Wheel NVH performance evaluation method and device, vehicle and storage medium

Abstract

The invention relates to the technical field of vehicle part performance testing, in particular to a wheel NVH performance evaluation method and device, a vehicle and a storage medium. The method comprises the following steps: acquiring vibration data of a wheel center and vibration data of a tread of a to-be-detected wheel; calculating a frequency response between the wheel center and the tread based on the vibration data of the wheel center and the vibration data of the tread; and calculating a displacement transfer function of the to-be-tested wheel based on the frequency response between the wheel center and the tread, and obtaining an NVH performance evaluation result of the to-be-tested wheel according to the displacement transfer function. Therefore, by using the displacement transfer function as the NVH index of the wheel, the problem of inaccurate evaluation of the NVH performance of the wheel caused by using the force transfer rate as the NVH index of the wheel in the prior art is solved, and the reliability of the performance evaluation result is improved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle component performance testing, and in particular to a method, device, vehicle and storage medium for evaluating the NVH (Noise Vibration Harshness) performance of a wheel. Background Art

[0002] In the development of the modern vehicle industry, the ride comfort and quietness of a vehicle have become key indicators for measuring vehicle quality. Among them, wheels, as an important part of the vehicle's driving system, have a crucial impact on the NVH performance of the entire vehicle.

[0003] In related technologies, when discussing the NVH performance of a vehicle, people usually focus on the structural transmission noise of the wheels. Currently, the NVH performance of the wheels is mainly measured by the force transmission rate.

[0004] However, under the condition of uniform speed driving, the input to the wheel is actually the displacement excitation of the road surface, that is, the relative displacement between the wheel and the road surface will generate force, and this force will change with the change of vehicle state. Therefore, this method is not completely applicable to the condition of uniform speed driving, which leads to inaccurate NVH performance evaluation, which needs to be solved urgently. Summary of the invention

[0005] The present application provides a method, device, vehicle and storage medium for evaluating the NVH performance of a wheel, so as to solve the problem that the prior art uses force transfer rate as the NVH indicator of the wheel, resulting in inaccurate evaluation of the NVH performance of the wheel, and improve the reliability of the performance evaluation results.

[0006] To achieve the above-mentioned purpose, the first embodiment of the present application proposes a method for evaluating the NVH performance of a wheel, comprising the following steps:

[0007] Acquiring vibration data of the wheel center and the tread of the wheel to be tested;

[0008] Calculating a frequency response between the wheel center and the tread based on the vibration data of the wheel center and the vibration data of the tread;

[0009] Based on the frequency response between the wheel center and the tread, the displacement transfer function of the wheel to be tested is calculated, and the NVH performance evaluation result of the wheel to be tested is obtained according to the displacement transfer function.

[0010] According to one embodiment of the present application, the displacement transfer function of the wheel to be tested is:

[0011]

[0012] Where ω is the circular frequency, Hcc is the frequency response of the wheel center origin, H cp is the frequency response from the tread to the wheel center, H pp is the frequency response of the tread origin, H pc is the frequency response from the wheel center to the tread.

[0013] According to one embodiment of the present application, before obtaining the vibration data of the wheel center and the vibration data of the tread of the wheel to be tested, the method further includes:

[0014] Constructing a performance test bench, wherein the performance test bench comprises a test tray for placing the wheel to be tested and a drive motor;

[0015] Using the driving motor to drive the test tray to rotate, so that the rotation speed of the test tray reaches a preset rotation speed and is in a preset stable state;

[0016] According to the preset excitation points, excitation is applied to the wheel center and the tread respectively to obtain vibration data of the wheel center and vibration data of the tread.

[0017] According to an embodiment of the present application, the wheel to be tested is mounted on the test tray via a flexible connection device.

[0018] According to an embodiment of the present application, the preset excitation points include three linear directions and three rotational directions of the wheel center and the tread, respectively.

