A method and system for evaluating automobile wind-induced vibration performance

Abstract

The present invention proposes a method and system for evaluating the wind vibration performance of an automobile, which specifically include: a wind tunnel test of the wind vibration performance of the whole vehicle, and a road test of the wind vibration performance of the whole vehicle; scoring the wind vibration sound performance of the whole vehicle based on the objective measurement results and subjective scores of the wind tunnel test and the objective measurement results and subjective scores of the road test; establishing a database and performing analysis, setting 10 levels from L1 to L10 and corresponding scores for each level, to form a wind vibration level table; determining the wind vibration performance level of the tested vehicle model by comparing the wind vibration level table; the present invention is not limited to sound pressure level, and objective measurement results such as loudness and speech clarity and their corresponding recommended values ​​can be added as objective evaluation indicators; it is not limited to collecting objective data from the driver's outer ear, and collection from any point in the vehicle can be added; it is not limited to recording test conditions in the existing wind tunnel and road test condition tables, and can be added or modified, such as changing coasting to uniform acceleration.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobile design and development, and in particular, relates to a method and system for evaluating automobile wind vibration performance. Background Art

[0002] Wind vibration occurs when airflow reaches a certain velocity through an opening. The velocity of the vortex separating from the window opening creates a certain excitation frequency, which resonates with the interior cavity of the vehicle. Depending on the location of occurrence, wind vibration can be categorized as sunroof vibration, front window vibration, and rear window vibration. Sunroof vibration can be addressed with spoilers, while front and rear window vibration is difficult to address due to styling and space constraints. Once it occurs, wind vibration is intense, causing a sensation of pressure and resonance in the ears of the driver and passengers, which is very uncomfortable and is bound to cause customer complaints.

[0003] To shield against road noise, tire noise, powertrain noise, and other factors, wind vibration testing is typically conducted in a wind tunnel. The test results are used to assess the wind vibration performance level. However, this type of testing cannot fully cover operating conditions and does not account for factors such as sudden changes in wind speed and direction, road conditions, and other real-world factors. Furthermore, test data alone may not fully correspond to the user's subjective experience. Therefore, evaluating a vehicle's wind vibration performance cannot rely solely on objective test data. A comprehensive assessment must be based on the actual driving experience and a comprehensive consideration of multiple factors. Finally, based on this comprehensive evaluation, the vehicle's performance level is determined by referring to a performance level correspondence table. Summary of the Invention

[0004] To address these issues, the present invention proposes a method and system for evaluating vehicle wind buffeting performance. This system integrates multiple factors to establish a comprehensive and professional evaluation standard for wind buffeting. This method enhances the systematic and professional nature of wind buffeting evaluation, accurately and objectively reflecting the user's actual subjective experience, truly enabling a comprehensive and accurate assessment of a vehicle's wind buffeting performance.

[0005] The present invention is achieved through the following technical solutions:

[0006] A method for evaluating automobile wind-induced vibration performance, characterized by:

[0007] The method specifically comprises the following steps:

[0008] Step 1: Wind tunnel test of the vehicle's wind vibration performance; conduct objective wind tunnel test and subjective evaluation on the vehicle to obtain objective wind tunnel test results and subjective scores; score the objective wind vibration test results according to the corresponding scoring table;

[0009] Step 2: Road test of the vehicle's wind vibration performance; conduct objective testing and subjective evaluation of the road test on the vehicle to obtain objective measurement results and subjective scores; score the objective measurement results according to the corresponding scoring table for the objective wind vibration measurement results;

[0010] Step 3: Based on the objective and subjective scores of the wind tunnel test obtained in step 1 and the objective and subjective scores of the road test obtained in step 2, the wind-induced acoustic performance of the vehicle is scored;

[0011] Step 4: Establish and analyze the database, set 10 levels from L1 to L10 and the corresponding scores for each level to form a wind vibration level table;

[0012] Step 5: Determine the wind buffeting performance level of the vehicle under test by comparing it to the wind buffeting rating table generated in step 4.

