steps b - d to obtain the test data of the hydraulic mount under different frequency excitations.

[0019] Further, the determining the noise prediction result of the hydraulic mount according to the test data of the hydraulic mount under different frequency excitations includes:

[0020] Filter the test data of the hydraulic mount under different frequency excitations to obtain the filtered data of the hydraulic mount under different frequency excitations;

[0021] Determine the noise prediction result of the hydraulic mount according to the filtering data of the hydraulic mount under different frequency excitations.

[0022] Further, filter the test data of the hydraulic mount under different frequency excitations to obtain the filtering data of the hydraulic mount under different frequency excitations:

[0023] Extract the test data under each frequency excitation to obtain the effective noise data under each frequency excitation, where the effective noise data is the test data at preset moments within the second preset duration;

[0024] Filter the effective noise data under each frequency excitation according to the preset filtering frequency to obtain the filtering data of the hydraulic mount under different frequency excitations.

[0025] Further, the determining the noise prediction result of the hydraulic mount according to the filtering data of the hydraulic mount under different frequency excitations includes:

[0026] Eliminate the data within the third preset duration in the filtering data under each frequency excitation to obtain the target data under each frequency excitation;

[0027] Determine the maximum value and the minimum value of the target data under each frequency excitation, and determine the amplitude of the target data under each frequency excitation according to the maximum value and the minimum value;

[0028] Calculate the average value of all the target data amplitudes according to the target data amplitudes under each frequency excitation, and use it as the noise prediction result of the hydraulic mount.

[0029] Further, after determining the noise prediction result of the hydraulic mount according to the test data of the hydraulic mount under different frequency excitations, the method further includes:

[0030] If the noise prediction result of the hydraulic mount is less than or equal to the first preset value, the noise risk level of the hydraulic mount is risk-free;

[0031] If the noise prediction result of the hydraulic mount is greater than the first preset value and less than or equal to the second preset value, the noise risk level of the hydraulic mount is low risk;

[0032] If the noise prediction result of the hydraulic mount is greater than the second preset value and less than or equal to the third preset value, the noise risk level of the hydraulic mount is high risk;

[0033] If the noise prediction result of the hydraulic mount is greater than the third preset value, the noise risk level of the hydraulic mount is unacceptable.

[0034] A noise prediction device for a hydraulic mount, the hydraulic mount being arranged on a test bench, the device comprising:

[0035] An acquisition module for obtaining the test load of the hydraulic mount through a preset simulation model, the preset simulation model including the model corresponding to the hydraulic mount;

[0036] A test module for exciting and testing the hydraulic mount according to the test load, test amplitude and different frequencies within a preset frequency range, and obtaining the test data of the hydraulic mount under different frequency excitations;

[0037] A determination module for determining the noise prediction result of the hydraulic mount according to the test data of the hydraulic mount under different frequency excitations.

[0038] A hydraulic mount noise prediction device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of the above-mentioned hydraulic mount noise prediction method are implemented.

[0039] A readable storage medium storing a computer program, characterized in that when the computer program is executed by a processor, the steps of the above-mentioned hydraulic mount noise prediction method are implemented.

[0040] A hydraulic mount noise prediction system, comprising a test bench, a hydraulic mount, and the above-mentioned noise prediction device for the hydraulic mount.

[0041] In one solution provided by the above-mentioned hydraulic mount noise prediction method, device and storage medium, the hydraulic mount is arranged on a test bench, and the test load of the hydraulic mount is obtained through a preset simulation model, the preset simulation model including the model corresponding to the hydraulic mount. Then, through the test bench, the hydraulic device located on the test bench is subjected to excitation tests with a test load, test amplitude and different frequencies within a preset frequency range, and the test data of the hydraulic mount under different frequency excitations are obtained. Furthermore, the noise prediction result of the hydraulic mount is determined according to the test data of the hydraulic mount under different frequency excitations. In the present invention, through the bench test of the hydraulic mount, the simulated load is used as the test load, and the hydraulic mount is excited and tested in advance at different frequencies to obtain the noise prediction result of the hydraulic mount, solving the problem that the hydraulic mount needs to be tested on a whole vehicle, resulting in the inability to perform the hydraulic mount noise test in advance. The hydraulic mount can be subjected to noise test without a whole vehicle, so that subsequent developers can improve the hydraulic mount in advance according to the noise prediction result. After the first batch of hydraulic mount samples are produced, the noise of the hydraulic mount can be tested on the bench, without waiting for the completion of the production of the prototype vehicle in the certification and production preparation stage for whole vehicle testing, saving time and accelerating the progress of the whole vehicle development. Brief Description of the Drawings

[0042] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0043] Figure 1 is a schematic flowchart of a method for predicting the noise of a hydraulic mount in an embodiment of the present invention;

[0044] Figure 2 is Figure 1 a schematic flowchart of the implementation of step S20 in

[0045] Figure 3 is Figure 2 a schematic flowchart of the implementation of step S22 in

[0046] Figure 4 is a schematic structural diagram of a device for predicting the noise of a hydraulic mount in an embodiment of the present invention;

[0047] Figure 5 is another schematic structural diagram of a device for predicting the noise of a hydraulic mount in an embodiment of the present invention. Detailed Description of the Embodiments