[0019] According to the NVH performance evaluation method of the wheel proposed in the embodiment of the present application, the frequency response between the wheel center and the tread can be calculated based on the vibration data of the wheel center and the vibration data of the tread; based on the frequency response between the wheel center and the tread, the displacement transfer function of the wheel to be tested can be calculated, and the NVH performance evaluation result of the wheel to be tested can be obtained according to the displacement transfer function. Therefore, by using the displacement transfer function as the NVH index of the wheel, the problem of inaccurate evaluation of the NVH performance of the wheel caused by using the force transfer rate as the NVH index of the wheel in the prior art is solved, and the reliability of the performance evaluation result is improved.

[0020] To achieve the above-mentioned purpose, a second embodiment of the present application provides a wheel NVH performance evaluation device, comprising:

[0021] An acquisition module, used to acquire the vibration data of the wheel center and the vibration data of the tread of the wheel to be tested;

[0022] A calculation module, configured to calculate a frequency response between the wheel center and the tread based on the vibration data of the wheel center and the vibration data of the tread;

[0023] An evaluation module is used to calculate the displacement transfer function of the wheel to be tested based on the frequency response between the wheel center and the tread, and obtain the NVH performance evaluation result of the wheel to be tested according to the displacement transfer function.

[0024] According to one embodiment of the present application, the displacement transfer function of the wheel to be tested is:

[0025]

[0026] Where ω is the circular frequency, H cc is the frequency response of the wheel center origin, H cp is the frequency response from the tread to the wheel center, H pp is the frequency response of the tread origin, H pc is the frequency response from the wheel center to the tread.

[0027] According to an embodiment of the present application, before obtaining the vibration data of the wheel center and the vibration data of the tread of the wheel to be tested, the obtaining module is further used to:

[0028] Constructing a performance test bench, wherein the performance test bench comprises a test tray for placing the wheel to be tested and a drive motor;

[0029] Using the driving motor to drive the test tray to rotate, so that the rotation speed of the test tray reaches a preset rotation speed and is in a preset stable state;

[0030] According to the preset excitation points, excitation is applied to the wheel center and the tread respectively to obtain vibration data of the wheel center and vibration data of the tread.

[0031] According to an embodiment of the present application, the wheel to be tested is mounted on the test tray via a flexible connection device.

[0032] According to an embodiment of the present application, the preset excitation points include three linear directions and three rotational directions of the wheel center and the tread, respectively.

[0033] According to the NVH performance evaluation device for a wheel proposed in the embodiment of the present application, the frequency response between the wheel center and the tread can be calculated based on the vibration data of the wheel center and the vibration data of the tread; based on the frequency response between the wheel center and the tread, the displacement transfer function of the wheel to be tested can be calculated, and the NVH performance evaluation result of the wheel to be tested can be obtained according to the displacement transfer function. Therefore, by using the displacement transfer function as the NVH index of the wheel, the problem of inaccurate evaluation of the NVH performance of the wheel caused by using the force transfer rate as the NVH index of the wheel in the prior art is solved, and the reliability of the performance evaluation result is improved.

[0034] To achieve the above objectives, the third aspect of the present application proposes a vehicle, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the NVH performance evaluation method of the wheel as described in the above embodiment.

[0035] To achieve the above objectives, the fourth aspect of the present application proposes a computer-readable storage medium having a computer program stored thereon, which is executed by a processor to implement the NVH performance evaluation method of the wheel as described in the above embodiments.

[0036] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0038] Figure 1 A flowchart of a method for evaluating NVH performance of a wheel provided according to an embodiment of the present application;

[0039] Figure 2 A schematic diagram of a method for evaluating the NVH performance of a wheel in the related art;

[0040] Figure 3 is a schematic diagram of a performance test bench according to an embodiment of the present application;

[0041] Figure 4 is a flow chart of a method for evaluating NVH performance of a wheel according to another embodiment of the present application;

[0042] Figure 5 A schematic diagram showing the consistency comparison between the force transmission rate and the noise response inside the vehicle in the related art;

[0043] Figure 6 A schematic diagram showing the consistency comparison between the displacement transfer function and the in-vehicle noise response according to an embodiment of the present application;

[0044] Figure 7 It is a block diagram of a device for evaluating the NVH performance of a wheel provided in an embodiment of the present application;

[0045] Figure 8 It is a schematic diagram of the structure of a vehicle provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0046] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0047] The following describes the NVH performance evaluation method, device, vehicle and storage medium of the wheel proposed in the embodiments of the present application with reference to the accompanying drawings.