[0013] Furthermore, in step 1,

[0014] Step 1.1: Objective test of wind tunnel performance: The vehicle is stationary in the test section, the engine is not running, and the air conditioner is set to internal circulation mode;

[0015] Step 1.2, setting different wind speed equivalent vehicle driving speed working conditions; adjusting different yaw angles by rotating the balance under the vehicle; the wind speed is 0 to 120 km / h, and the yaw angles are -20°, -10°, 0°, 10°, and 20°;

[0016] Place an artificial head or microphone device in the passenger compartment to collect test data; test the wind vibration data of the sunroof, front window, and rear window under different wind speeds and yaw angles in the actual vehicle state;

[0017] Step 1.3: Processing the objective test data of the wind tunnel test for wind vibration performance: Score the sound pressure level collected by the artificial head or microphone device placed in step 1.2 according to the corresponding scoring table for objective wind vibration measurement results;

[0018] Step 1.4: Subjective evaluation of wind tunnel test of wind vibration performance: Remove the artificial head or microphone device placed in step 1.2, and have the testers perform subjective scoring.

[0019] Furthermore, in step 2,

[0020] Replace the wind tunnel environment in step 1.1 with a road environment. Set the wind speed and direction in the wind tunnel to the speed of 120 to 0 km / h and record the wind speed and direction during the road test.

[0021] Furthermore, in step 3,

[0022] Step 3.1. Calculate the final wind buffeting scores for the sunroof, front window, and rear window: Summarize the scores for each operating condition and take the average value.

[0023] Step 3.2: Analyze the proportion of wind buffeting of the sunroof, front window, and rear window in actual user use:

[0024] The score for evaluating the wind buffeting level of the entire vehicle is 10% for the sunroof, 50% for the front window, and 40% for the rear window. That is, the wind buffeting performance score of the entire vehicle = sunroof wind buffeting * 10% + front window wind buffeting * 50% + rear window wind buffeting * 40%.

[0025] Furthermore, in step 4,

[0026] Based on the calculation results in step 3, the wind buffeting of the entire vehicle is scored, a database is established and analyzed, and 10 levels (L1 to L10) are determined, along with the recommended scores for each level.

[0027] An automobile wind buffeting performance evaluation system:

[0028] The system includes: a wind tunnel test module, a road test module, a database and an evaluation module;

[0029] The wind tunnel test module conducts objective testing and subjective evaluation of the entire vehicle in wind tunnel tests, obtaining objective measurement results and subjective scores. The objective measurement results are scored according to the corresponding scoring table of the wind vibration objective measurement results.

[0030] The road test module conducts objective testing and subjective evaluation of the vehicle on the road, obtaining objective measurement results and subjective scores. The objective measurement results are scored according to the corresponding scoring table of the wind vibration objective measurement results.

[0031] Database, used to set 10 levels from L1 to L10 and the corresponding scores for each level, and to establish a wind vibration level table;

[0032] The evaluation module is used to score the wind buffeting noise performance of the entire vehicle and determine the wind buffeting performance level of the tested vehicle model by comparing it with the established wind buffeting grade table.

[0033] Furthermore,

[0034] The system further comprises a data acquisition module: the data acquisition module is an artificial head or a microphone in the vehicle, and is used to collect wind vibration data during the test process.

[0035] An electronic device includes a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above method when executing the computer program.

[0036] A computer-readable storage medium is used to store computer instructions, which implement the steps of the above method when executed by a processor.

[0037] A vehicle is characterized by 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 steps of the above method.

[0038] Beneficial effects of the present invention

[0039] The present invention is based on subjective evaluation and objective measurement results from wind tunnel and road tests, and integrates various operating conditions and actual vehicle usage habits to establish and analyze a database and classify wind buffeting performance levels to form a vehicle wind buffeting evaluation method.