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0049] The method for predicting the noise of a hydraulic mount provided by the embodiments of the present invention can be applied to a noise prediction system of a hydraulic mount as shown in Figure 1 The noise prediction system of the hydraulic mount includes a test bench, a hydraulic mount, and a noise prediction device for the hydraulic mount. Among them, the hydraulic mount is arranged on the test bench, and the noise prediction device for the hydraulic mount obtains the test load of the hydraulic mount through a preset simulation model. The preset simulation model includes a model corresponding to the hydraulic mount. Then, according to the test load, test amplitude, and different frequencies within a preset frequency range, the hydraulic mount arranged on the test bench is subjected to an excitation test, and the test data of the hydraulic mount under different frequency excitations is obtained. Finally, the noise prediction result of the hydraulic mount is determined according to the test data of the hydraulic mount under different frequency excitations.

[0050] In one embodiment, as shown inFigure 1 As shown, a method for predicting the noise of a hydraulic mount is provided. Taking the application of this method in a noise prediction device for a hydraulic mount as an example, the hydraulic mount is arranged on a test bench, and the method includes the following steps:

[0051] S10: Obtain the test load of the hydraulic mount through a preset simulation model, and the preset simulation model includes the model corresponding to the hydraulic mount.

[0052] After the first batch of samples of the hydraulic mount are produced, the hydraulic mount is arranged on the test bench to conduct a bench test on the noise of the hydraulic mount, so as to obtain the noise prediction result of the hydraulic mount in advance, so that developers can improve the hydraulic mount according to the noise prediction result of the hydraulic mount, and reduce the problems of difficult modification or insufficient R & D cycle caused by improving the hydraulic mount after the vehicle design is finalized in the later stage.

[0053] Before conducting a bench test on the hydraulic mount, in order to improve the accuracy of the bench test, it is necessary to simulate the load of the hydraulic mount in the vehicle installation state. Among them, the method for obtaining the test load of the hydraulic mount is: establish a preset simulation model including the model corresponding to the hydraulic mount in the finite element analysis software, and simulate the load of the hydraulic mount in the vehicle installation state in the preset simulation model to obtain the test load of the hydraulic mount. Among them, the preset simulation model is a load calculation model for the mount system, including the inertia parameters of the power train, the mount position, the stiffness in each direction of the mount, etc.

[0054] S20: Excite the hydraulic mount according to the test load, test amplitude and different frequencies within the preset frequency range, and obtain the test data of the hydraulic mount under different frequency excitations.

[0055] Before conducting a bench test on the hydraulic mount, determine the test amplitude and preset frequency range according to the performance of the hydraulic mount. Among them, in order to avoid the arm of the hydraulic mount hitting the upper limit more and generating interference signals, the test amplitude is the amplitude range where the arm of the hydraulic mount hits the upper limit less or not at all. For example, the test amplitude is ±4 mm. Among them, the preset frequency range is the common frequency interval where the hydraulic mount generates noise.

[0056] For example, the preset frequency range includes the bounce frequency interval of the vehicle power train, the peak lag angle distribution interval, the excitation frequency interval of common uneven road surfaces, the unsprung frequency interval, etc.

[0057] In this embodiment, the preset frequency range including the bounce frequency interval of the vehicle power train, the peak lag angle distribution interval, the excitation frequency interval of common uneven road surfaces, and the unsprung frequency interval is only for illustrative purposes. In other embodiments, the preset frequency range may also include other frequency intervals, which will not be elaborated here.

[0058] After determining the test load, test amplitude, and preset frequency range of the hydraulic mount, the hydraulic mount set on the test bench is excited and tested according to different frequencies within the test load, test amplitude, and preset frequency range, and the test data of the hydraulic mount under different frequency excitations is obtained.

[0059] For example, the test load is F 1 , the test amplitude is ±4 mm, and the preset frequency range is 8 Hz to 15 Hz. Apply the test load F 1 to the hydraulic mount on the test bench, and perform excitation tests on the hydraulic mount at frequencies of 8 Hz to 15 Hz with a test amplitude of ±4 mm, and obtain the test data of the hydraulic mount under each frequency excitation within the range of 8 Hz to 15 Hz.

[0060] In this embodiment, the test load is F 1 , the test amplitude is ±4 mm, and the preset frequency range of 8 Hz to 15 Hz are only for illustrative purposes. In other embodiments, the test load, test amplitude, and preset frequency range can also be other values, which will not be elaborated here.

[0061] S30: Determine the noise prediction result of the hydraulic mount according to the test data of the hydraulic mount under different frequency excitations.

[0062] After obtaining the test data of the hydraulic mount under different frequency excitations, determine the noise prediction result of the hydraulic mount according to the test data of the hydraulic mount under different frequency excitations, so that developers can improve the hydraulic mount according to the noise prediction result of the hydraulic mount, reduce the noise risk of the hydraulic mount, and thus avoid or reduce the problems of difficult modification or insufficient R & D cycle caused by modifying the hydraulic mount after the vehicle design is finalized in the later stage. In the early stage of hydraulic mount design, it no longer depends on vehicle NVH tests for identification, and has the characteristics of high efficiency and speed.