[0048] Figure 1 It is a flow chart of a method for evaluating the NVH performance of a wheel according to an embodiment of the present application.

[0049] Before introducing the NVH performance evaluation method of the wheel proposed in the embodiment of the present application, the NVH performance evaluation method of the wheel in the related art is first introduced.

[0050] In terms of structure-borne noise, the force transmission rate is the most commonly used indicator when discussing the NVH performance of wheels. Figure 2 As shown, the dynamic stiffness at the origin of the input point is measured and used as the dividend to calculate the force transfer rate. In the waveform of the force transfer rate, the position and amplitude of the trough will directly affect the amplitude and position of the peak.

[0051] However, when performing IPI (Input Point Inertance) testing, it is relatively difficult to measure the trough. In addition, the force transfer rate has two major disadvantages: (1) the force transfer rate is usually obtained from static tests, which means that it may not fully and accurately reflect the actual situation under dynamic conditions; (2) in acceleration, braking, cornering and other working conditions, the input to the tire is mainly force. At this time, it is reasonable to use the force transfer rate indicator. However, under uniform driving conditions, the input actually received by the tire is displacement. The relative displacement between the wheel and the road surface will generate force, and this force will change with the change of the vehicle state. This leads to a low correlation between the force transfer rate indicator and the vibration and noise performance inside the vehicle. Therefore, the force-to-force transfer rate is not completely applicable to all working conditions.

[0052] Tire radiated sound power refers to the noise energy generated by the tire during rotation. This noise is transmitted to the outside world through the air. This indicator is very useful for developing acoustic wrapping materials that can absorb or isolate sound. However, this noise is different from the noise transmitted by the vehicle structure and the noise generated by vibration inside the car. Road noise mainly refers to the noise transmitted through the vehicle structure during the driving process. Therefore, considering only the noise radiated by the tire is not enough to fully develop and improve the NVH performance of the vehicle. In the actual development process, it is necessary to comprehensively consider multiple noise sources and transmission paths such as tire radiation noise, structure-transmitted noise, and in-vehicle vibration in order to effectively improve the overall NVH performance of the vehicle.

[0053] Based on the above problems, an embodiment of the present application proposes a method for evaluating the NVH performance of a wheel. By using the displacement transfer function as the NVH indicator of the wheel, it solves the problem that the prior art uses the force transfer rate as the NVH indicator of the wheel, resulting in inaccurate evaluation of the NVH performance of the wheel, thereby improving the reliability of the performance evaluation results.

[0054] The NVH performance evaluation method of the wheel will be described in detail below.

[0055] For example, Figure 1 As shown, the NVH performance evaluation method of the wheel includes the following steps:

[0056] In step S101, the vibration data of the wheel center and the vibration data of the tread of the wheel to be tested are obtained.

[0057] The wheel center vibration data refers to the vibration of the center part of the wheel during vehicle driving. As the support point of the wheel, the vibration of the wheel center can reflect the performance of the vehicle suspension system and the stability of vehicle driving. The tread vibration data refers to the vibration of the tire in contact with the ground during vehicle driving. This vibration data helps analyze the tire's grip performance, wear and adaptability to road conditions.

[0058] Next, how to obtain the vibration data of the wheel center and the vibration data of the tread of the wheel to be tested is described in detail.

