Vehicle noise test method, test system and storage medium

Abstract

The invention discloses a vehicle noise test method and test system and a storage medium, and the method comprises the steps: carrying out the real vehicle road sliding noise test of shielding the engine sound of a vehicle, obtaining the driving road noise data and the driving wind noise data at different vehicle speeds, carrying out the engine universal characteristic working condition noise test of the vehicle, and obtaining the driving wind noise data at different vehicle speeds; engine noise data under different engine working conditions are obtained, and then the engine noise data, the driving wind noise data and the driving road noise data are synthesized into a full-working-condition in-vehicle noise data set; according to the method, noise data of different noise sources can be quickly obtained, sound source separation is realized, a full-working-condition in-vehicle noise data set suitable for noise playback can be effectively synthesized, in-vehicle noise performance evaluation test under any working condition can be carried out subsequently, noise source diagnosis of full-working-condition sound source separation is realized, and the method is suitable for popularization and application. The problem that the vehicle noise performance evaluation test has limitation is solved, and the accuracy of the vehicle noise performance evaluation test is improved.

Description

Technical Field

[0001] The present invention relates to the field of vehicle performance technology, and in particular to a vehicle noise testing method, a testing system and a storage medium. Background Art

[0002] As people's pursuit of quality of life continues to improve, the requirements for vehicle comfort are also constantly increasing. Interior noise is an important factor affecting vehicle comfort. Therefore, interior noise testing of vehicles has become an important part of the vehicle development process.

[0003] Existing in-vehicle noise tests are usually in-vehicle noise tests under a single or several typical working conditions, such as uniform-speed in-vehicle noise tests and fixed-position noise tests. There are relatively few test conditions and it is impossible to obtain in-vehicle noise data under any working condition. It is difficult to subsequently achieve in-vehicle noise playback under all working conditions, and the test noise data obtained is general in-vehicle noise data. It is impossible to achieve noise playback with sound source separation, and it is difficult to effectively interrupt related sound sources, which leads to limitations in subsequent vehicle noise performance evaluation tests based on noise playback. Summary of the invention

[0004] The present invention provides a vehicle noise testing method, a testing system and a storage medium to solve the problem that in the existing vehicle noise testing, it is impossible to obtain in-vehicle noise data of any working condition and with separated sound sources, resulting in limitations in the vehicle noise performance evaluation test.

[0005] In view of the above problems, a vehicle noise testing method is provided, comprising:

[0006] By performing a real vehicle road sliding noise test with the engine sound shielded, the driving road noise data and driving wind noise data at different vehicle speeds were obtained;

[0007] By testing the vehicle's engine universal characteristic operating noise, the engine noise data under different engine operating conditions can be obtained;

[0008] The engine noise data, driving wind noise data and driving road noise data are combined into a full-condition vehicle interior noise dataset.

[0009] A vehicle noise testing system is provided, comprising a vehicle for performing noise testing, and further comprising:

[0010] The first test system is used to perform a real vehicle road sliding noise test on the vehicle with the engine sound shielded, and obtain the driving road noise data and driving wind noise data at different vehicle speeds;

[0011] The second test system is used to perform engine universal characteristic working condition noise test on the vehicle to obtain engine noise data under different engine working conditions;

[0012] The vehicle noise determination device is used to synthesize the engine noise data, the driving wind noise data and the driving road noise data into a full-operating-condition vehicle interior noise data set.

[0013] A readable storage medium is provided, which stores a computer program. When the computer program is executed by a processor, the steps of the vehicle noise testing method or the functions of the vehicle noise testing system are implemented.

[0014] In one solution provided by the above-mentioned vehicle noise test method, test system and storage medium, a real vehicle road coasting noise test with engine sound shielded is performed on the vehicle to obtain driving road noise data and driving wind noise data at different vehicle speeds, and an engine universal characteristic working condition noise test is performed on the vehicle to obtain engine noise data under different engine working conditions, and then the engine noise data, driving wind noise data and driving road noise data are synthesized into a full-working condition in-vehicle noise data set suitable for vehicle full-working condition noise performance evaluation test; in the embodiment of the present invention, through the engine universal characteristic working condition noise test and the real vehicle road coasting noise test, noise data of different noise sources can be quickly obtained, which not only realizes sound source separation, but also can effectively synthesize a full-working condition in-vehicle noise data set suitable for noise playback, so as to perform subsequent in-vehicle noise performance evaluation test under any working condition, and realize noise source diagnosis with full-working condition sound source separation, solve the problem of limitations in vehicle noise performance evaluation test, and improve the accuracy of vehicle noise performance evaluation test. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0016] Figure 1 is a structural schematic diagram of a vehicle noise testing system in one embodiment of the present invention;

[0017] Figure 2 is a flow chart of a vehicle noise testing method according to an embodiment of the present invention;

[0018] Figure 3 is another flow chart of a vehicle noise testing method according to an embodiment of the present invention;

[0019] Figure 4 is a schematic diagram of noise playback results of a vehicle under a certain vehicle operating condition in one embodiment of the present invention;

[0020] Figure 5 yes Figure 2A schematic diagram of an implementation process of step S10;

[0021] Figure 6 1 is a schematic diagram of the installation of a digital binaural artificial head according to an embodiment of the present invention;

[0022] Figure 7 is a schematic diagram of the installation of a microphone and an acceleration sensor in one embodiment of the present invention;

[0023] Figure 8 is a schematic diagram of data input and output of a multi-phase interference model in one embodiment of the present invention;

[0024] Fig. 9 yes Figure 2 A schematic diagram of an implementation process of step S20;

[0025] Fig.10 is a curve diagram of the change of the sound pressure level of the vehicle interior noise at different accelerator pedal openings at various preset engine speeds in one embodiment of the present invention;

[0026] Fig.11 Schematic diagram of the selection of the accelerator pedal opening operating point in one embodiment of the present invention; Preset speed change curve

[0027] Fig.12 is a preset speed change curve diagram in one embodiment of the present invention;

[0028] Fig.13 is another structural schematic diagram of a vehicle noise testing system according to an embodiment of the present invention;

[0029] Fig.14 It is a structural schematic diagram of a noise synthesis device in one embodiment of the present invention. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The vehicle noise testing method provided by the embodiment of the present invention can be applied in Figure 1 In the vehicle noise test system shown, the vehicle noise test system comprises a vehicle for performing noise test, a first test system, a second test system and a noise synthesis device, wherein the noise synthesis device communicates with the first test system and the second test system through a network.

[0032] Specifically, the first test system is used to perform a real vehicle road sliding noise test on the vehicle with the engine sound shielded, and obtain the driving road noise data and driving wind noise data at different vehicle speeds. The second test system is used to perform an engine universal characteristic working condition noise test on the vehicle, and obtain the engine noise data under different engine working conditions. The noise synthesis device is used to synthesize the engine noise data, driving wind noise data and driving road noise data into a full-condition in-vehicle noise data set.

[0033] In this embodiment, the first test system is used to perform a real vehicle road sliding noise test with the engine sound shielded on the vehicle to obtain the driving road noise data and driving wind noise data at different vehicle speeds, and the second test system is used to perform an engine universal characteristic working condition noise test on the vehicle to obtain the engine noise data under different engine working conditions, and then the engine noise data, the driving wind noise data and the driving road noise data are synthesized into a full-condition in-vehicle noise data set suitable for the vehicle full-condition noise performance evaluation test, thereby achieving real-time noise source separation, so as to facilitate the subsequent real-time subjective evaluation of the sound playback test and the noise source performance diagnosis. Through the engine universal characteristic working condition noise test and the real vehicle road sliding noise test, the noise data of different noise sources can be quickly obtained, which not only realizes the sound source separation, but also can effectively synthesize the full-condition in-vehicle noise data set suitable for noise playback, so as to facilitate the subsequent in-vehicle noise performance evaluation test of any working condition, and realize the noise source diagnosis of the full-condition sound source separation, which solves the problem of limitations in the vehicle noise performance evaluation test, improves the accuracy of the vehicle noise performance evaluation test, thereby greatly improving the development efficiency and providing guidance for the development and design of the vehicle interior sound quality.

[0034] In this embodiment, the vehicle noise test system includes a vehicle, a first test system, a second test system and a noise synthesis device, which is only for exemplary description. In other embodiments, the vehicle noise test system also includes other devices, such as a sound playback test system, which is used to: when the vehicle needs to be tested for noise performance evaluation or noise source diagnosis, the noise is played back based on the full-operating-condition in-vehicle noise data set to obtain the vehicle's noise performance evaluation data or noise source diagnosis data. It can achieve in-vehicle noise playback of all working conditions of the vehicle through sound playback, obtain accurate subjective evaluation data of in-vehicle noise, and can perform real-time noise source separation of all working conditions, as well as separate real-time playback of different noise source parts, to achieve rapid diagnosis of vehicle noise source performance under any working condition, which can replace real-vehicle evaluation and diagnosis, reduce the manpower, material and time costs of subjective evaluation of in-vehicle sound quality, improve development efficiency, and provide guidance for the development and design of vehicle in-vehicle sound quality.