[0063] In this embodiment, by arranging the hydraulic mount on the test bench and obtaining the test load of the hydraulic mount through a preset simulation model, the preset simulation model includes the model corresponding to the hydraulic mount, and then through the test bench, applying a test load, a test amplitude, and excitations at different frequencies within a preset frequency range to the hydraulic device located on the test bench to perform excitation tests on the hydraulic mount, and obtaining the test data of the hydraulic mount under excitations at different frequencies. Furthermore, according to the test data of the hydraulic mount under excitations at different frequencies, the noise prediction result of the hydraulic mount is determined. By conducting the bench test of the hydraulic mount, using the simulated load as the test load, and performing excitation tests on the hydraulic mount in advance at different frequencies to obtain the noise prediction result of the hydraulic mount, the problem that the hydraulic mount needs to be tested on the whole vehicle, resulting in the inability to perform the noise test of the hydraulic mount in advance, is solved. The noise test of the hydraulic mount can be carried out without the whole vehicle, so that subsequent developers can improve the hydraulic mount in advance according to the noise prediction result. After the first batch of hydraulic mount samples are produced, the noise of the hydraulic mount can be tested on the bench, without waiting for the completion of the production of the prototype vehicle in the certification and production preparation stage for the whole vehicle test, saving time, accelerating the progress of the whole vehicle development, and at the same time improving the accuracy of the noise test of the hydraulic mount.

[0064] In one embodiment, as Figure 2 shown, in step S20, that is, performing excitation tests on the hydraulic mount according to the test load, the test amplitude, and different frequencies within the preset frequency range, and obtaining the test data of the hydraulic mount under excitations at different frequencies, specifically includes the following steps:

[0065] S21: Preheating the hydraulic mount according to the test load, the test amplitude, and the preheating frequency, and preheating to the first preset duration.

[0066] Before performing excitation tests on the hydraulic mount at different frequencies and obtaining the test data of the hydraulic mount under excitations at different frequencies, it is necessary to preheat the hydraulic mount to make the hydraulic mount enter the working state to improve the accuracy of the test data.

[0067] Therefore, it is necessary to first preheat the hydraulic mount according to the test load, the test amplitude, and the preheating frequency, and preheat to the first preset duration.

[0068] For example, the preheating frequency f 0 is 10 Hz, the first preset duration t 0 is 5 min, the test load is F 1 , the test amplitude A is ±4 mm. After applying the preload F 1 to the hydraulic mount on the test bench, run at an amplitude of ±4 mm and a frequency of 10 Hz for 5 minutes to preheat the hydraulic mount to enter the working state.

[0069] In this embodiment, the preheating frequency is 10 Hz and the first preset duration is 5 min, which are only for illustrative purposes. In other embodiments, the preheating frequency can also be other frequencies and the first preset duration can also be other durations, which will not be elaborated here.

[0070] S22: Keep the test load and test amplitude unchanged, and perform excitation tests on the hydraulic mount at different frequencies in sequence according to the preset frequency range to obtain the test data of the hydraulic mount under different frequency excitations.

[0071] After preheating the hydraulic mount according to the test load, test amplitude and preheating frequency until the first preset duration, keep the test load and the test amplitude unchanged, and perform excitation tests on the hydraulic mount at different frequencies in sequence according to the preset frequency range to obtain the test data of the hydraulic mount under different frequency excitations.

[0072] For example, after preheating the hydraulic mount, keep the test load of the hydraulic mount as F 1 and the test amplitude as ±4 mm, and perform excitation tests on the hydraulic mount at different frequencies from 8 Hz to 15 Hz respectively. Each frequency is tested separately, and the test data of the hydraulic mount at each frequency is recorded.

[0073] In this embodiment, the hydraulic mount is preheated according to the test load, test amplitude and preheating frequency until the first preset duration, and then the test load and test amplitude are kept unchanged. Excitation tests are performed on the hydraulic mount at different frequencies in sequence according to the preset frequency range to obtain the test data of the hydraulic mount under different frequency excitations. Before performing excitation tests on the hydraulic mount at different frequencies and obtaining the test data of the hydraulic mount under different frequency excitations, preheating the hydraulic mount enables the hydraulic mount to enter the working state, more accurately simulates the actual working state of the hydraulic mount, and improves the accuracy of the test data.

[0074] In one embodiment, as Figure 3 shown, in step S22, that is, keeping the test load and test amplitude unchanged, performing excitation tests on the hydraulic mount at different frequencies in sequence according to the preset frequency range to obtain the test data of the hydraulic mount under different frequency excitations, specifically includes the following steps:

[0075] a. Fix the frequency of the hydraulic mount, and the frequency of the hydraulic mount is within the preset frequency range.

[0076] For example, the preset frequency range is 8 Hz to 15 Hz, and first fix the frequency of the hydraulic mount at 8 Hz.

[0077] b. Keep the test load and test amplitude unchanged, perform the excitation test and start timing.

[0078] After preheating the hydraulic mount, keep the test load of the hydraulic mount as F 1 and the test amplitude as ±4 mm, and perform an excitation test on the hydraulic mount at a frequency of 8 Hz and time it. Record the test data of the hydraulic mount at a frequency of 8 Hz.