[0059] As a possible implementation method, in some embodiments, before obtaining the vibration data of the wheel center and the vibration data of the tread of the wheel to be tested, it also includes: constructing a performance test bench, wherein the performance test bench includes a test tray for placing the wheel to be tested and a drive motor; using the drive motor to drive the test tray to rotate so that the rotation speed of the test tray reaches a preset rotation speed and is in a preset stable state; according to the preset excitation point, applying excitation to the wheel center and the tread respectively to obtain the vibration data of the wheel center and the vibration data of the tread.

[0060] Specifically, we first need to build a dedicated performance test bench, such as Figure 3 As shown, the performance test bench consists of multiple key components, including a drive motor, a data acquisition device, a test tray, a flexible connection device, a displacement exciter and an acceleration sensor. The wheel to be tested is placed on the test tray for subsequent testing; the function of the drive motor is to drive the test tray so that it can drive the wheel to be tested to rotate. When the speed of the test tray reaches the preset speed and remains in a stable state (i.e., in a preset stable state), the test can be started. According to the preset excitation point, the displacement exciter applies specific excitation to the wheel center and tread of the wheel to be tested respectively. This excitation is to simulate various vibration conditions that the wheel may encounter during actual driving. In this way, the performance of the wheel in actual use can be more accurately evaluated. In order to obtain relevant vibration data, the acceleration sensor will be used to monitor and record the acceleration of the wheel center and tread in real time. By analyzing these acceleration data, the vibration data of the wheel center and the vibration data of the tread can be obtained, so as to comprehensively evaluate the performance of the wheel.

[0061] Optionally, in some embodiments, the wheel to be tested is mounted on the test tray via a flexible connection device.

[0062] It is understandable that in order to ensure that the wheel to be tested can be in a relatively free state during the relevant tests to ensure the accuracy and reliability of the test results, a flexible connection device can be used to connect the wheel to be tested and the test tray. This flexible connection device can be an elastic and flexible device such as an air spring, which can absorb and buffer the impact and vibration from the wheel to a certain extent, so that the wheel can perform various movements more freely during the test without being disturbed by too much external force. As a result, the test results can more truly reflect the actual performance and status of the wheel.

[0063] Optionally, in some embodiments, the preset excitation points include three linear directions and three rotational directions of the wheel center and the tread, respectively.

[0064] Specifically, when designing and evaluating wheel performance, multiple excitation points are usually considered to ensure the stability and reliability of the wheel under various working conditions. In the embodiment of the present application, the preset excitation points include six directions of the wheel center and the tread. That is, the excitation points of the wheel center cover three linear directions, namely radial, axial and lateral directions along the wheel. These linear excitations help evaluate the reaction and performance of the tire when subjected to forces in different directions; in addition, the wheel center also contains three rotational excitations, namely radial, axial and lateral rotations around the tire. These rotational excitations help evaluate the stability and durability of the tire under different rotational states. Similarly, the excitation points of the tread also include three linear directions and three rotational directions. The linear direction excitation of the tread also involves radial, axial and lateral forces, which affect the contact and friction characteristics between the wheel and the ground; while the rotational direction excitation of the tread includes rotations around radial, axial and lateral directions. These rotational excitations help evaluate the grip and handling performance of the wheel under different rotational conditions. By comprehensively considering these linear and rotational excitation points of the wheel center and the tread, the performance of the wheel in actual use can be comprehensively evaluated.

[0065] In step S102, the frequency response between the wheel center and the tread is calculated based on the vibration data of the wheel center and the vibration data of the tread.

[0066] That is to say, by conducting a detailed analysis of the vibration data at the wheel center and the vibration data at the tread, the frequency response characteristics between the wheel center and the tread can be further calculated, including the frequency response at the wheel center origin, the frequency response from the tread to the wheel center, the frequency response at the tread origin, and the frequency response from the wheel center to the tread, so as to understand the transmission characteristics of wheel vibration at different frequencies and its impact on the performance of the entire vehicle.

[0067] In step S103, the displacement transfer function of the wheel to be tested is calculated based on the frequency response between the wheel center and the tread, and the NVH performance evaluation result of the wheel to be tested is obtained according to the displacement transfer function.