[0035] In addition, after obtaining the full-condition in-vehicle noise dataset, the noise data of the full-condition in-vehicle noise dataset can be used as the input of the driving simulator to achieve online subjective evaluation of the in-vehicle sound quality under all working conditions, and provide experimental basis and guidance for the virtual design of the sound quality development of active in-vehicle sounds (electronic sounds, pedestrian warning sounds, interactive sound effects, etc.) and optimize the design direction.

[0036] In one embodiment, if Figure 2 As shown, a vehicle noise testing method is provided, and the method is applied in Figure 1 The vehicle noise test system in the example is used as an example to illustrate, including the following steps:

[0037] S10: A real vehicle road sliding noise test is performed on the vehicle with the engine sound shielded, so as to obtain driving road noise data and driving wind noise data at different vehicle speeds.

[0038] When it is necessary to obtain in-vehicle noise data suitable for sound reproduction, a real vehicle road sliding noise test with engine sound shielded is performed on the vehicle through the first test system to obtain road noise at different vehicle speeds and wind noise at different vehicle speeds, and then the road noise at different vehicle speeds is recorded as driving road noise data, and the wind noise at different vehicle speeds is recorded as driving wind noise data. That is, the driving road noise data includes road noise at different vehicle speeds, and the driving wind noise data includes wind noise at different vehicle speeds.

[0039] In this embodiment, the actual vehicle road sliding noise test is conducted on the vehicle. During the test, the vehicle is first controlled to accelerate until it reaches a certain higher speed (such as 120km / h), and then the vehicle is controlled to coast in neutral until the speed is reduced to 0 and the vehicle stops. During this process, noise collection is required to collect the tire noise changes (road noise) and wind noise changes when the vehicle speed is reduced from the higher speed to 0, so as to obtain the road noise and wind noise at different speeds, that is, the driving road noise data and the driving wind noise data. In addition, when conducting the actual vehicle road sliding noise test, the engine sound of the vehicle is shielded, which can reduce the impact of the engine sound on the noise inside the vehicle, improve the accuracy of the collected data, and thus improve the driving road noise data and the driving wind noise data.

[0040] S20: By performing a universal characteristic engine noise test on the vehicle, engine noise data under different engine operating conditions are obtained.

[0041] When it is necessary to obtain in-vehicle noise data suitable for sound playback, it is also necessary to perform an engine universal characteristic operating condition noise test on the vehicle through a second test system to obtain the engine noise under different engine operating conditions and obtain the engine noise data, that is, the engine noise data includes the engine noise under different engine operating conditions.

[0042] In this embodiment, when testing the road sliding noise of a vehicle, multiple engine speeds can be selected (can be exhaustive or multiple representative engine speeds can be selected), and then the vehicle is fixed on the rotary hub dynamometer, the vehicle gear is fixed, and then the wheels of the vehicle are driven to rotate through the rotary hub to drive the vehicle wheels to run at a specific engine speed, and the throttle pedal (accelerator pedal) of the vehicle is controlled to gradually increase from fully closed 0% to fully open 100%, so as to collect the engine noise in the process, obtain the engine noise of different throttle pedal openings (increased from 0% to 100%) at the specific engine speed, traverse all engine speeds, and finally obtain the engine noise signals of different throttle pedal openings at each engine speed as the engine noise data under different engine working conditions, that is, the universal characteristic working condition engine noise data. Among them, the rotary hub dynamometer is a silent rotary hub dynamometer, which reduces the influence of the running sound of the rotary hub dynamometer on the collected noise data and improves the accuracy of the engine noise data.

[0043] S30: Synthesize the engine noise data, the driving wind noise data, and the driving road noise data into a full-operating-condition vehicle interior noise data set.

[0044] After testing and obtaining the engine noise under different engine working conditions, wind noise and road noise under different vehicle speeds, that is, testing and obtaining the engine noise data, driving wind noise data and driving road noise data, it is necessary to synthesize the engine noise data, driving wind noise data and driving road noise data into a full-working-condition in-vehicle noise dataset. For example, the engine noise data, driving wind noise data and driving road noise data can be directly saved as the engine noise dataset, driving wind noise dataset and driving road noise dataset respectively, and then summarized into a full-working-condition in-vehicle noise dataset, which is simple and intuitive and convenient for subsequent calls.

[0045] The engine noise data, driving wind noise data and driving road noise data can also be plotted as an engine noise curve, a driving wind noise data curve and a driving road noise data curve respectively, so that the engine noise curve, the driving wind noise data curve and the driving road noise data curve can be saved as a full-condition in-vehicle noise data set. Various types of noise data are described in a curve manner, and the noise change description is intuitive and easy to analyze.

[0046] In this embodiment, by performing a real vehicle road sliding noise test with the engine sound shielded on the vehicle, the driving road noise data and driving wind noise data at different vehicle speeds are obtained, and the engine universal characteristic working condition noise test is performed on the vehicle to obtain the engine noise data under different engine working conditions, and then the engine noise data, the driving wind noise data and the driving road noise data are synthesized into a full-condition in-vehicle noise data set suitable for the vehicle full-condition noise performance evaluation test, thereby achieving real-time noise source separation, so as to facilitate the subsequent real-time subjective evaluation of the sound playback test and the noise source performance diagnosis. Through the engine universal characteristic working condition noise test and the real vehicle road sliding noise test, the noise data of different noise sources can be quickly obtained, which not only realizes the sound source separation, but also can effectively synthesize the full-condition in-vehicle noise data set suitable for noise playback, so as to facilitate the subsequent in-vehicle noise performance evaluation test of any working condition, and realize the noise source diagnosis of the full-condition sound source separation, which solves the problem of limitations in the vehicle noise performance evaluation test, improves the accuracy of the vehicle noise performance evaluation test, thereby greatly improving the development efficiency and providing guidance for the development and design of the vehicle interior sound quality.

[0047] In one embodiment, if Figure 3 As shown, after step S30, the engine noise data, the driving wind noise data and the driving road noise data are synthesized into a full-operating-condition vehicle interior noise data set, and the method further specifically includes the following steps:

[0048] S40: When it is necessary to perform a noise performance evaluation test on the vehicle, noise is replayed based on the full-operating-condition vehicle interior noise data set to obtain noise performance evaluation data of the vehicle.

[0049] In this embodiment, the vehicle noise testing system also includes a sound playback test system, which is used to perform noise performance evaluation tests on the vehicle under any or all operating conditions based on a full-operating-condition in-vehicle noise data set, or to perform noise source diagnosis under any or all operating conditions based on engine noise data, driving wind noise data, or driving road noise data, so as to locate the vehicle noise source related performance.

[0050] After being synthesized into a full-operating-condition interior noise data set, when a noise performance evaluation test of a vehicle is required, noise data of any operating condition or all operating conditions are replayed based on the full-operating-condition interior noise data set to obtain the noise performance evaluation data of the vehicle.

[0051] S50: When it is necessary to diagnose the noise source of the vehicle, the noise data corresponding to the noise source to be diagnosed in the full-operation-condition vehicle interior noise data set is called to perform noise replay to obtain the noise source diagnosis data of the vehicle.

[0052] When it is necessary to diagnose the noise source of the vehicle, the noise data corresponding to the noise source to be diagnosed in the full-operation vehicle interior noise data set is called for noise replay to obtain the noise source diagnosis data of the vehicle. For example, if the noise sources to be diagnosed include the engine, wheels (the friction vibration between the wheels and tires and the ground generates road noise), and the body (the body surface contacts the airflow during driving to generate wind noise), then the relevant noise data in the engine noise data, driving road noise data, and driving wind noise data are called for replay to achieve fault diagnosis with noise source separation, thereby identifying the noise source that causes performance problems.

[0053] Specifically, when the noise source to be diagnosed is the engine, that is, when the engine noise performance of the vehicle needs to be diagnosed, the engine noise data in the full-operating-condition vehicle interior noise data set is called to replay the noise under any operating condition or all operating conditions to obtain the engine noise diagnosis data, thereby determining the noise performance or fault problem of the engine; when the noise source to be diagnosed is the wheel, that is, when the wheel noise performance of the vehicle needs to be diagnosed, the driving road noise data in the full-operating-condition vehicle interior noise data set is called to replay the noise under any operating condition or all operating conditions to obtain the wheel noise diagnosis data, thereby determining the noise performance or fault problem of the wheel; when the noise source to be diagnosed is the vehicle body, that is, when the vehicle body noise performance needs to be diagnosed, the driving wind noise data in the full-operating-condition vehicle interior noise data set is called to replay the noise under any operating condition or all operating conditions to obtain the vehicle body noise diagnosis data, thereby determining the noise performance or fault problem of the vehicle body.