[0079] c. Collect the force load signal of the passive end of the hydraulic mount during the excitation test at a preset sampling rate.

[0080] wherein, the preset sampling rate f s is a sampling rate not lower than 2048 Hz to improve the accuracy of the sampled data.

[0081] For example, record the force load signal F of the passive end of the hydraulic mount at a sampling rate not lower than 2048 Hz, wherein the recording duration is not less than the second preset duration.

[0082] d. Take the force load signal collected within the second preset duration as the test data under the excitation of the current frequency.

[0083] For example, the second preset duration is 10 s. After recording the force load signal F of the passive end of the hydraulic mount at a sampling rate not lower than 2048 Hz and the recording duration is not less than 10 s, take the force load signal F collected within 10 s as the test data under the excitation of 8 Hz.

[0084] In this embodiment, the second preset duration being 10 s is only for illustrative purposes. In other embodiments, the second preset duration can also be other durations, which will not be elaborated here.

[0085] e. Change the frequency of the hydraulic mount, and loop through steps b - d to obtain the test data of the hydraulic mount under different frequency excitations.

[0086] Change the frequency of the hydraulic mount, and loop through steps b - d to test the hydraulic mount to obtain the test data of the hydraulic mount under different frequency excitations within a preset frequency range.

[0087] In this embodiment, by fixing the frequency of the hydraulic mount within the preset frequency range, keeping the test load and test amplitude unchanged, performing an excitation test and timing, collecting the force load signal of the passive end of the hydraulic mount during the excitation test at a preset sampling rate, taking the force load signal collected within the second preset duration as the test data under the excitation of the current frequency, and changing the frequency of the hydraulic mount and looping through steps b - d to obtain the test data of the hydraulic mount under different frequency excitations, the steps of obtaining the test data of the hydraulic mount under different frequency excitations are further refined, and the accuracy of the test data is further improved.

[0088] In one embodiment, in step S30, that is, determining the noise prediction result of the hydraulic mount according to the test data of the hydraulic mount under different frequency excitations, specifically includes the following steps:

[0089] S31: Filter the test data of the hydraulic mount under different frequency excitations to obtain the filtered data of the hydraulic mount under different frequency excitations.

[0090] For example, after obtaining the test data at frequencies from 8 Hz to 15 Hz, filter the test data under each frequency excitation to obtain the filtered data of the hydraulic mount under the frequency excitation from 8 Hz to 15 Hz.

[0091] S32: Determine the noise prediction result of the hydraulic mount according to the filtered data of the hydraulic mount under different frequency excitations.

[0092] After obtaining the filtered data of the hydraulic mount under different frequency excitations, then determine the noise prediction result of the hydraulic mount according to the filtered data of the hydraulic mount under different frequency excitations.

[0093] In this embodiment, in obtaining the test data of the hydraulic mount under different frequency excitations, filter the test data of the hydraulic mount under different frequency excitations to obtain the filtered data of the hydraulic mount under different frequency excitations, and determine the noise prediction result of the hydraulic mount according to the filtered data of the hydraulic mount under different frequency excitations. Filter the test data of the hydraulic mount, and then determine the noise prediction result of the hydraulic mount according to the filtered data, reducing the interference of other factors in the bench test process of the hydraulic mount and improving the accuracy of the noise prediction result.

[0094] In one embodiment, in step S31, that is, filtering the test data of the hydraulic mount under different frequency excitations to obtain the filtered data of the hydraulic mount under different frequency excitations, specifically includes the following steps:

[0095] S311: Extract the test data under each frequency excitation to obtain the effective noise data under each frequency excitation, and the effective noise data is the test data at a preset moment within a second preset duration.

[0096] Before filtering the test data of the hydraulic mount under different frequency excitations, it is necessary to extract the test data under each frequency excitation, eliminate the inaccurate test data in the test data, and retain the valid test data as the effective noise data. Among them, in the test data at each frequency, the effective noise data is usually the test data at a preset moment within a second preset duration.

[0097] For example, the preset time is from 5 s to 10 s. If the force load signal F collected within 10 s is used as the test data under each frequency excitation, the effective noise data at each frequency is the data in the time period from 5 s to 10 s of the test data at each frequency, and the data duration of the effective noise data at each frequency is 5 s.

[0098] In this embodiment, the preset time from 5 s to 10 s is only for illustrative purposes. In other embodiments, the preset time from 5 s to 10 s may also be other times, which will not be elaborated here.

[0099] S312: Filter the effective noise data under each frequency excitation according to the preset filtering frequency to obtain the filtered data of the hydraulic mount under different frequency excitations.

[0100] After obtaining the effective noise data under each frequency excitation, filter the effective noise data under each frequency excitation according to the preset filtering frequency to obtain the filtered data of the hydraulic mount under different frequency excitations.

[0101] For example, the preset filtering frequency is 100 Hz. After obtaining the effective noise data under each frequency excitation, perform a high-pass filtering of 100 Hz on the effective noise data under each frequency excitation to obtain the filtered data of the hydraulic mount under different frequency excitations.

[0102] In this embodiment, the preset filtering frequency of 100 Hz and the high-pass filtering method are only for illustrative purposes. In other embodiments, the preset filtering frequency may also be other filtering frequencies, and the filtering method may also be other, which will not be elaborated here.