[0068] In some embodiments, the displacement transfer function of the wheel to be tested is:

[0069]

[0070] Where ω is the circular frequency (also called angular frequency, which is a physical quantity that describes the speed of angle change in vibration or fluctuation), H cc is the frequency response of the wheel center origin, H cp is the frequency response from the tread to the wheel center, H pp is the frequency response of the tread origin, H pc It is the frequency response from wheel center to tread.

[0071] It can be understood that the displacement transfer function is a function that describes the relationship between the input and output of the system, and it can reflect the change in the displacement of the wheel when it is subjected to vibration of a specific frequency.

[0072] In other words, by analyzing the frequency response between the wheel center and the tread of the wheel to be tested in detail, the displacement transfer function of the wheel to be tested can be calculated. After obtaining the displacement transfer function, the NVH performance of the wheel to be tested can be further analyzed. NVH stands for noise, vibration and harshness, and is an important indicator for measuring vehicle comfort and quality. By analyzing the displacement transfer function, the vibration characteristics of the wheel at different frequencies can be evaluated, thereby judging the quality of its NVH performance.

[0073] Specifically, the NVH performance of the wheel can be evaluated based on the amplitude-frequency characteristic and phase-frequency characteristic of the displacement transfer function. The amplitude-frequency characteristic reflects the vibration amplitude of the wheel at different frequencies, while the phase-frequency characteristic describes the phase change of the wheel vibration. By comprehensively analyzing these two characteristics, the NVH performance evaluation results of the wheel under various working conditions can be obtained.

[0074] This method can accurately evaluate the NVH performance of the wheel to be tested, providing an important reference for the design and improvement of the vehicle. This not only helps to improve the ride comfort of the vehicle, but also improves the overall quality and market competitiveness of the vehicle to a certain extent.

[0075] In order to facilitate those skilled in the art to further understand the NVH performance evaluation method of the wheel proposed in the embodiment of the present application, the following is combined with Figure 4-Figure 6 For further elaboration.

[0076] like Figure 4 As shown, the NVH performance evaluation method of the wheel may further include the following steps:

[0077] Step S401: The wheel to be tested is mounted on a test tray via an air spring.

[0078] Step S402, installing sensors and exciters.

[0079] Step S403: the driving motor drives the test tray and the wheel to be tested to rotate.

[0080] Step S404, obtaining the frequency response function of the wheel to be tested.

[0081] Step S405, calculating the displacement transfer function of the wheel to be tested.

[0082] Furthermore, if Figure 5 As shown, it can be seen that the consistency between the traditional index force transfer rate and the vehicle interior noise response is poor, such as Figure 6As shown, it can be seen that the displacement transfer function has a high consistency with the noise response inside the car, and the displacement transfer function can reflect most of the characteristic peaks inside the car. It can be seen that the method proposed in the embodiment of the present application is more suitable for evaluating the excitation given by the wheel to the suspension.

[0083] In addition, when the wheel is in a rotating state, due to the combined effects of centrifugal force and Coriolis force, the stress level of the belt layer will increase, the radial deformation will increase significantly, and the overall stiffness will increase, which will in turn cause a corresponding change in the modal frequency. Therefore, there is a significant difference between the frequency response characteristics obtained by static testing and the performance of the wheel in actual working conditions. The embodiment of the present application aims to provide an ability to test the frequency response characteristics of the wheel in a rotating state, and the effect of the rotation speed on the wheel mode is shown in Table 1. It can be seen that the displacement transfer function is used to characterize the wheel center force response caused by road displacement excitation, which conforms to the operating state of the wheel in actual work and can be used to evaluate the NVH performance of the wheel. This indicator has the characteristic of not relying on a specific vehicle, and therefore has a high reliability. By adopting this indicator, after determining the tire supplier, there is no need to produce a sample vehicle for assembly testing in advance, and the NVH performance evaluation can be directly performed based on the selected tire, which can effectively shorten the development cycle and reduce development costs.