[0054] In this embodiment, after the engine noise data, driving wind noise data and driving road noise data are synthesized into a full-operating-condition in-vehicle noise data set, when the noise performance evaluation test of the vehicle needs to be performed, the noise is replayed based on the full-operating-condition in-vehicle noise data set to obtain the vehicle's noise performance evaluation data; when the noise source of the vehicle needs to be diagnosed, the noise data corresponding to the noise source to be diagnosed in the full-operating-condition in-vehicle noise data set is called for noise replay to obtain the vehicle's noise source diagnosis data. According to actual needs, the noise data of different evaluation conditions are replayed to achieve in-vehicle noise playback of all working conditions of the vehicle, obtain accurate subjective evaluation data of in-vehicle noise, and can perform real-time noise source separation of all working conditions, as well as separate real-time playback of different noise source parts, to achieve rapid diagnosis of vehicle noise source performance under any working condition, improve development efficiency, and provide guidance for the development and design of vehicle in-vehicle sound quality.

[0055] In one embodiment, in step S40, when a noise performance evaluation test is required for a vehicle, noise replay is performed based on a full-operation vehicle interior noise data set to obtain noise performance evaluation data of the vehicle, which specifically includes the following steps:

[0056] S41: when it is necessary to perform an in-vehicle noise performance evaluation test on a vehicle, determining whether the full-operating-condition in-vehicle noise data set includes full-operating-condition mixed noise data, where the full-operating-condition mixed noise data is synthesized based on engine noise data, driving wind noise data, and driving road noise data, and is applicable to mixed noise data of different vehicle operating conditions;

[0057] S42: If the mixed noise data of all working conditions is included, then in the mixed noise data of all working conditions, the mixed noise data corresponding to the working condition to be evaluated is determined as the target playback noise data;

[0058] S43: Play the target playback noise data to evaluate the vehicle interior noise performance, and obtain the vehicle noise performance evaluation data.

[0059] In this embodiment, when it is necessary to conduct an in-vehicle noise performance evaluation test on a vehicle, it is necessary to first determine whether the operating condition to be evaluated can be any vehicle operating condition, or all vehicle operating conditions, and determine whether the in-vehicle noise data set for all operating conditions includes mixed noise data for all operating conditions. Among them, the mixed noise data for all operating conditions is a mixed noise data suitable for different vehicle operating conditions, which is synthesized based on engine noise data, driving wind noise data, and driving road noise data. If the in-vehicle noise data set for all operating conditions includes mixed noise data for all operating conditions, then the mixed noise data corresponding to the operating condition to be evaluated is directly determined in the mixed noise data for all operating conditions as the target playback noise data, and then the target playback noise data is played so that the user or the intelligent evaluation tool can evaluate the in-vehicle noise performance of the vehicle and obtain the noise performance evaluation data of the vehicle. It is simple to directly search for the corresponding noise data in the in-vehicle noise data set for all operating conditions, and then through the noise playback method, the overall in-vehicle noise evaluation of any operating condition can be quickly and effectively performed, so as to achieve accurate subjective evaluation of the in-vehicle noise quality.

[0060] In one embodiment, in step S40, when a noise performance evaluation test is required for a vehicle, noise replay is performed based on a full-operation vehicle interior noise data set to obtain noise performance evaluation data of the vehicle, which specifically includes the following steps:

[0061] S44: When the full-operating-condition vehicle interior noise data set does not include full-operating-condition mixed noise data, a target vehicle speed, a target engine speed, and a target accelerator pedal opening corresponding to the operating condition to be evaluated are determined.

[0062] After determining whether the full-operating-condition interior noise data set includes the full-operating-condition mixed noise data, when the full-operating-condition interior noise data set does not include the full-operating-condition mixed noise data, it means that the full-operating-condition interior noise data set only includes the engine noise data, the driving wind noise data, and the driving road noise data. Among them, the engine noise data includes the engine noise under different engine speeds and different accelerator pedal openings, that is, the engine operating condition can be determined by the engine speed and the accelerator pedal opening (the engine torque changes accordingly when the accelerator pedal opening changes). At this time, it is necessary to determine the target vehicle speed, target engine speed, and target accelerator pedal opening corresponding to the operating condition to be evaluated, so as to subsequently determine the corresponding engine noise, wind noise, and road noise.

[0063] S45: Determine the target engine noise corresponding to the target engine speed and the target accelerator pedal opening in the engine noise data, determine the target wind noise corresponding to the target vehicle speed in the driving wind noise data, and determine the target road noise corresponding to the target vehicle speed in the driving road noise data.

[0064] After determining the target vehicle speed, target engine speed, and target accelerator pedal opening corresponding to the operating condition to be evaluated, the target engine noise corresponding to the target engine speed and the target accelerator pedal opening is determined in the engine noise data, the target wind noise corresponding to the target vehicle speed is determined in the driving wind noise data, and the target road noise corresponding to the target vehicle speed is determined in the driving road noise data.

[0065] Since the influencing factors of the engine operating condition are the engine speed and the engine torque, in other embodiments, the engine operating condition can be determined by the engine speed and the accelerator pedal opening. Correspondingly, the engine noise data includes the engine noise at different engine speeds and different accelerator pedal openings. Then, the target vehicle speed, target engine speed and target accelerator pedal opening corresponding to the operating condition to be evaluated are determined. In the engine noise data, the target engine noise corresponding to the target engine speed and the target engine torque opening is determined. In the driving wind noise data, the target wind noise corresponding to the target vehicle speed is determined. In the driving road noise data, the target road noise corresponding to the target vehicle speed is determined.

[0066] In this embodiment, the engine noise at different engine speeds and different accelerator pedal openings is obtained through testing as engine noise data, which more intuitively reflects the impact of the driver's operating behavior on the noise and is easier to collect than the engine torque.

[0067] S46: synthesizing the target engine noise, the target wind noise and the target road noise into mixed noise data of the vehicle operating condition to be evaluated as target playback noise data.

[0068] S47: Play the target playback noise data to evaluate the vehicle interior noise performance, and obtain the vehicle noise performance evaluation data.

[0069] Then, the target engine noise, target wind noise and target road noise are synthesized into mixed noise data of the vehicle operating condition to be evaluated as target playback noise data, and the target playback noise data is played to evaluate the vehicle's interior noise performance to obtain the vehicle's noise performance evaluation data.

[0070] In this embodiment, when the full-operating-condition interior noise data set does not include the full-operating-condition mixed noise data, the target vehicle speed, target engine speed and target accelerator pedal opening corresponding to the operating condition to be evaluated are determined; in the engine noise data, the target engine noise corresponding to the target engine speed and the target accelerator pedal opening is determined, the target wind noise corresponding to the target vehicle speed is determined in the driving wind noise data, and the target road noise corresponding to the target vehicle speed is determined in the driving road noise data; the target engine noise, target wind noise and target road noise are synthesized into mixed noise data of the vehicle operating condition to be evaluated as target playback noise data; the target playback noise data is played to evaluate the interior noise performance of the vehicle, and the noise performance evaluation data of the vehicle is obtained; by means of noise playback, the overall interior noise evaluation of any operating condition is performed quickly and effectively, and accurate subjective evaluation of the interior noise quality is achieved.

[0071] In one embodiment, in step S30, the engine noise data, the driving wind noise data and the driving road noise data are combined into a full-operating-condition vehicle interior noise data set, which specifically includes the following steps:

[0072] S31: Determine a vehicle speed and an engine operating condition corresponding to a certain vehicle operating condition;

[0073] S32: determining the engine noise corresponding to the engine operating condition in the engine noise data, determining the wind noise corresponding to the vehicle speed in the driving wind noise data, and determining the road noise corresponding to the vehicle speed in the driving road noise data;

[0074] S33: synthesizing the corresponding engine noise, the corresponding wind noise and the corresponding road noise into mixed noise data of the vehicle working condition, traversing all vehicle working conditions to obtain mixed noise data of all vehicle working conditions, and recording them as mixed noise data of all working conditions;

[0075] S34: Combining the full-operating-condition mixed noise data, the engine noise data, the driving wind noise data, and the driving road noise data into a full-operating-condition in-vehicle noise data set.

[0076] Among them, the engine noise data includes engine noise under different engine operating conditions, the driving wind noise data includes wind noise at different vehicle speeds, and the driving road noise data includes road noise at different vehicle speeds.

[0077] In this embodiment, after obtaining the engine noise data, the driving wind noise data and the driving road noise data, it is necessary to determine the vehicle speed and the engine working condition corresponding to a certain vehicle working condition; then, in the engine noise data, determine the engine noise corresponding to the engine working condition, in the driving wind noise data, determine the wind noise corresponding to the vehicle speed, and in the driving road noise data, determine the road noise corresponding to the vehicle speed; synthesize the corresponding engine noise, the corresponding wind noise and the corresponding road noise into the mixed noise data of the vehicle working condition, and traverse all vehicle working conditions to obtain the mixed noise data of all vehicle working conditions, and record it as the mixed noise data of all working conditions; the mixed noise data of all working conditions, the engine noise data, the driving wind noise data and the driving road noise data are combined into the full-working condition in-vehicle noise data set. When synthesizing the full-working condition in-vehicle noise data set, the mixed noise under different vehicle working conditions is directly synthesized based on the engine noise data, the driving wind noise data and the driving road noise data to obtain the mixed noise data of all working conditions, which increases the diversity of the mixed noise data of all working conditions and is more suitable for the vehicle noise performance evaluation of noise playback, so as to perform the sound playback under any working condition in the future and reduce the synthesis steps.