[0103] In this embodiment, by extracting the test data under each frequency excitation, the effective noise data under each frequency excitation is obtained. The effective noise data is the test data at the preset time within the second preset duration. Filter the effective noise data under each frequency excitation according to the preset filtering frequency to obtain the filtered data of the hydraulic mount under different frequency excitations, further refining the process of obtaining the filtered data of the hydraulic mount under different frequency excitations, eliminating the inaccurate test data in the test data, retaining the valid test data as the effective noise data, and filtering the effective noise data under each frequency excitation with the preset filtering frequency, improving the accuracy of the subsequent noise prediction results.

[0104] In one embodiment, in step S32, that is, determining the noise prediction result of the hydraulic mount according to the filtered data of the hydraulic mount under different frequency excitations, specifically includes the following steps:

[0105] S321: Eliminate the data within the third preset duration in the filtered data under each frequency excitation to obtain the target data under each frequency excitation.

[0106] After obtaining the filtered data of the hydraulic mount under different frequency excitations, eliminate the data of the third preset duration in the filtered data under each frequency excitation, and obtain the target data under each frequency excitation.

[0107] For example, the third preset duration is 0s to 1s. If the data duration of the effective noise data at each frequency is 5s, then the data duration of the filtered data at each frequency is also 5s. Eliminate the data from 0s to 1s in the filtered data under each frequency excitation, and retain the data of the latter 4s as the target data under each frequency excitation.

[0108] In this embodiment, the third preset duration of 0s to 1s is only for illustrative purposes. In other embodiments, the third preset duration can also be other durations, which will not be elaborated here.

[0109] S322: Determine the maximum value and the minimum value of the target data under each frequency excitation, and determine the target data amplitude under each frequency excitation according to the maximum value and the minimum value.

[0110] After obtaining the target data under each frequency excitation, determine the maximum value Fmax and the minimum value Fmin of the target data under each frequency excitation, and then determine the target data amplitude under each frequency excitation according to the maximum value Fmax and the minimum value Fmin. Among them, the calculation formula for the target data amplitude is: F i =(Fmax - Fmin) / 2, F i is the target data amplitude at a certain frequency.

[0111] S323: Calculate the average value of all target data amplitudes according to the target data amplitudes under each frequency excitation, and use it as the noise prediction result of the hydraulic mount.

[0112] After determining the target data amplitude under each frequency excitation according to the maximum value and the minimum value, calculate the average value of all target data amplitudes according to the target data amplitudes under each frequency excitation, and use it as the noise prediction result of the hydraulic mount.

[0113] For example, if the preset frequency range is 8Hz to 15Hz, then the noise prediction result of the hydraulic mount at 8Hz to 15Hz is: F a is the noise prediction result of the hydraulic mount at 8Hz to 15Hz.

[0114] In this embodiment, after obtaining the filtered data of the hydraulic mount under different frequency excitations, the data within the third preset duration in the filtered data under each frequency excitation is removed to obtain the target data under each frequency excitation. Then, the maximum value and the minimum value of the target data under each frequency excitation are determined, and the amplitude of the target data under each frequency excitation is determined based on the maximum value and the minimum value. Finally, the average value of all the target data amplitudes is calculated based on the target data amplitudes under each frequency excitation, and used as the noise prediction result of the hydraulic mount. This further refines the process of determining the noise prediction result of the hydraulic mount based on the filtered data of the hydraulic mount under different frequency excitations. Further, the filtered data under each frequency excitation is extracted as the target data, so as to calculate the average value of all the target data amplitudes based on the target data amplitudes under each frequency excitation and use it as the noise prediction result of the hydraulic mount, improving the accuracy of the noise prediction result.

[0115] In one embodiment, after step S30, that is, after determining the noise prediction result of the hydraulic mount according to the test data of the hydraulic mount under different frequency excitations, it is also necessary to determine the noise risk level of the hydraulic mount according to the noise prediction result, which specifically includes the following steps:

[0116] S41: If the noise prediction result of the hydraulic mount is less than or equal to the first preset value, the noise risk level of the hydraulic mount is risk-free.

[0117] In this embodiment, the noise risk is divided into four intervals:

[0118] [0, α] is the risk-free area;

[0119] [α, β] is the low-risk area;

[0120] [β, γ] is the high-risk area;

[0121] [γ, +∞) is the unacceptable area.

[0122] Among them, α < β < γ, α is the first preset value, β is the second preset value, and γ is the third preset.

[0123] If the noise prediction result of the hydraulic mount is less than or equal to the first preset value and the noise prediction result of the hydraulic mount is in the risk-free area, the noise risk level of the hydraulic mount is risk-free.

[0124] For example, if α is 50N, and if the noise prediction result of the hydraulic mount is less than or equal to 50N and the noise prediction result of the hydraulic mount is in the risk-free area, the noise risk level of the hydraulic mount is risk-free.

[0125] S42: If the noise prediction result of the hydraulic mount is greater than the first preset value and less than or equal to the second preset value, the noise risk level of the hydraulic mount is low risk.