[0084] According to the NVH performance evaluation method of the wheel proposed in the embodiment of the present application, the frequency response between the wheel center and the tread can be calculated based on the vibration data of the wheel center and the vibration data of the tread; based on the frequency response between the wheel center and the tread, the displacement transfer function of the wheel to be tested can be calculated, and the NVH performance evaluation result of the wheel to be tested can be obtained according to the displacement transfer function. Therefore, by using the displacement transfer function as the NVH index of the wheel, the problem of inaccurate evaluation of the NVH performance of the wheel caused by using the force transfer rate as the NVH index of the wheel in the prior art is solved, and the reliability of the performance evaluation result is improved.

[0085] Next, the NVH performance evaluation device of the wheel proposed in the embodiment of the present application is described with reference to the accompanying drawings.

[0086] Figure 7 It is a block diagram of an NVH performance evaluation device for a wheel according to an embodiment of the present application.

[0087] like Figure 7 As shown, the NVH performance evaluation device 10 of the wheel includes: an acquisition module 100 , a calculation module 200 and an evaluation module 300 .

[0088] The acquisition module 100 is used to acquire the vibration data of the wheel center and the vibration data of the tread of the wheel to be tested;

[0089] A calculation module 200, for calculating a frequency response between the wheel center and the tread based on the vibration data of the wheel center and the vibration data of the tread;

[0090] The evaluation module 300 is used to calculate the displacement transfer function of the wheel to be tested based on the frequency response between the wheel center and the tread, and obtain the NVH performance evaluation result of the wheel to be tested according to the displacement transfer function.

[0091] Furthermore, in some embodiments, the displacement transfer function of the wheel to be tested is:

[0092]

[0093] Where ω is the circular frequency, H cc is the frequency response of the wheel center origin, H cp is the frequency response from the tread to the wheel center, H pp is the frequency response of the tread origin, H pc It is the frequency response from wheel center to tread.

[0094] Furthermore, in some embodiments, before obtaining the vibration data of the wheel center and the vibration data of the tread of the wheel to be tested, the obtaining module 100 is further used to:

[0095] Constructing a performance test bench, wherein the performance test bench comprises a test tray for placing the wheel to be tested and a drive motor;

[0096] The test tray is driven to rotate by a driving motor so that the rotation speed of the test tray reaches a preset rotation speed and is in a preset stable state;

[0097] According to the preset excitation points, excitation is applied to the wheel center and the tread respectively to obtain the vibration data of the wheel center and the vibration data of the tread.

[0098] Furthermore, in some embodiments, the wheel to be tested is mounted on the test tray via a flexible connection device.

[0099] Further, in some embodiments, the preset excitation points include three linear directions and three rotational directions of the wheel center and the tread, respectively.

[0100] It should be noted that the above explanation of the embodiment of the NVH performance evaluation method of the wheel is also applicable to the NVH performance evaluation device of the wheel of this embodiment, and will not be repeated here.

[0101] According to the NVH performance evaluation device for a wheel proposed in the embodiment of the present application, the frequency response between the wheel center and the tread can be calculated based on the vibration data of the wheel center and the vibration data of the tread; based on the frequency response between the wheel center and the tread, the displacement transfer function of the wheel to be tested can be calculated, and the NVH performance evaluation result of the wheel to be tested can be obtained according to the displacement transfer function. Therefore, by using the displacement transfer function as the NVH index of the wheel, the problem of inaccurate evaluation of the NVH performance of the wheel caused by using the force transfer rate as the NVH index of the wheel in the prior art is solved, and the reliability of the performance evaluation result is improved.

[0102] Figure 8 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application. The vehicle may include:

[0103] A memory 801 , a processor 802 , and a computer program stored in the memory 801 and executable on the processor 802 .

[0104] When the processor 802 executes the program, the NVH performance evaluation method of the wheel provided in the above embodiment is implemented.

[0105] Furthermore, the vehicle also includes:

[0106] The communication interface 803 is used for communication between the memory 801 and the processor 802 .