[0078] In one embodiment, the engine noise data includes the engine noise of the vehicle at different engine speeds and different accelerator pedal openings. In step S32, i.e., in the engine noise data, determining the engine noise corresponding to the engine operating condition specifically includes the following steps:

[0079] S321: Determine the engine speed and accelerator pedal opening corresponding to the engine operating condition;

[0080] S322: In the engine noise data, determine the engine noise pointed to by the corresponding engine speed and accelerator pedal opening, and obtain the engine noise corresponding to the engine operating condition.

[0081] In this embodiment, the engine noise data includes engine noise at different engine speeds and different accelerator pedal openings, and the engine operating condition can be determined by the engine speed and the accelerator pedal opening (the engine torque changes accordingly when the accelerator pedal opening changes).

[0082] After determining the vehicle speed and engine operating conditions corresponding to the vehicle operating conditions, it is necessary to determine the engine speed and accelerator pedal opening corresponding to the engine operating conditions, and then determine the engine noise pointed to by the corresponding engine speed and accelerator pedal opening in the engine noise data, and obtain the engine noise corresponding to the engine operating conditions for noise playback, which is simple and easy to operate. Figure 4 As shown, it is a schematic diagram of the noise playback result of a vehicle under a certain vehicle operating condition. Under this vehicle operating condition, the noise playback result of the engine noise data at different engine speeds and different throttle pedal openings (throttle openings) is shown as the curve in the figure.

[0083] In other embodiments, the engine noise data includes engine noise at different engine speeds and different engine torques. After determining the vehicle speed and engine operating condition corresponding to the vehicle operating condition, it is necessary to determine the engine speed and engine torque corresponding to the engine operating condition. Then, in the engine noise data, determine the engine noise pointed to by the corresponding engine speed and engine torque to obtain the engine noise corresponding to the engine operating condition.

[0084] In this embodiment, the engine noise corresponding to the engine operating condition is obtained by determining the engine speed and the accelerator pedal opening corresponding to the engine operating condition, and then determining the engine noise pointed to by the corresponding engine speed and the accelerator pedal opening in the engine noise data. The specific steps of determining the engine noise corresponding to the engine operating condition in the engine noise data are clarified, the engine operating condition is determined directly based on the engine speed and the accelerator pedal opening, and then the engine noise corresponding to the engine speed and the accelerator pedal opening is searched in the engine noise data. This is simple and easy to operate.

[0085] In one embodiment, if Figure 5 As shown, in step S10, a real vehicle road sliding noise test is performed on the vehicle with the engine sound shielded to obtain driving road noise data and driving wind noise data at different vehicle speeds, which specifically includes the following steps:

[0086] S11: Performing a real vehicle road coasting test on the vehicle with the engine sound shielded, and collecting in-vehicle noise data and tire near-field noise data at different vehicle speeds.

[0087] In this embodiment, the first test system includes a first analysis device, a first collection device connected to the first analysis device, and a first control device connected to the vehicle. Among them, the first collection device includes an in-vehicle noise collection device and a tire near-field noise collection device. The first control device controls the vehicle to perform a real vehicle road coasting test that shields the engine sound, that is, controls the vehicle to accelerate until it reaches a certain higher speed (such as 120km / h), and then controls the vehicle to coast in neutral until the speed drops to 0 and the vehicle stops. In this process, the in-vehicle noise at different speeds is collected by the in-vehicle noise collection device to obtain in-vehicle noise data, and the tire near-field noise at different speeds is collected by the tire near-field noise collection device to obtain tire near-field noise data.

[0088] The in-vehicle noise collection device is installed on the seat in the vehicle. In order to further ensure that the collected in-vehicle noise data is closer to the noise heard by the user in the cockpit, the in-vehicle noise collection device can be a digital binaural artificial head, which is installed on the driver's seat or the co-pilot seat through a bracket, such as Figure 6As shown, the ear position of the digital binaural artificial head is about 0.7m away from the seat cushion, ensuring that it can collect noise that is closer to what the human ear hears. The tire near-field noise collection device is installed in the front and rear near-field positions of the wheel tire tread. To ensure the authenticity of the collected tire near-field noise, two tire near-field noise collection devices can be installed in the front and rear near-fields of each wheel tire, respectively, so as to aggregate the collected multiple near-field noise data into tire near-field noise data. For example, Figure 7 As shown, Figure 7 The left and right directions are respectively the front and rear directions of the tire, and the tire near-field noise collection device can be a microphone ( Figure 7 The microphone is installed at a position 0.1m in front of and behind the tread of the wheel tire, and the microphone is also 0.1m from the ground to ensure that more accurate tire near-field noise is collected, that is, the noise generated by the contact between the tire and the ground.

[0089] In one embodiment, the first acquisition device also includes an acceleration acquisition device. When the first control device controls the vehicle to perform a real-vehicle road coasting test with the engine sound shielded, the acceleration of the vehicle wheels is acquired in real time through the acceleration acquisition device to obtain tire vibration acceleration data at different vehicle speeds, so as to perform noise calculations on the tire vibration acceleration data, the in-vehicle noise data, and the tire near-field noise data based on the multi-coherent filtering analysis theory, and obtain more accurate driving road noise data and driving wind noise data. In order to ensure the accuracy of the tire vibration acceleration data, it is necessary to equip each wheel with an acceleration acquisition device to aggregate the multiple vibration acceleration data collected into tire vibration acceleration data. For example, the acceleration acquisition device may be an acceleration sensor, which is installed at the center of each wheel, such as Figure 7 As shown in the figure, acceleration refers to the acceleration sensor.

[0090] S12: performing road noise separation analysis based on the in-vehicle noise data and the tire near-field noise data at different vehicle speeds to obtain driving road noise data including road noise at different vehicle speeds and driving wind noise data including wind noise at different vehicle speeds.

[0091] After collecting the in-vehicle noise data at different vehicle speeds and the tire near-field noise data at different vehicle speeds, road noise separation and analysis are performed based on the in-vehicle noise data and the tire near-field noise data at different vehicle speeds to obtain driving road noise data including road noise at different vehicle speeds and driving wind noise data including wind noise at different vehicle speeds. For example, during the vehicle's neutral gliding process, since the engine sound is shielded, the in-vehicle noise is usually a structure generated by the superposition of road noise and wind noise. At this time, the tire near-field noise data at different vehicle speeds can be directly used as the driving road noise data at different vehicle speeds, and the driving road noise data includes the in-vehicle noise at different vehicle speeds; then, the driving road noise data is separated from the in-vehicle noise data to obtain the driving wind noise data, that is, the wind noise at different vehicle speeds is separated, which is simple and convenient.

[0092] In this embodiment, a real vehicle road coasting test with engine sound shielded is performed on the vehicle, and interior noise data and tire near-field noise data at different vehicle speeds are collected. Then, road noise separation analysis is performed based on the interior noise data and tire near-field noise data at different vehicle speeds to obtain driving road noise data including road noise at different vehicle speeds and driving wind noise data including wind noise at different vehicle speeds. The steps of performing a real vehicle road coasting test with engine sound shielded on the vehicle to obtain driving road noise data and driving wind noise data at different vehicle speeds are refined, thereby providing a relatively accurate data basis for subsequent calculations.

[0093] In one embodiment, step S11, that is, performing a real vehicle road coasting test on the vehicle with the engine sound shielded, and collecting the vehicle interior noise data and tire near-field noise data at different vehicle speeds, specifically includes the following steps:

[0094] S111: When it is determined that the test environment of the vehicle meets the vehicle exterior noise test standard, controlling the vehicle to accelerate, and when the vehicle speed reaches a preset speed, controlling the vehicle to coast in neutral, so that the vehicle speed is reduced from the preset speed to a vehicle stop;

[0095] S112: When the vehicle speed is reduced from a preset speed to a stop, the vehicle interior noise and tire near-field noise are collected to obtain the vehicle interior noise data and tire near-field noise data at different vehicle speeds.

[0096] In this embodiment, before the vehicle is subjected to a real-vehicle road coasting test, in order to ensure the accuracy of the test results, it is necessary to ensure that the vehicle test environment is free from other noise interference and that the test environment meets the vehicle exterior noise test standard. When it is determined that the vehicle test environment meets the vehicle exterior noise test standard, the first control device controls the vehicle to accelerate and, when the vehicle speed reaches a preset speed, controls the vehicle to coast in neutral so that the vehicle speed is reduced from the preset speed to 0 and the vehicle stops. In the process of the vehicle speed being reduced from the preset speed to 0 and the vehicle stops, the vehicle interior noise is collected by the vehicle interior noise collection device, and the tire near-field noise is collected by the tire near-field noise collection device to obtain vehicle interior noise data and tire near-field noise data at different vehicle speeds, so as to subsequently calculate the driving road noise data and driving wind noise data.

[0097] In this embodiment, the preset vehicle speed is a vehicle speed greater than or equal to 120 km / h, and the preset vehicle speed can be calibrated as needed. When performing a real vehicle road taxiing test, if the taxiing test runway is not long enough, the vehicle interior noise data and tire near-field noise data of different segmented taxiing are collected by segmented taxiing, and then the vehicle interior noise data and tire near-field noise data of the entire process of reducing the preset vehicle speed to 0 are spliced ​​and synthesized.