[0126] If the noise prediction result of the hydraulic mount is greater than the first preset value and less than or equal to the second preset value, and the noise prediction result of the hydraulic mount is in the low-risk area, the noise risk level of the hydraulic mount is low risk.

[0127] For example, if α is 50N and β is 70N, and if the noise prediction result of the hydraulic mount is greater than 50N and less than or equal to 70N, and the noise prediction result of the hydraulic mount is in the low-risk area, the noise risk level of the hydraulic mount is low risk.

[0128] S43: If the noise prediction result of the hydraulic mount is greater than the second preset value and less than or equal to the third preset value, the noise risk level of the hydraulic mount is high risk.

[0129] If the noise prediction result of the hydraulic mount is greater than the second preset value and less than or equal to the third preset value, and the noise prediction result of the hydraulic mount is in the high-risk area, the noise risk level of the hydraulic mount is high risk.

[0130] For example, if β is 70N and γ is 100N, and if the noise prediction result of the hydraulic mount is greater than 70N and less than or equal to 100N, and the noise prediction result of the hydraulic mount is in the high-risk area, the noise risk level of the hydraulic mount is high risk.

[0131] S44: If the noise prediction result of the hydraulic mount is greater than the third preset value, the noise risk level of the hydraulic mount is unacceptable.

[0132] For example, if the noise prediction result of the hydraulic mount is greater than 100N, and the noise prediction result of the hydraulic mount is in the unacceptable area, the noise risk level of the hydraulic mount is unacceptable.

[0133] After conducting bench tests on the first batch of samples of the hydraulic mount and obtaining the noise prediction result, it is required that the noise prediction result of the hydraulic mount is at least less than or equal to the second preset value β, that is, the noise prediction result of the hydraulic mount cannot be higher than the low-risk area to reduce the later noise risk of the hydraulic mount. If the noise prediction result of the hydraulic mount is in the low-risk area, during the product verification stage, according to the vehicle NVH performance requirements for the lag angle and dynamic stiffness of the hydraulic mount, gradually reduce the noise prediction result of the hydraulic mount to the risk-free area, or compromise and maintain it in the low-risk area; if the noise prediction result of the hydraulic mount is greater than the second preset value β, immediately improve the structure of the hydraulic mount. After improving the structure of the hydraulic mount, conduct bench tests again until the noise prediction result of the hydraulic mount is less than or equal to the second preset value β.

[0134] In this embodiment, after obtaining the noise prediction result of the hydraulic mount, the noise risk level of the hydraulic mount is determined according to the noise prediction result, and the noise risk level is divided into four levels, which provides a great deal of design flexibility for developers. This enables developers to timely adjust and improve the hydraulic mount according to the risk level of the noise prediction result of the hydraulic mount, so that the performance of the hydraulic mount meets the requirements, reducing the problems of difficult modification or insufficient R & D cycle caused by improving the hydraulic mount after the vehicle design is debugged and finalized in the later stage. In the early stage of hydraulic mount design, it no longer depends on the vehicle NVH test for identification, featuring high efficiency and speed, and accelerating the progress of vehicle development.

[0135] It should be understood that the magnitudes of the sequence numbers of the steps in the above embodiments do not imply the order of execution. The order of execution of each process should be determined according to its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

[0136] In one embodiment, a noise prediction device for a hydraulic mount is provided, and the noise prediction device for the hydraulic mount corresponds one-to-one with the noise prediction method of the hydraulic mount in the above embodiment. As Figure 4 shown, the hydraulic mount is arranged on a test bench, and the noise prediction device for the hydraulic mount includes an acquisition module 401, a test module 402, and a determination module 403. The detailed descriptions of each functional module are as follows:

[0137] The acquisition module 401 is configured to obtain the test load of the hydraulic mount through a preset simulation model, and the preset simulation model includes the model corresponding to the hydraulic mount;

[0138] The test module 402 is configured to perform excitation tests on the hydraulic mount according to the test load, test amplitude, and different frequencies within a preset frequency range, and obtain the test data of the hydraulic mount under different frequency excitations;

[0139] The determination module 403 is configured to determine the noise prediction result of the hydraulic mount according to the test data of the hydraulic mount under different frequency excitations.

[0140] Further, the test module 402 is specifically configured to:

[0141] Preheat the hydraulic mount according to the test load, the test amplitude, and the preheating frequency, and preheat it to a first preset duration;

[0142] Keep the test load and the test amplitude unchanged, and perform excitation tests on the hydraulic mount at different frequencies in sequence according to the preset frequency range, and obtain the test data of the hydraulic mount under different frequency excitations.

[0143] Further, the test module 402 is specifically further configured to:

[0144] a. fixing the frequency of the hydraulic mount, wherein the frequency of the hydraulic mount is within the preset frequency range;

[0145] b. Keeping the test load and the test amplitude unchanged, performing the excitation test and timing;

[0146] c. collecting the force load signal of the passive end of the hydraulic mount during the excitation test at a preset sampling rate;

[0147] d. using the force load signal collected within the second preset time as test data under the current frequency excitation;

[0148] e. Changing the frequency of the hydraulic mount, and looping steps b to d to obtain test data of the hydraulic mount under different frequency excitations.