[0040] The present invention is not limited to sound pressure level, and can add objective measurement results such as loudness and speech clarity and their corresponding recommended values ​​as objective evaluation indicators; it is not limited to collecting objective data from the driver's outer ear, and can add collection from any point in the vehicle; it is not limited to recording test conditions in existing wind tunnel and road test condition tables, and can add or modify them, such as changing gliding to uniform acceleration. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 is a flow chart of the present invention;

[0042] Figure 2 This is the internal communication structure of the present invention, where 401 is a memory, 402 is a processor, and 403 is a communication interface. DETAILED DESCRIPTION

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0044] Combine Figures 1 to 2 The present invention provides a method and system for evaluating automobile wind-induced vibration performance.

[0045] A method for evaluating automobile wind-induced vibration performance: the method specifically comprises the following steps:

[0046] Step 1: Wind tunnel test of the vehicle's wind vibration performance; conduct objective wind tunnel test and subjective evaluation on the vehicle to obtain objective wind tunnel test results and subjective scores; score the objective wind vibration test results according to the corresponding scoring table;

[0047] Step 2: Road test of the vehicle's wind vibration performance; conduct objective testing and subjective evaluation of the road test on the vehicle to obtain objective measurement results and subjective scores; score the objective measurement results according to the corresponding scoring table for the objective wind vibration measurement results;

[0048] Step 3: Based on the objective and subjective scores of the wind tunnel test obtained in step 1 and the objective and subjective scores of the road test obtained in step 2, the wind-induced acoustic performance of the vehicle is scored;

[0049] Step 4: Establish and analyze the database, set 10 levels from L1 to L10 and the corresponding scores for each level to form a wind vibration level table;

[0050] Step 5: Determine the wind buffeting performance level of the vehicle under test by comparing it to the wind buffeting rating table generated in step 4.

[0051] In step 1,

[0052] Step 1.1: Objective test of wind-induced vibration performance in an aeroacoustic wind tunnel test: The vehicle is stationary in the test section with the engine inoperative and the air conditioner set to internal circulation mode.

[0053] Step 1.2: Set up different wind speed equivalent vehicle driving speed conditions; adjust different yaw angles by rotating the balance under the vehicle; place an artificial head or microphone device in the passenger compartment to collect test data; test the wind vibration data of the sunroof, front window, and rear window under different wind speed and yaw angle conditions in the actual vehicle state; the specific wind tunnel test conditions are shown in Table 1 below;

[0054] Step 1.3: Process objective test data from the aeroacoustic wind tunnel test: Score the sound pressure levels collected by the artificial head or microphone device placed in step 1.2;

[0055] The driver's outer ear test data is used as the evaluation point, and the evaluation index is the sound pressure level that represents the magnitude of wind vibration. The measured sound pressure level data is matched with the wind vibration objective measurement results corresponding scoring table in Table 2, and the scores are recorded.

[0056] Step 1.4: Subjective evaluation of the aeroacoustic wind tunnel test: Remove the artificial head or microphone device (acoustic device) placed in step 1.2, and have the testers perform subjective scoring;

[0057] The testers are subjective evaluators with professional NVH backgrounds. They score the wind vibration performance under various working conditions according to the wind vibration subjective evaluation score table 3. The subjective scoring method is 10 points, with a scoring accuracy of 0.25 points. The average score of the evaluators is taken and recorded;

[0058] In step 2,

[0059] Replace the wind tunnel environment in step 1 with a road environment, and replace the wind speed and direction set in the wind tunnel with the wind speed and direction during the vehicle coasting test at a speed of 120 to 0 km / h and record the wind speed and direction during the road test. Carry out the test in weather conditions and on a test site that meet the test requirements. The test equipment and objective data processing are the same as in step 1; the wind vibration data measured in the road test is mixed with powertrain noise, tire noise, road noise and other components, but has no effect on the size of the wind vibration (wind vibration is a low-frequency, high-intensity sound), so it is not subdivided here. Specific road test conditions are shown in Table 4;

[0060] Step 2.1: Objective test of wind vibration performance road test: Conduct the test in weather conditions and on a test site that meet the test requirements, with the air conditioner set to internal circulation mode;

[0061] Step 2.2: Place a microphone inside the passenger compartment to collect test data. Measure wind buffeting data for the sunroof, front windows, and rear windows under a coasting condition of 120 to 0 km / h. See Table 4 below for specific road test conditions.