[0098] In one embodiment, since the tire near-field noise is transmitted to the interior of the vehicle through the vehicle structure, the noise will interfere and change, resulting in changes in the road noise heard in the vehicle later. Therefore, in order to ensure the accuracy of the driving road noise data and the driving wind noise data, in the process of the vehicle speed being reduced from a preset speed to a vehicle stop, it is also necessary to collect the tire acceleration at different vehicle speeds through an acceleration collection device to obtain tire acceleration data, so as to subsequently use the multiple coherent filtering analysis theory to perform road noise separation analysis based on the interior noise data and tire near-field noise data at different vehicle speeds, and obtain driving road noise data including road noise at different vehicle speeds and driving wind noise data including wind noise at different vehicle speeds, thereby improving the accuracy of the driving road noise data and the driving wind noise data.

[0099] In this embodiment, when it is determined that the vehicle test environment meets the vehicle exterior noise test standard, the vehicle is accelerated and the vehicle is controlled to coast in neutral when the vehicle speed reaches the preset speed, so that the vehicle speed is reduced from the preset speed to the vehicle stop. In the process of reducing the vehicle speed from the preset speed to the vehicle stop, the vehicle interior noise and tire near-field noise are collected to obtain the vehicle interior noise data and tire near-field noise data at different vehicle speeds, and the specific steps of performing a real vehicle road coasting test on the vehicle to shield the engine sound and collecting the vehicle interior noise data and tire near-field noise data at different vehicle speeds are clarified. During the test process, it is ensured that the vehicle test environment meets the vehicle exterior noise test standard, and the interference of other environmental noises is avoided, so as to ensure the accuracy of the data collected during the test process.

[0100] In one embodiment, step S12, that is, performing road noise separation analysis based on the in-vehicle noise data and the tire near-field noise data at different vehicle speeds to obtain driving road noise data including road noise at different vehicle speeds and driving wind noise data including wind noise at different vehicle speeds, specifically includes the following steps:

[0101] S121: Obtain a transfer function from the tire of the vehicle to the interior of the vehicle.

[0102] In this embodiment, since the tire near-field noise is transmitted to the vehicle interior through the vehicle structure, the noise will interfere and change, resulting in changes in the road noise heard in the vehicle later. In order to ensure the accuracy of the driving road noise data, it is necessary to obtain in advance the transfer function from the vehicle tire to the vehicle interior. In order to ensure the accuracy of the transfer function, the vehicle can be tested for the transfer function to obtain a more accurate transfer function from the vehicle tire to the vehicle interior, and the specific process will not be repeated.

[0103] S122: Obtain tire vibration acceleration data at different vehicle speeds, where the tire vibration acceleration data is tire acceleration data collected during a real vehicle road coasting test.

[0104] After obtaining the transfer function from the vehicle tire to the vehicle interior, it is necessary to obtain the tire vibration acceleration data, tire near-field noise data, and vehicle interior noise data at different vehicle speeds. The tire vibration acceleration data, tire near-field noise data, and vehicle interior noise data are the tire acceleration data, tire near-field noise data, and vehicle interior noise data collected during the actual vehicle road sliding test. The tire vibration acceleration data includes the tire acceleration at different vehicle speeds.

[0105] S123: Inputting the transfer function, the tire vibration acceleration data at different vehicle speeds, the in-vehicle noise data, and the tire near-field noise data into a multiple coherent filtering analysis model to separate the driving road noise data and the driving wind noise data.

[0106] After obtaining the tire vibration acceleration data, tire near-field noise data and vehicle interior noise data at different vehicle speeds, the transfer function, the tire vibration acceleration data, the vehicle interior noise data and the tire near-field noise data at different vehicle speeds are input into a multiple coherent filtering analysis model to separate the driving road noise data and the driving wind noise data.

[0107] The multiple coherent filtering analysis model is a multi-input multi-output MIMO model that takes tire vibration acceleration data and tire near-field noise data as input and takes vehicle interior noise data as output. Specifically, the multiple coherent filtering analysis model is shown in the following formula:

[0108] T i (t) = ∑X i (t)*Hj,i (t);

[0109] W i (t) = Y i (t)-T i (t);

[0110] Among them, T i (t) represents the road noise data, i.e., the road noise at different times (vehicle speeds); W i (t) represents the driving wind noise data, that is, the wind noise at different times (vehicle speeds); T i (t) represents the in-vehicle noise data collected by the digital binaural artificial head, that is, the in-vehicle noise at different times (vehicle speeds); X i (t) represents the superposition signal of the tire near-field noise data collected by the microphone and the tire vibration acceleration data collected by the acceleration sensor, that is, the superposition signal of the tire near-field noise at different times (vehicle speeds) and the tire acceleration at the corresponding time (vehicle speed); H j,i (t) represents the transfer function, j,i represents the number of transfer paths, and j represents the left ear or the right ear. For example, H 1,i (t) represents the left ear transfer function, H 2,i (t) represents the left ear transfer function.

[0111] Based on the theory of multiple coherence filtering, such as Figure 8 As shown, the tire vibration acceleration data includes the tire acceleration at different vehicle speeds collected by the acceleration sensor, the tire near-field noise data includes the tire near-field noise at different vehicle speeds collected by the microphone, the transfer function includes the left ear transfer function and the right ear transfer function, and the in-vehicle noise data includes the left ear noise data and the right ear noise data; the tire acceleration at different vehicle speeds and the tire near-field noise at the vehicle speed are combined as input (such as X1, X2...X 20 ), through the left ear transfer function (such as H 1,1 , H 2,1 ...H 20 ,1) is used to obtain the left ear road noise data T1, and then the right ear transfer function (H 1,2 , H 2,2 ...H 20,2) is transformed through interference to obtain the right ear road noise data T2, that is, the left ear road noise data and the right ear road noise data are summarized as the driving road noise data; then the left ear road noise data T1 is superimposed on the left ear wind noise data W1 to obtain an output, that is, the in-car noise data Y1 collected by the left ear of the binaural digital artificial head is obtained, and the right ear road noise data T2 is superimposed on the right ear wind noise data W2 to obtain an output, that is, the in-car noise data Y2 collected by the right ear of the binaural digital artificial head is obtained; reverse deduction can be performed to calculate the left ear wind noise data W1 and the right ear wind noise data W2 based on the in-car noise data, and then the left ear wind noise data W1 and the right ear wind noise data W2 are summarized as the driving wind noise data.

[0112] In this embodiment, by obtaining the transfer function transmitted from the vehicle tire to the vehicle interior and obtaining the tire vibration acceleration data at different vehicle speeds, the transfer function, the tire vibration acceleration data at different vehicle speeds, the vehicle interior noise data and the tire near-field noise data are input into the multiple coherent filtering analysis model to separate and obtain the driving road noise data and the driving wind noise data, and clarify the specific steps of performing road noise separation analysis based on the vehicle interior noise data and the tire near-field noise data at different vehicle speeds to obtain the driving road noise data including the road noise at different vehicle speeds and the driving wind noise data including the wind noise at different vehicle speeds. Based on the multiple coherent filtering theory, accurate driving road noise data and driving wind noise data can be calculated, providing a more accurate data basis for subsequent steps.

[0113] In one embodiment, if Fig. 9 As shown, in step S20, the vehicle is subjected to a universal characteristic engine noise test to obtain engine noise data under different engine operating conditions, which specifically includes the following steps:

[0114] S21: performing an acceleration noise test on the vehicle under a constant engine speed condition, and collecting the engine noise of the vehicle under different preset engine speeds and different accelerator pedal openings as the constant engine speed condition noise data.

[0115] It should be understood that in order to reduce the traversal operations required to traverse all engine speeds and all throttle pedal openings to obtain the engine noise under different engine speeds and different throttle pedal openings (engine torque), in this embodiment, only a plurality of preset engine speeds are selected to perform the acceleration noise test under the engine constant speed condition, and then the engine noise test is performed at several representative throttle pedal opening condition points according to the engine constant speed condition noise data, so as to obtain the engine noise data under different engine conditions, so as to reduce the test cycle, quickly obtain accurate engine noise data, and improve the noise data testing efficiency.

[0116] In this embodiment, the second test system includes a second analysis device, a second acquisition device connected to the second analysis device, and a second control device connected to the vehicle. The second acquisition device is installed in the cockpit of the vehicle to collect the in-vehicle noise, wherein the second acquisition device can be a digital binaural artificial head. When it is necessary to perform the engine universal characteristic working condition noise test, it is installed in the cockpit of the vehicle, such as on the driver's seat. The installation position can refer to the upper position, such as Figure 4 As shown; the vehicle is then fixed on the hub dynamometer to ensure that the vehicle drives the hub dynamometer to operate and the hub dynamometer drives the wheels to operate, thereby eliminating wind noise and road noise during road driving and directly testing the powertrain-related noise as the engine noise.

[0117] After the vehicle is fixed on the hub dynamometer and the second acquisition device is installed, the second acquisition device controls the vehicle to perform an acceleration noise test under the engine constant speed condition, and the engine acceleration noise of the vehicle under different preset engine speeds and different throttle openings is acquired by the second acquisition device as the engine constant speed condition noise data.