[0107] The memory 801 is used to store computer programs that can be executed on the processor 802 .

[0108] The memory 801 may include a high-speed RAM (Random Access Memory) memory, and may also include a non-volatile memory, such as at least one disk memory.

[0109] If the memory 801, the processor 802 and the communication interface 803 are implemented independently, the communication interface 803, the memory 801 and the processor 802 can be connected to each other through a bus and communicate with each other. The bus can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 8 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0110] Optionally, in a specific implementation, if the memory 801, the processor 802 and the communication interface 803 are integrated on a chip, the memory 801, the processor 802 and the communication interface 803 can communicate with each other through an internal interface.

[0111] The processor 802 may be a CPU (Central Processing Unit), or an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of the present application.

[0112] An embodiment of the present application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-mentioned method for evaluating the NVH performance of a wheel.

[0113] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0114] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0115] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for evaluating the NVH performance of a wheel, characterized in that: The following steps are involved: Acquiring vibration data of the wheel center and the tread of the wheel to be tested; Calculating a frequency response between the wheel center and the tread based on the vibration data of the wheel center and the vibration data of the tread; Based on the frequency response between the wheel center and the tread, the displacement transfer function of the wheel to be tested is calculated, and the NVH performance evaluation result of the wheel to be tested is obtained according to the displacement transfer function.

2. The method according to claim 1, characterized in that: The displacement transfer function of the wheel to be tested is: Where ω is the circular frequency, H cc is the frequency response of the wheel center origin, H cp is the frequency response from the tread to the wheel center, H pp is the frequency response of the tread origin, H pc is the frequency response from the wheel center to the tread.

3. The method according to claim 1, characterized in that Before obtaining the vibration data of the wheel center and the vibration data of the tread of the wheel to be tested, the method further includes: Constructing a performance test bench, wherein the performance test bench comprises a test tray for placing the wheel to be tested and a drive motor; Using the driving motor to drive the test tray to rotate, so that the rotation speed of the test tray reaches a preset rotation speed and is in a preset stable state; According to the preset excitation points, excitation is applied to the wheel center and the tread respectively to obtain vibration data of the wheel center and vibration data of the tread.

4. The method according to claim 3, characterized in that: The wheel to be tested is mounted on the test tray via a flexible connection device.

5. The method according to claim 3, characterized in that: The preset excitation points include three linear directions and three rotational directions of the wheel center and the tread respectively.

6. A wheel NVH performance evaluation device, characterized in that: include: An acquisition module, used to acquire the vibration data of the wheel center and the vibration data of the tread of the wheel to be tested; A calculation module, configured to calculate a frequency response between the wheel center and the tread based on the vibration data of the wheel center and the vibration data of the tread; An evaluation module is used to calculate the displacement transfer function of the wheel to be tested based on the frequency response between the wheel center and the tread, and obtain the NVH performance evaluation result of the wheel to be tested according to the displacement transfer function.

7. The device according to claim 6, characterized in that The displacement transfer function of the wheel to be tested is: Where ω is the circular frequency, H cc is the frequency response of the wheel center origin, H cp is the frequency response from the tread to the wheel center, H pp is the frequency response of the tread origin, H pc is the frequency response from the wheel center to the tread.

8. The device according to claim 6, characterized in that Before obtaining the vibration data of the wheel center and the vibration data of the tread of the wheel to be tested, the obtaining module is further used to: Constructing a performance test bench, wherein the performance test bench comprises a test tray for placing the wheel to be tested and a drive motor; Using the driving motor to drive the test tray to rotate, so that the rotation speed of the test tray reaches a preset rotation speed and is in a preset stable state; According to the preset excitation points, excitation is applied to the wheel center and the tread respectively to obtain vibration data of the wheel center and vibration data of the tread.

9. A vehicle, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the NVH performance evaluation method for a wheel as described in any one of claims 1 to 5.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the NVH performance evaluation method of a wheel as described in any one of claims 1 to 5.

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