[0149] Furthermore, the determining module 403 is specifically configured to:

[0150] Filtering the test data of the hydraulic mount under different frequency excitations to obtain filtered data of the hydraulic mount under different frequency excitations;

[0151] The noise prediction result of the hydraulic mount is determined according to the filtering data of the hydraulic mount under different frequency excitations.

[0152] Furthermore, the determining module 403 is further specifically configured to:

[0153] Extracting the test data under each frequency excitation to obtain effective noise data under each frequency excitation, wherein the effective noise data is the test data at a preset time within the second preset time period;

[0154] The effective noise data under each frequency excitation is filtered according to a preset filtering frequency to obtain the filtering data of the hydraulic mount under different frequency excitations.

[0155] Furthermore, the determining module 403 is further specifically configured to:

[0156] Eliminate the data of the third preset time length in the filtered data under each frequency excitation, and obtain the target data under each frequency excitation;

[0157] Determine the maximum value and the minimum value of the target data under each frequency excitation, and determine the amplitude of the target data under each frequency excitation according to the maximum value and the minimum value;

[0158] The average value of all target data amplitudes is calculated according to the target data amplitudes under each frequency excitation as the noise prediction result of the hydraulic mount.

[0159] Furthermore, the determining module 403 is further specifically configured to:

[0160] If the noise prediction result of the hydraulic mount is less than or equal to the first preset value, the noise risk level of the hydraulic mount is risk-free;

[0161] If the noise prediction result of the hydraulic mount is greater than the first preset value and less than or equal to the second preset value, the noise risk level of the hydraulic mount is low risk;

[0162] If the noise prediction result of the hydraulic mount is greater than the second preset value and less than or equal to the third preset value, the noise risk level of the hydraulic mount is high risk;

[0163] If the noise prediction result of the hydraulic mount is greater than the third preset value, the noise risk level of the hydraulic mount is unacceptable.

[0164] For the specific limitations of the noise prediction device of the hydraulic mount, reference can be made to the limitations of the noise prediction method of the hydraulic mount in the above text, which will not be elaborated here. Each module in the above noise prediction device of the hydraulic mount can be implemented in whole or in part by software, hardware and their combination. The above modules can be embedded in the processor of the computer device in the form of hardware or independent of it, or stored in the memory of the computer device in the form of software, so as to facilitate the processor to call and execute the operations corresponding to the above modules.

[0165] In one embodiment, a noise prediction device for a hydraulic mount is provided. The noise prediction device for the hydraulic mount may be a computer device. The noise prediction device for the hydraulic mount includes a processor, a memory, a network interface, a display screen and an input device connected through a system bus. Among them, the processor of the noise prediction device for the hydraulic mount is used to provide computing and control capabilities. The memory of the noise prediction device for the hydraulic mount includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the noise prediction device for the hydraulic mount is used to communicate with an external server through a network connection. When the computer program is executed by the processor, a noise prediction method for a hydraulic mount is implemented.

[0166] In one embodiment, as Figure 5 shown, a noise prediction device for a hydraulic mount is provided, including a memory, a processor and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the following steps are implemented:

[0167] Obtain the test load of the hydraulic mount through a preset simulation model, and the preset simulation model includes the model corresponding to the hydraulic mount;

[0168] Perform an excitation test on the hydraulic mount according to the test load, test amplitude, and different frequencies within a preset frequency range, and obtain the test data of the hydraulic mount under excitation at different frequencies;

[0169] Determine the noise prediction result of the hydraulic mount according to the test data of the hydraulic mount under excitation at different frequencies.

[0170] In one embodiment, a readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0171] Obtain the test load of the hydraulic mount through a preset simulation model, and the preset simulation model includes the model corresponding to the hydraulic mount;

[0172] Perform an excitation test on the hydraulic mount according to the test load, test amplitude, and different frequencies within a preset frequency range, and obtain the test data of the hydraulic mount under excitation at different frequencies;

[0173] Determine the noise prediction result of the hydraulic mount according to the test data of the hydraulic mount under excitation at different frequencies.

[0174] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, storage, database, or other medium used in the various embodiments provided in this application can include non-volatile and / or volatile memories. Non-volatile memories can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memories can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0175] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of each functional unit and module is used as an example. In actual applications, the above functions can be allocated to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0176] The above-described embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A method for predicting the noise of a hydraulic mount, characterized in that, the hydraulic mount is arranged on a test bench, and the method includes: obtaining the test load of the hydraulic mount through a preset simulation model, where the preset simulation model includes the model corresponding to the hydraulic mount; performing excitation tests on the hydraulic mount according to the test load, test amplitude, and different frequencies within a preset frequency range, and obtaining the test data of the hydraulic mount under different frequency excitations; determining the noise prediction result of the hydraulic mount according to the test data of the hydraulic mount under different frequency excitations; the performing excitation tests on the hydraulic mount according to the test load, test amplitude, and different frequencies within a preset frequency range, and obtaining the test data of the hydraulic mount under different frequency excitations includes: preheating the hydraulic mount according to the test load, the test amplitude, and a preheating frequency, and preheating to a first preset duration; keeping the test load and the test amplitude unchanged, and sequentially performing excitation tests on the hydraulic mount at different frequencies according to the preset frequency range, and obtaining the test data of the hydraulic mount under different frequency excitations; the keeping the test load and the test amplitude unchanged, and sequentially performing excitation tests on the hydraulic mount at different frequencies according to the preset frequency range, and obtaining the test data of the hydraulic mount under different frequency excitations includes: a. Fixing the frequency of the hydraulic mount, where the frequency of the hydraulic mount is within the preset frequency range; b. Keeping the test load and the test amplitude unchanged, performing an excitation test and timing; c. Collecting the force load signal of the passive end of the hydraulic mount during the excitation test at a preset sampling rate; d. Taking the force load signal collected within a second preset duration as the test data under the current frequency excitation; e. Changing the frequency of the hydraulic mount, and looping steps b - d to obtain the test data of the hydraulic mount under different frequency excitations.