[0118] The preset engine speed can be calibrated according to actual needs. For example, the preset engine speed can be 1000RPM, 2000RPM, 3000RPM, 4000RPM, 5000RPM, 55000RPM and other engine speeds. During the test, a preset engine speed is selected, and then the vehicle is controlled to operate at the preset engine speed through a hub dynamometer. The vehicle's in-vehicle noise changes during the accelerator pedal opening (i.e., throttle opening) from 0% to 100% are tested to obtain the engine noise at different throttle pedal openings at the preset engine speed, and then the engine noise at different preset engine speeds and different throttle pedal openings is obtained by traversing and obtaining the engine noise at different preset engine speeds and different throttle pedal openings as the engine constant speed working condition noise data. According to the test results, when the vehicle is at preset engine speeds of 1000RPM, 2000RPM, 3000RPM, 4000RPM, 5000RPM, 55000RPM and the throttle opening is from 0% to 100%, the sound pressure level change curve of the in-vehicle noise is as follows: Fig.10 As shown, the unit of sound pressure level is dB(A).

[0119] In this embodiment, the preset engine speed may be 1000RPM, 2000RPM, 3000RPM, 4000RPM, 5000RPM, 55000RPM. This is only for exemplary description. In other embodiments, the preset engine speed may also be other speeds, which will not be repeated here.

[0120] S22: Analyze the noise data of the engine under constant speed condition to determine a plurality of accelerator pedal opening condition points that need to be tested.

[0121] After obtaining the engine constant speed working condition noise data, the second analysis device needs to analyze the engine constant speed working condition noise data to determine the multiple accelerator pedal opening working condition points that need to be tested. Among them, the change of the in-vehicle noise is determined according to the engine constant speed working condition noise data, more accelerator pedal opening working condition points are selected in the area where the in-vehicle noise change rate is large, and fewer accelerator pedal opening working condition points are selected in the area where the in-vehicle noise change rate is small, so that more representative accelerator pedal opening working condition points can be selected, on this basis, the test time cycle is reduced, thereby further improving the speed of obtaining the engine noise data through testing.

[0122] The noise data of the engine at constant speed is: Fig.11 or Fig.10 From the curve of the sound pressure level change of the interior noise in the vehicle, it can be clearly seen that the change rate of the interior noise sound pressure level curve at each preset engine speed is relatively large when the accelerator pedal opening (throttle opening) is in the range of 0%-40%. Therefore, more accelerator pedal opening operating points can be selected in the range of 0%-40%, and each 5% opening can be selected as the accelerator pedal opening operating point, such as Fig.11 As shown, the accelerator pedal opening operating points can be 0%, 5%, 10%, 15%, 20%, 20%, 30%, 30%, 40%; when the accelerator pedal opening (throttle opening) is in the range of 40%-10%, the rate of change of the interior noise sound pressure level curve at each preset engine speed is small, and the noise change is relatively stable. Therefore, within the range of 40%-100%, a small number of accelerator pedal opening operating points can be selected, and each interval of 10% (or 15%) opening can be selected as the accelerator pedal opening operating point, such as Fig.11 As shown, the accelerator pedal opening operating points can be 50%, 60%, 70%, 80%, 100%, etc.

[0123] In this embodiment, the selection of the accelerator pedal opening operating point is only for illustrative purposes. In other embodiments, the accelerator pedal opening operating point may also be selected according to other opening intervals, which will not be described in detail here.

[0124] S23: Based on the plurality of accelerator pedal opening operating points, an acceleration noise test is performed on the vehicle under a fixed accelerator pedal opening operating condition, and engine noises at different accelerator pedal opening operating points and different engine speeds are collected as engine noise data.

[0125] After determining the multiple throttle pedal opening operating points that need to be tested, the second control device needs to control the vehicle to perform an acceleration noise test under a fixed throttle opening condition based on the multiple throttle opening operating points, and collect the engine acceleration noise at different throttle opening operating points and different engine speeds through the second acquisition device as the engine noise data.

[0126] For example, a certain accelerator pedal opening operating point is determined, the accelerator pedal opening of the vehicle is controlled to remain at the accelerator pedal opening operating point, and then the rotary hub dynamometer is rotated to drive the vehicle's engine speed, gradually increasing from the minimum engine speed of the current gear to the maximum engine speed, and simultaneously collecting the engine noise at different engine speeds at the current accelerator pedal opening operating point; then all accelerator pedal opening operating points are traversed until the engine noise at different engine speeds at each accelerator pedal opening operating point is collected, thereby obtaining the engine noise data.

[0127] In this embodiment, the acceleration noise test of the vehicle under the engine constant speed working condition is performed, and the engine noise of the vehicle under different preset engine speeds and different throttle pedal openings is collected as the engine constant speed working condition noise data, and then the engine constant speed working condition noise data is analyzed to determine the multiple throttle pedal opening working condition points that need to be tested, and then based on the multiple throttle pedal opening working condition points, the acceleration noise test of the vehicle under the fixed throttle pedal opening working condition is performed, and the engine noise under different throttle pedal opening working condition points and different engine speeds is collected as the engine noise data, and the specific process of the engine noise data under different engine working conditions is clarified. Compared with the traditional avoidance of all engine working conditions (different engine speeds, different throttle pedal openings / engine torques), the test time can be reduced and accurate engine noise data can be quickly obtained.

[0128] In one embodiment, the vehicle is fixed on a silent rotating hub dynamometer. In step S21, the acceleration noise test of the vehicle under the condition of constant engine speed is performed, and the engine noise of the vehicle under different preset engine speeds and different accelerator pedal openings is collected, which specifically includes the following steps:

[0129] S211: Determine a preset engine speed;

[0130] S212: locking the gear of the vehicle and controlling the silent hub dynamometer to rotate so as to drive the vehicle to run at a preset engine speed;

[0131] S213: controlling the accelerator pedal opening of the vehicle to gradually increase from closed to fully open, and synchronously collecting engine noise at different accelerator pedal openings at a current preset engine speed;

[0132] S214: Traverse all preset engine speeds until the engine noise at different accelerator pedal openings at each preset engine speed is collected.

[0133] In this embodiment, in order to reduce the interference of the operating noise of the hub dynamometer, the hub dynamometer in this embodiment is a silent hub dynamometer. After the second acquisition device is installed and the vehicle is fixed to the silent hub dynamometer, the second control device first determines a preset engine speed, then locks the gear of the vehicle, and controls the silent hub dynamometer to rotate, so as to drive the vehicle to run at the preset engine speed. In the process of the mask vehicle running at the preset engine speed, the throttle pedal opening of the vehicle is controlled to gradually increase from closed to fully open, and the engine noise of different throttle pedal openings at the current preset engine speed is synchronously collected. Finally, all preset engine speeds are traversed until the engine noise of different throttle pedal openings at each preset engine speed is collected. The collected engine noise of different throttle pedal openings at different preset engine speeds is recorded as the engine constant speed operating noise data, so that the second analysis device can determine the throttle pedal opening operating point based on the engine constant speed operating noise data.

[0134] In this embodiment, by determining a certain preset engine speed, locking the gear of the vehicle, and controlling the silent rotary dynamometer to rotate, the vehicle is driven to run at the preset engine speed, and then the throttle pedal opening of the vehicle is controlled to gradually increase from closed to fully open, and the engine noise of different throttle pedal openings at the current preset engine speed is collected synchronously, and then all preset engine speeds are traversed until the engine noise of different throttle pedal openings at each preset engine speed is collected; the specific process of performing acceleration noise test on the vehicle under the engine fixed speed working condition and collecting the engine noise of the vehicle at different preset engine speeds and different throttle pedal openings is clarified. Fixing the vehicle on the silent rotary dynamometer can reduce the interference of the dynamometer operation noise and obtain more accurate engine noise. In addition, the gear is locked during the test to reduce the interference caused by gear change, and further ensure the accuracy of the engine noise obtained by the test.

[0135] In one embodiment, the vehicle is fixed on a silent rotating hub dynamometer. In step S23, based on multiple accelerator pedal opening operating points, an acceleration noise test is performed on the vehicle under a fixed accelerator pedal opening operating condition, and engine noise at different accelerator pedal opening operating points and different engine speeds is collected, specifically including the following steps:

[0136] S231: determining a certain accelerator pedal opening operating point, locking the gear of the vehicle, and controlling the accelerator pedal opening of the vehicle to remain at the accelerator pedal opening operating point;

[0137] S232: Controlling the silent rotary hub dynamometer to rotate, so as to drive the engine speed of the vehicle to gradually increase from the minimum engine speed of the current gear to the maximum engine speed, and simultaneously collecting the engine noise at different engine speeds under the current accelerator pedal opening operating point;

[0138] S233: Traversing all accelerator pedal opening operating points until the engine noise at different engine speeds at each accelerator pedal opening operating point is collected.