[0062] Step 2.3: Process objective test data from the wind vibration performance road test: Score the sound pressure level collected by the microphone device placed in step 1.2;

[0063] The driver's outer ear test data is used as the evaluation point, and the evaluation index is the sound pressure level that represents the magnitude of wind vibration. The measured sound pressure level data is matched with the wind vibration objective measurement results corresponding scoring table in Table 2, and the scores are recorded.

[0064] Step 2.4: Subjective evaluation of the wind-induced vibration performance road test: This is conducted under weather conditions and on a test site that meet the test requirements. The microphone equipment (acoustic equipment) placed in Step 2.2 is removed, and a tester performs a subjective evaluation.

[0065] Subjective evaluators are required to have a professional background in NVH and to score the wind vibration performance under various working conditions according to Table 3. The subjective scoring method is 10 points, with a scoring accuracy of 0.25 points. The average score of the evaluators is taken and recorded;

[0066] In step 3,

[0067] Step 3.1. Calculate the final wind buffeting scores for the sunroof, front window, and rear window: Summarize the scores for each operating condition and take the average value, which is the total score divided by the number of scoring times.

[0068] Step 3.2: Analyze the proportion of wind buffeting of the sunroof, front window, and rear window in actual user use:

[0069] The score for evaluating the wind buffeting level of the entire vehicle is 10% for the sunroof, 50% for the front window, and 40% for the rear window. That is, the wind buffeting performance score of the entire vehicle = sunroof wind buffeting * 10% + front window wind buffeting * 50% + rear window wind buffeting * 40%.

[0070] Current vehicles' sunroofs are basically equipped with spoilers in the front or inside, and the sunroof is opened less frequently than the front and rear windows, so the probability of sunroof wind buffeting is lower; the front and rear window wind buffeting spoilers are difficult to configure due to space limitations, and the opening frequency is higher, so the front and rear window wind buffeting is higher.

[0071] In step 4, based on the calculation results from step 3, the vehicle wind buffeting is scored, a database is established, and analysis is performed to determine 10 levels, L1 to L10, and the recommended scores for each level, as shown in Table 5.

[0072] An automobile wind-induced vibration performance evaluation system, characterized by:

[0073] The system includes: a wind tunnel test module, a road test module, a database and an evaluation module;

[0074] The wind tunnel test module conducts objective testing and subjective evaluation of the entire vehicle in wind tunnel tests, obtaining objective measurement results and subjective scores. The objective measurement results are scored according to the corresponding scoring table of the wind vibration objective measurement results.

[0075] The road test module conducts objective testing and subjective evaluation of the vehicle on the road, obtaining objective measurement results and subjective scores. The objective measurement results are scored according to the corresponding scoring table of the wind vibration objective measurement results.

[0076] Database, used to set 10 levels from L1 to L10 and the corresponding scores for each level, and to establish a wind vibration level table;

[0077] The evaluation module is used to score the wind buffeting noise performance of the entire vehicle and determine the wind buffeting performance level of the tested vehicle model by comparing it with the established wind buffeting grade table.

[0078] The system further comprises a data acquisition module: the data acquisition module is an artificial head or a microphone in the vehicle, and is used to collect wind vibration data during the test process.