2. The method for predicting the noise of a hydraulic mount according to claim 1, characterized in that, the determining the noise prediction result of the hydraulic mount according to the test data of the hydraulic mount under different frequency excitations includes: filtering the test data of the hydraulic mount under different frequency excitations to obtain the filtered data of the hydraulic mount under different frequency excitations; determining the noise prediction result of the hydraulic mount according to the filtered data of the hydraulic mount under different frequency excitations.

3. The method for predicting the noise of a hydraulic mount according to claim 2, characterized in that, the filtering the test data of the hydraulic mount under different frequency excitations to obtain the filtered data of the hydraulic mount under different frequency excitations: extracting the test data of each frequency excitation to obtain the effective noise data of each frequency excitation, where the effective noise data is the test data at a preset moment within the second preset duration; filtering the effective noise data of each frequency excitation according to a preset filtering frequency to obtain the filtered data of the hydraulic mount under different frequency excitations.

4. The method for predicting the noise of a hydraulic mount according to claim 3, It is characterized in that determining the noise prediction result of the hydraulic mount according to the filtering data of the hydraulic mount under different frequency excitations includes: eliminating the data within a third preset duration in the filtering data under each frequency excitation to obtain the target data under each frequency excitation; determining the maximum value and the minimum value of the target data under each frequency excitation, and determining the amplitude of the target data under each frequency excitation according to the maximum value and the minimum value; calculating the average value of all the target data amplitudes according to the target data amplitudes under each frequency excitation as the noise prediction result of the hydraulic mount.

5. The method for predicting the noise of a hydraulic mount according to any one of claims 1-4, it is characterized in that after determining the noise prediction result of the hydraulic mount according to the test data of the hydraulic mount under different frequency excitations, the method further includes: if the noise prediction result of the hydraulic mount is less than or equal to a first preset value, the noise risk level of the hydraulic mount is risk-free; if the noise prediction result of the hydraulic mount is greater than the first preset value and less than or equal to a second preset value, the noise risk level of the hydraulic mount is low risk; if the noise prediction result of the hydraulic mount is greater than the second preset value and less than or equal to a third preset value, the noise risk level of the hydraulic mount is high risk; if the noise prediction result of the hydraulic mount is greater than the third preset value, the noise risk level of the hydraulic mount is unacceptable.

6. A device for predicting the noise of a hydraulic mount, it is characterized in that the hydraulic mount is arranged on a test bench, and the device includes: an acquisition module, configured to acquire the test load of the hydraulic mount through a preset simulation model, and the preset simulation model includes the model corresponding to the hydraulic mount; a test module, configured to perform excitation tests on the hydraulic mount according to the test load, the test amplitude, and different frequencies within a preset frequency range, and acquire the test data of the hydraulic mount under different frequency excitations; a determination module, configured to determine the noise prediction result of the hydraulic mount according to the test data of the hydraulic mount under different frequency excitations; performing excitation tests on the hydraulic mount according to the test load, the test amplitude, and different frequencies within a preset frequency range, and acquiring the test data of the hydraulic mount under different frequency excitations includes: preheating the hydraulic mount according to the test load, the test amplitude, and the preheating frequency for a first preset duration; keeping the test load and the test amplitude unchanged, and sequentially performing excitation tests on the hydraulic mount according to the preset frequency range to acquire the test data of the hydraulic mount under different frequency excitations; keeping the test load and the test amplitude unchanged, and sequentially performing excitation tests on the hydraulic mount according to the preset frequency range to acquire the test data of the hydraulic mount under different frequency excitations includes: a. Fixing the frequency of the hydraulic mount, and the frequency of the hydraulic mount is within the preset frequency range; b. Keeping the test load and the test amplitude unchanged, performing excitation tests and timing; c. Collect the force load signal of the passive end of the hydraulic mount during the excitation test at a preset sampling rate; d. Use the force load signal collected within the second preset time period as the test data under the current frequency excitation; e. Change the frequency of the hydraulic mount, and loop through steps b - d to obtain the test data of the hydraulic mount under different frequency excitations.

7. A hydraulic mount noise prediction device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, when the processor executes the computer program, it implements the steps of the noise prediction method of the hydraulic mount according to any one of claims 1 to 5.

8. A readable storage medium storing a computer program, characterized in that, when the computer program is executed by a processor, it implements the steps of the noise prediction method of the hydraulic mount according to any one of claims 1 to 5.

Images