[0139] In the present embodiment, in order to reduce the interference of the operating noise of the hub dynamometer, the hub dynamometer in the present embodiment is a silent hub dynamometer. After determining multiple throttle pedal opening operating points, the second control device first determines a certain throttle pedal opening operating point, locks the gear of the vehicle, and controls the throttle pedal opening of the vehicle to remain in the throttle pedal opening operating condition; then controls the silent hub dynamometer to rotate, so as to drive the engine speed of the vehicle to gradually increase from the minimum engine speed of the current gear to the maximum engine speed, and simultaneously collects the engine noise at different engine speeds under the current throttle pedal opening operating point; finally, traverses all throttle pedal opening operating points until the engine noise at different engine speeds under each throttle pedal opening operating point is collected, and then the engine noise at different engine speeds under different throttle pedal opening operating points is recorded as the engine noise data under different engine conditions.

[0140] Among them, when controlling the silent hub dynamometer to rotate to drive the vehicle's engine speed to gradually increase from the minimum engine speed of the current gear to the maximum engine speed, in order to ensure the accuracy of the engine speed control, it is necessary to control the vehicle's engine speed to change according to a preset speed change curve, first maintain the minimum engine speed of the current gear, and then gradually increase to the maximum engine speed of the current gear in a short time, reduce the engine speed fluctuation, and ensure the accuracy of the collected noise data.

[0141] The preset speed change curve can be Fig.12 As shown, the engine speed (unit: r / min) changes with time (unit: s); the vehicle's engine speed is first controlled to run at the lowest speed (minimum engine speed) of the corresponding gear (locked gear) for a period of time, and then gradually increased to the maximum engine speed within 120s, so as to collect the engine noise at different engine speeds under the current accelerator pedal opening operating point.

[0142] In this embodiment, the preset speed change curve can be as follows: Fig.12 The figure is only an exemplary illustration. In other embodiments, the preset speed change curve may be other, for example, the time from the lowest speed of the corresponding gear (gradually increasing to the maximum speed of the engine may be 60s, 180s, 200s, etc.

[0143] In this embodiment, by determining a certain throttle pedal opening operating point, locking the gear of the vehicle, and controlling the throttle pedal opening of the vehicle to remain at the throttle pedal opening operating point; then controlling the silent rotary hub dynamometer to rotate to drive the engine speed of the vehicle, gradually increasing from the minimum engine speed of the current gear to the maximum engine speed, and synchronously collecting the engine noise at different engine speeds under the current throttle pedal opening operating point; then traversing all throttle pedal opening operating points until the engine noise at different engine speeds under each throttle pedal opening operating point is collected; the specific steps of performing acceleration noise testing on the vehicle under a fixed throttle pedal opening condition based on multiple throttle pedal opening operating points are clarified. Fixing the vehicle on the silent rotary hub dynamometer can reduce the interference of the dynamometer operation noise and the interference caused by gear shifting, and further ensure the accuracy of the engine noise obtained by the test.

[0144] In one embodiment, the vehicle noise testing system includes not only a vehicle, a first testing system, a second testing system and a noise synthesis device, such as Fig.13 As shown, it also includes a vehicle state monitoring system and a noise signal acquisition system. The first acquisition device of the first test system includes a digital binaural artificial head, a microphone and an acceleration sensor; the second test system includes a digital binaural artificial head and a rotary hub dynamometer (rotating stock dynamometer), and a second acquisition device; the vehicle is fixed to the rotary hub dynamometer, and the digital binaural artificial head is installed in the vehicle cockpit.

[0145] The vehicle status monitoring system can be connected to the vehicle through OBD (On-Board Diagnostics) to check the vehicle status information through the vehicle CAN bus signal, and realize the monitoring and control of vehicle status information such as vehicle engine speed, wheel speed, throttle pedal opening (accelerator pedal opening), brake pedal opening, cooling water temperature, and gear information. Before testing the vehicle (including actual vehicle road sliding noise test and engine universal characteristic working condition noise test), it is necessary to pre-test the vehicle and use the vehicle status monitoring system to check the vehicle status information, determine whether the vehicle is operating normally, and eliminate vehicle abnormalities to ensure the safety of the test process.

[0146] The noise signal acquisition system can be connected to the vehicle through OBD, obtain vehicle system parameters through the vehicle CAN bus signal, and receive the signals collected by the acquisition device (including digital binaural artificial head), and convert the signals collected by the acquisition device into test data that meets the requirements, so that the subsequent noise synthesis device (signal acquisition computer) can use it directly. Before testing the vehicle (including the actual vehicle road sliding noise test and the engine universal characteristic working condition noise test), it is necessary to first calibrate the parameters of the noise signal acquisition system, calibrate the sensors of the acquisition device and set the range of each sensor, so that the subsequent output is data that meets the format requirements. In addition, before testing the vehicle, it is necessary to control the operation of the vehicle first, and collect the signals of each sensor through the noise signal acquisition system to obtain the pre-experimental noise data, analyze the noise signal spectrum of the pre-experimental noise data, and determine whether the pre-experimental noise data is valid. If it is valid, the actual test will be carried out; if it is invalid, it needs to be debugged until the pre-experimental noise data is determined to be valid before the actual test can be carried out.

[0147] It should be understood that the order of execution of the steps in the above embodiment does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention.

[0148] In one embodiment, a vehicle noise testing system is provided, and the vehicle noise testing device corresponds one-to-one to the vehicle noise testing method in the above embodiment. Figure 1 As shown, the vehicle noise test system includes a vehicle for noise testing, a first test system, a second test system and a noise synthesis device. Each functional module is described in detail as follows:

[0149] The first test system is used to perform a real vehicle road sliding noise test on the vehicle with the engine sound shielded, and obtain the driving road noise data and driving wind noise data at different vehicle speeds;

[0150] The second test system is used to perform engine universal characteristic working condition noise test on the vehicle to obtain engine noise data under different engine working conditions;

[0151] The noise synthesis device is used to synthesize the engine noise data, driving wind noise data and driving road noise data into a full-operating condition vehicle interior noise data set.

[0152] Optionally, the vehicle noise test system also includes a sound playback test system, which is used to: when it is necessary to perform a noise performance evaluation test or noise source diagnosis on the vehicle, perform noise playback based on a full-operating condition in-vehicle noise data set to obtain the vehicle's noise performance evaluation data or noise source diagnosis data.

[0153] Optionally, the first test system includes a first analysis device, a first acquisition device connected to the first analysis device, and a first control device connected to the vehicle;

[0154] The first control device is used to: perform a real vehicle road sliding test on the vehicle with the engine sound shielded, and collect the in-vehicle noise data and tire near-field noise data at different vehicle speeds through the first collection device;

[0155] The first analysis device is used to perform road noise separation analysis based on the in-vehicle noise data and the tire near-field noise data at different vehicle speeds to obtain driving road noise data including road noise at different vehicle speeds and driving wind noise data including wind noise at different vehicle speeds.

[0156] Optionally, the second test system includes a second analyzing device, a second collecting device connected to the second analyzing device, and a second control device connected to the vehicle; the second collecting device is installed in the cockpit of the vehicle;

[0157] The second control device is used to: perform an acceleration noise test on the vehicle under the engine constant speed working condition, and collect the engine noise of the vehicle under different preset engine speeds and different accelerator pedal openings through the second collection device as the engine constant speed working condition noise data;

[0158] The second analysis device is used to: analyze the noise data of the engine under constant speed working condition to determine a plurality of accelerator pedal opening working condition points that need to be tested;

[0159] The second control device is also used to: perform an acceleration noise test on the vehicle under a fixed accelerator pedal opening condition based on multiple accelerator pedal opening operating points, and collect engine noise at different accelerator pedal opening operating points and different engine speeds as engine noise data.

[0160] Optionally, the second test system further comprises a silent rotating hub dynamometer connected to the second control device; the vehicle is fixed on the silent rotating hub dynamometer; the second control device is specifically used for:

[0161] determining a preset engine speed;

[0162] Lock the gear of the vehicle and control the silent hub dynamometer to drive the vehicle to run at a preset engine speed;

[0163] Control the vehicle's accelerator pedal opening to gradually increase from closed to fully open, and simultaneously collect engine noise at different accelerator pedal openings at the current preset engine speed;

[0164] All preset engine speeds are traversed until the engine noise at different accelerator pedal openings at each preset engine speed is collected.

[0165] The specific definition of the vehicle noise test system can be found in the definition of the vehicle noise test system method above, which will not be repeated here. Each system and device in the above vehicle noise test system can be implemented in whole or in part by software, hardware and their combination. The above modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0166] In one embodiment, Fig.14 As shown, a noise synthesis device is provided, which can be a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the above-mentioned vehicle noise testing method are implemented.

[0167] 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 steps of the above-mentioned vehicle noise testing method or the functions of the above-mentioned vehicle noise testing system are implemented.

[0168] A person skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and 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-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory.

[0169] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by 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.

[0170] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions 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 vehicle noise testing method, characterized in that: include: By performing a real vehicle road sliding noise test with the engine sound shielded, the driving road noise data and driving wind noise data at different vehicle speeds were obtained; By performing an engine universal characteristic operating condition noise test on the vehicle, engine noise data under different engine operating conditions are obtained; The engine noise data, the driving wind noise data and the driving road noise data are combined into a full-operating-condition vehicle interior noise data set.