[0079] Taking a certain L9-class vehicle with a score of 8.9 (one decimal place) as an example, the evaluation method and process of wind buffeting performance are as follows: Figure 1 As shown:

[0080] In the aeroacoustic wind tunnel, tests were conducted according to the wind tunnel test conditions in Table 1 to obtain sound pressure level data, and scores were obtained by comparing the wind vibration objective measurement results with the corresponding scoring table in Table 2;

[0081] Remove the artificial head or microphone data acquisition equipment in the vehicle, conduct subjective evaluation according to the wind tunnel test conditions table in Table 1, and score according to the wind vibration subjective scoring table in Table 3;

[0082] Under weather conditions and test sites that meet the test requirements, conduct the test according to the road test conditions in Table 4, and score the road wind vibration objective measurement results according to the corresponding scoring table in Table 2;

[0083] Remove the artificial head or microphone data acquisition equipment in the vehicle, conduct subjective evaluation according to the road test condition table in Table 4, and score according to the wind vibration subjective scoring table in Table 3;

[0084] Summarize the subjective and objective scores of each working condition, take the average value, and calculate according to the ratio of 10% for the sunroof, 50% for the front window, and 40% for the rear window. The final score of a certain model is 8.9;

[0085] Refer to Table 5 for the wind buffeting rating table to determine that the wind buffeting rating of a certain vehicle model is L9;

[0086]

[0087] Table 1 Wind tunnel test conditions

[0088] Recommended sound pressure level score 140dB or more 1 (135~140)dB 2 (130~135)dB 3 (125~130)dB 4 (120~125)dB 5 (115~120)dB 6 (110~115)dB 7 (105~110)dB 8 (100~105)dB 9 Below 100dB 10

[0089] Table 2 Corresponding score table of objective measurement results of wind vibration

[0090]

[0091] Table 3 Subjective evaluation score table for wind vibration

[0092]

[0093] Table 4 Road test conditions

[0094] Suggested score grade Less than 1 L1 1～2 L2 2～3 L3 3～4 L4 4～5 L5 5～6 L6 6～7 L7 7～8 L8 8～9 L9 9～10 L10

[0095] Table 5 Wind Vibration Level Table

[0096] An electronic device includes a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above method when executing the computer program.

[0097] A computer-readable storage medium is used to store computer instructions, which implement the steps of the above method when executed by a processor.

[0098] A vehicle is characterized by 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 steps of the above method.

[0099] The vehicle also includes:

[0100] The communication interface 403 is used for communication between the memory 401 and the processor 402 .

[0101] The memory 401 is used to store computer programs that can be run on the processor 402 .

[0102] The memory 401 may include a high-speed RAM memory, and may also include a non-volatile memory, such as at least one disk memory.

[0103] If the memory 401, the processor 402, and the communication interface 403 are implemented independently, the communication interface 403, the memory 401, and the processor 402 can be connected to each other via a bus and communicate with each other. The bus can be an Industry Standard Architecture (ISA bus), a Peripheral Component Interconnect (PCI bus), or an Extended Industry Standard Architecture (EISA bus). The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 2 Only one thick line is used in the diagram, but this does not mean that there is only one bus or one type of bus.

[0104] Optionally, in a specific implementation, if the memory 401, the processor 402 and the communication interface 403 are integrated on a chip, the memory 401, the processor 402 and the communication interface 403 can communicate with each other through an internal interface.

[0105] The processor 402 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0106] The above is a detailed introduction to the automobile wind vibration performance evaluation method and system proposed in the present invention, and the principles and implementation methods of the present invention are explained. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for general technical personnel in this field, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A method for evaluating automobile wind-induced vibration performance, characterized by: The method specifically comprises the following steps: Step 1: Wind tunnel test of the vehicle's wind vibration performance; conduct objective wind tunnel test and subjective evaluation on the vehicle to obtain objective wind tunnel test results and subjective scores; score the objective wind vibration test results according to the corresponding scoring table; Step 2: Road test of the vehicle's wind vibration performance; conduct objective testing and subjective evaluation of the road test on the vehicle to obtain objective measurement results and subjective scores; score the objective measurement results according to the corresponding scoring table for the objective wind vibration measurement results; Step 3: Based on the objective and subjective scores of the wind tunnel test obtained in step 1 and the objective and subjective scores of the road test obtained in step 2, the wind-induced acoustic performance of the vehicle is scored; Step 3.