2. The vehicle noise testing method according to claim 1, characterized in that: After the synthesis is performed into a full-operating-condition vehicle interior noise data set, the method further includes: When it is necessary to perform a noise performance evaluation test on the vehicle, replay the noise based on the full-operating-condition in-vehicle noise data set to obtain noise performance evaluation data of the vehicle; When it is necessary to perform noise source diagnosis on the vehicle, the noise data corresponding to the noise source to be diagnosed in the full-operating-condition vehicle interior noise data set is called to perform noise replay to obtain the noise source diagnosis data of the vehicle.

3. The vehicle noise testing method according to claim 2, characterized in that: When the noise performance evaluation test of the vehicle needs to be performed, noise replay is performed based on the full-operating-condition vehicle interior noise data set to obtain the noise performance evaluation data of the vehicle, including: When it is necessary to perform an in-vehicle noise performance evaluation test on the vehicle, determining whether the full-operating-condition in-vehicle noise data set includes full-operating-condition mixed noise data, where the full-operating-condition mixed noise data is mixed noise data synthesized based on the engine noise data, the driving wind noise data, and the driving road noise data, and is applicable to different vehicle operating conditions; If the mixed noise data of all working conditions is included, then the mixed noise data corresponding to the working condition to be evaluated is determined in the mixed noise data of all working conditions as the target playback noise data; The target playback noise data is played to evaluate the interior noise performance of the vehicle, thereby obtaining noise performance evaluation data of the vehicle.

4. The vehicle noise testing method according to claim 2, characterized in that: The engine noise data includes engine noise at different engine speeds and different accelerator pedal openings. When the noise performance evaluation test of the vehicle needs to be performed, noise replay is performed based on the full-operating-condition in-vehicle noise data set to obtain the noise performance evaluation data of the vehicle, including: When the full-operating-condition vehicle interior noise data set does not include full-operating-condition mixed noise data, determining a target vehicle speed, a target engine speed, and a target accelerator pedal opening corresponding to the operating condition to be evaluated; In the engine noise data, a target engine noise corresponding to the target engine speed and the target accelerator pedal opening is determined, in the wind noise data, a target wind noise corresponding to the target vehicle speed is determined, and in the road noise data, a target road noise corresponding to the target vehicle speed is determined; synthesizing the target engine noise, the target wind noise and the target road noise into mixed noise data of the vehicle operating condition to be evaluated as target playback noise data; The target playback noise data is played to evaluate the interior noise performance of the vehicle, thereby obtaining noise performance evaluation data of the vehicle.

5. The vehicle noise testing method according to claim 1, characterized in that: The driving road noise data and the driving wind noise data are obtained in the following manner: Performing a real vehicle road coasting test on the vehicle with engine sound shielded, and collecting in-vehicle noise data and tire near-field noise data at different vehicle speeds; Road noise separation analysis is performed based on the in-vehicle noise data and the tire near-field noise data at different vehicle speeds to obtain the driving road noise data including road noise at different vehicle speeds and the driving wind noise data including wind noise at different vehicle speeds.

6. The vehicle noise testing method according to claim 5, characterized in that: The vehicle is subjected to a real vehicle road coasting test with engine sound shielded, and in-vehicle noise data and tire near-field noise data at different vehicle speeds are collected, including: When it is determined that the test environment of the vehicle meets the vehicle exterior noise test standard, controlling the vehicle to accelerate, and when the vehicle speed reaches a preset speed, controlling the vehicle to coast in neutral, so that the vehicle speed is reduced from the preset speed until the vehicle stops; In the process of the vehicle speed decreasing from the preset speed to the vehicle stopping, the interior noise and tire near-field noise of the vehicle are collected to obtain the interior noise data and the tire near-field noise data at different vehicle speeds.

7. The vehicle noise testing method according to claim 5, characterized in that: The road noise separation analysis is performed based on the in-vehicle noise data and the tire near-field noise data at different vehicle speeds to obtain the driving road noise data including road noise at different vehicle speeds and the driving wind noise data including wind noise at different vehicle speeds, including: Obtaining a transfer function from the vehicle tire to the vehicle interior; Acquiring tire vibration acceleration data at different vehicle speeds, wherein the tire vibration acceleration data is tire acceleration data collected during the actual vehicle road coasting test; The transfer function, the tire vibration acceleration data at different vehicle speeds, the in-vehicle noise data and the tire near-field noise data are input into a multiple coherent filtering analysis model to separate the driving road noise data and the driving wind noise data.

8. The vehicle noise testing method according to claim 1, characterized in that: The engine noise data is obtained in the following manner: Performing an acceleration noise test on the vehicle under a constant engine speed condition, and collecting the engine noise of the vehicle under different preset engine speeds and different accelerator pedal openings as the constant engine speed condition noise data; Analyzing the noise data of the engine under constant speed condition to determine a plurality of accelerator pedal opening condition points that need to be tested; Based on the plurality of accelerator pedal opening operating points, an acceleration noise test is performed on the vehicle under a fixed accelerator pedal opening operating condition, and engine noise at different accelerator pedal opening operating points and different engine speeds is collected as the engine noise data.

9. The vehicle noise testing method according to claim 8, characterized in that: The vehicle is fixed on a silent rotating hub dynamometer; the acceleration noise test of the vehicle under the condition of constant engine speed is performed, and the engine noise of the vehicle under different preset engine speeds and different accelerator pedal openings is collected, including: determining a predetermined engine speed; Locking the gear of the vehicle and controlling the silent rotary hub dynamometer to rotate so as to drive the vehicle to run at the preset engine speed; Controlling the accelerator pedal opening of the vehicle to gradually increase from closed to fully open, and synchronously collecting engine noise at different accelerator pedal openings at the current preset engine speed; All the preset engine speeds are traversed until the engine noise at different accelerator pedal openings at each of the preset engine speeds is collected.

10. The vehicle noise testing method according to claim 8, characterized in that: The method of performing an acceleration noise test of the vehicle under a fixed accelerator pedal opening condition based on the plurality of accelerator pedal opening operating points, and collecting engine noise under different accelerator pedal opening operating points and different engine speeds, includes: Determining a certain accelerator pedal opening operating point, locking the gear position of the vehicle, and controlling the accelerator pedal opening of the vehicle to remain at the accelerator pedal opening operating point; Controlling the silent rotary hub dynamometer to rotate so as to drive the engine speed of the vehicle to gradually increase from the minimum engine speed of the current gear to the maximum engine speed, and simultaneously collecting the engine noise at different engine speeds under the current accelerator pedal opening operating point; All the accelerator pedal opening operating points are traversed until the engine noise at different engine speeds at each accelerator pedal opening operating point is collected.

11. The vehicle noise testing method according to any one of claims 1 to 10, characterized in that: The full-operating-condition vehicle interior noise data set is obtained in the following way: Determine the vehicle speed and engine operating conditions corresponding to a certain vehicle operating condition; In the engine noise data, determine the engine noise corresponding to the engine operating condition, in the driving wind noise data, determine the wind noise corresponding to the vehicle speed, and in the driving road noise data, determine the road noise corresponding to the vehicle speed; The corresponding engine noise, the corresponding wind noise and the corresponding road noise are synthesized into mixed noise data of the vehicle operating condition, and all the vehicle operating conditions are traversed to obtain mixed noise data of all the vehicle operating conditions, and recorded as all-operating-condition mixed noise data; The full-operating-condition mixed noise data, the engine noise data, the driving wind noise data and the driving road noise data are combined into the full-operating-condition in-vehicle noise data set.

12. The vehicle noise testing method according to claim 11, characterized in that: The engine noise data includes the engine noise of the vehicle at different engine speeds and different accelerator pedal openings. In the engine noise data, determining the engine noise corresponding to the engine operating condition includes: Determining the engine speed and accelerator pedal opening corresponding to the engine operating condition; In the engine noise data, the engine noise pointed to by the corresponding engine speed and accelerator pedal opening is determined to obtain the engine noise corresponding to the engine operating condition.

13. A vehicle noise testing system, comprising a vehicle for performing noise testing, characterized in that: Also includes: The first test system is used to perform a real vehicle road sliding noise test on the vehicle with engine sound shielded, to obtain driving road noise data and driving wind noise data at different vehicle speeds; A second test system is used to perform a universal characteristic engine noise test on the vehicle to obtain engine noise data under different engine operating conditions; The noise synthesis device is used to synthesize the engine noise data, the driving wind noise data and the driving road noise data into a full-operating-condition vehicle interior noise data set.

14. The vehicle noise testing system according to claim 13, characterized in that: The vehicle noise test system also includes a sound playback test system, which is used to: when it is necessary to perform a noise performance evaluation test or noise source diagnosis on the vehicle, perform noise playback based on the full-operating-condition vehicle interior noise data set to obtain noise performance evaluation data or noise source diagnosis data for the vehicle.

15. A readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the vehicle noise testing method according to any one of claims 1 to 12 are implemented, or the functions of the vehicle noise testing system according to any one of claims 13 to 14 are implemented.

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