1. Calculate the final wind buffeting scores for the sunroof, front window, and rear window: Summarize the scores for each operating condition and take the average value. Step 3.2: Analyze the proportion of wind buffeting of the sunroof, front window, and rear window in actual user use: The score for evaluating the wind buffeting level of the entire vehicle is 10% for the sunroof, 50% for the front windows, and 40% for the rear windows. That is, the wind buffeting performance score of the entire vehicle = sunroof wind buffeting * 10% + front window wind buffeting * 50% + rear window wind buffeting * 40%; Step 4: Establish and analyze the database, set 10 levels from L1 to L10 and the corresponding scores for each level to form a wind vibration level table; Step 5: Determine the wind buffeting performance level of the vehicle under test by comparing it to the wind buffeting rating table generated in step 4.

2. The method according to claim 1, wherein: In step 1, Step 1.1: Objective test of wind tunnel performance: The vehicle is stationary in the test section, the engine is not running, and the air conditioner is set to internal circulation mode; Step 1.2, setting different wind speed equivalent vehicle driving speed working conditions; adjusting different yaw angles by rotating the balance under the vehicle; the wind speed is 0-120 km / h, and the yaw angles are -20°, -10°, 0°, 10°, and 20°; Place an artificial head or microphone device in the passenger compartment to collect test data; test the wind vibration data of the sunroof, front window, and rear window under different wind speeds and yaw angles in the actual vehicle state; Step 1.3: Process objective test data from the wind tunnel test of wind vibration performance: Score the sound pressure level collected by the artificial head or microphone device placed in step 1.2; Step 1.4: Subjective evaluation of wind tunnel test of wind vibration performance: Remove the artificial head or microphone device placed in step 1.2, and have the testers perform subjective scoring.

3. The method according to claim 2, wherein: In step 2, Replace the wind tunnel environment in step 1 with a road environment, and replace the wind speed and direction set in the wind tunnel with the wind speed and direction during the vehicle coasting test from 120 to 0 km / h and the road test.

4. The method according to claim 3, wherein: In step 4, Based on the calculation results in step 3, the wind buffeting of the entire vehicle is scored, a database is established and analyzed, and 10 levels (L1 to L10) are determined, along with the recommended scores for each level.

5. An evaluation system for executing the automobile wind buffeting performance evaluation method according to any one of claims 1 to 4, characterized in that: The system includes: a wind tunnel test module, a road test module, a database and an evaluation module; The wind tunnel test module conducts objective testing and subjective evaluation of the entire vehicle in wind tunnel tests, obtaining objective measurement results and subjective scores. The objective measurement results are scored according to the corresponding scoring table of the wind vibration objective measurement results. The road test module conducts objective testing and subjective evaluation of the vehicle on the road, obtaining objective measurement results and subjective scores. The objective measurement results are scored according to the corresponding scoring table of the wind vibration objective measurement results. Database, used to set 10 levels from L1 to L10 and the corresponding scores for each level, and to establish a wind vibration level table; The evaluation module is used to score the wind buffeting noise performance of the entire vehicle and determine the wind buffeting performance level of the tested vehicle model by comparing it with the established wind buffeting grade table.

6. The system according to claim 5, characterized in that: The system further comprises a data acquisition module: the data acquisition module is an artificial head or a microphone in the vehicle, and is used to collect wind vibration data during the test process.

7. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 4 are implemented.

8. A computer-readable storage medium for storing computer instructions, characterized in that: When the computer instructions are executed by a processor, the steps of the method according to any one of claims 1 to 4 are implemented.

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 steps of the method according to any one of claims 1 to 4.

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