NVH performance detection method and device of driving system

Abstract

The invention relates to the technical field of drive detection, and provides an NVH performance detection method and device of a drive system. The method comprises the following steps: acquiring noise data of each order of a to-be-tested driving system under a preset working condition; comparing the noise data of the to-be-detected driving system at each order with the noise data of the reference order to obtain an NVH performance detection result of the driving system under the preset working condition; wherein the reference order noise data is determined according to the noise data of each order of at least one qualified driving system sample under the preset working condition, and the driving system sample and the to-be-tested driving system have the same specification. According to the NVH performance detection method of the driving system provided by the embodiment of the invention, the accuracy of NVH performance detection of the driving system can be improved.

Description

Technical Field

[0001] This application relates to the field of drive testing technology, specifically to a method and apparatus for testing the NVH performance of a drive system. Background Technology

[0002] NVH (Noise, Vibration, and Harshness) performance is one of the important indicators of a vehicle, directly affecting the driving and riding experience of passengers. The main factors affecting the NVH performance of a vehicle come from the vehicle's drive system; therefore, it is usually necessary to test the NVH performance of the vehicle's drive system.

[0003] In related technologies, the NVH performance of a drive system is tested by establishing an NVH limit curve representing the relationship between speed and noise during normal drive system operation. This curve is then used to assess the NVH performance of the drive system. However, this method relies solely on total noise, which is a mixture of various frequencies. Therefore, when using a single NVH limit curve to test the NVH performance of a drive system, the superposition or cancellation effects of noise of different orders can easily lead to misjudgments, affecting the accuracy of the NVH performance test. Summary of the Invention

[0004] This application aims to address at least one of the technical problems existing in related technologies. To this end, this application proposes a method for detecting the NVH performance of a drive system, which can improve the accuracy of NVH performance detection for drive systems.

[0005] The NVH performance testing method for a drive system according to the first aspect of this application includes: Acquire noise data of the drive system under test at each order under preset operating conditions; The noise data of the drive system under test at each order are compared with the noise data of the reference order to obtain the NVH performance test results of the drive system under the preset operating conditions. The reference order noise data is determined based on the noise data of each order under the preset operating conditions from at least one qualified drive system sample, and the drive system sample has the same specifications as the drive system under test.

[0006] By acquiring noise data of the drive system under test at each order under preset operating conditions, and comparing this noise data with reference order noise data, the NVH performance test results of the drive system under preset operating conditions are obtained. The reference order noise data is determined based on the noise data of at least one qualified drive system sample with the same specifications as the drive system under test at each order under preset operating conditions. This comparison utilizes noise data strongly correlated with specific rotating components of the drive system to achieve NVH performance testing of the drive system, effectively suppressing misjudgments caused by the mutual cancellation or superposition of different order noises, thereby improving the accuracy of NVH performance testing of the drive system.

[0007] According to one embodiment of this application, the method further includes: The reference order noise data is determined based on the maximum noise data of each order of at least one drive system sample under the preset operating conditions.

[0008] According to one embodiment of this application, determining the reference order noise data based on the maximum noise data of each order of at least one drive system sample under the preset operating condition includes: Based on the maximum noise data of each drive system sample at any order under the preset operating conditions, the reference noise data of the order is obtained. The reference order noise data is obtained based on the reference noise data for each of the aforementioned orders.

[0009] According to one embodiment of this application, the reference noise data for the specified order is obtained based on the maximum noise data of each drive system sample at any order under the preset operating condition, including: Based on the maximum noise data of each drive system sample at any order under the preset operating conditions, the average noise value and noise standard deviation corresponding to the order are obtained. The baseline noise data for the specified order is obtained based on the average noise value and noise standard deviation corresponding to that order.

[0010] According to one embodiment of this application, the reference noise data for the specified order is obtained based on the maximum noise data of each drive system sample at any order under the preset operating condition, including: The target parameters obtained from the maximum noise data of any order under the preset operating conditions of each drive system sample are input into the operation model corresponding to the order type of the order to obtain the reference noise data of the order. The target parameter includes at least one of the average noise value or the noise standard deviation, and the order type is determined according to the type of the drive system under test. The order type includes major order and non-major order, and the amplification factor of the operation model corresponding to the major order is smaller than the amplification factor of the non-major order.

[0011] According to one embodiment of this application, the reference order noise data is obtained based on the reference noise data for each of the aforementioned orders, including: Based on the reference noise data of each order, the initial order noise data is obtained; The noise data of the vehicle equipped with the drive system sample under the preset operating conditions at each order are compared with the initial order noise data to obtain the NVH performance test results of the vehicle under the preset operating conditions. The NVH performance test results of each vehicle under the preset operating conditions are determined to be normal. Based on the initial order noise data, the reference order noise data is obtained.

[0012] According to one embodiment of this application, it also includes: If the NVH performance test result of the vehicle under the preset working condition is determined to be abnormal, the drive system sample of the vehicle with the abnormal NVH performance test result is removed from each drive system sample to update each drive system sample; Based on the maximum noise data of each of the updated drive system samples at any order under the preset operating conditions, the reference noise data of the order is obtained, so as to update the initial order noise data according to the reference noise data of each order.

[0013] The NVH performance testing device for a drive system according to a second aspect embodiment of this application includes: The data acquisition module is used to acquire noise data of the drive system under test at various orders under preset operating conditions; The performance testing module is used to compare the noise data of the drive system under test at each order with the noise data of the reference order to obtain the NVH performance test results of the drive system under the preset operating conditions. The reference order noise data is determined based on the noise data of each order under the preset operating conditions from at least one qualified drive system sample, and the drive system sample has the same specifications as the drive system under test.

[0014] An electronic device according to a third aspect of this application includes a processor and a memory storing a computer program, wherein the processor executes the computer program to implement the NVH performance detection method of the drive system described in any of the above embodiments.

[0015] A computer-readable storage medium according to a fourth aspect of this application stores a computer program thereon, which, when executed by a processor, implements the NVH performance detection method of the drive system described in any of the above embodiments. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of NVH limit curves provided in the embodiments of this application; Figure 2 A flowchart illustrating the NVH performance testing method for a drive system provided in this application embodiment; Figure 3 A first schematic diagram of reference order noise data provided in an embodiment of this application; Figure 4 A second schematic diagram of the reference order noise data provided in the embodiments of this application; Figure 5 A flowchart illustrating the method for acquiring reference order noise data provided in an embodiment of this application; Figure 6 This is a schematic diagram of the NVH performance testing device for the drive system provided in the embodiments of this application; Figure 7 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] The NVH performance testing method and apparatus for the drive system provided in this application will be described in detail below through several specific embodiments.

[0020] NVH (Noise, Vibration, and Harshness) performance is one of the most important indicators of a vehicle, directly affecting the driving and riding experience. The main factors influencing a vehicle's NVH performance originate from its drive system, such as the electric drive system of new energy vehicles, or the traditional drive system consisting of an engine and / or transmission in a gasoline vehicle. Therefore, it is usually necessary to test the NVH performance of the vehicle's drive system.

[0021] In related technologies, the method for testing the NVH performance of a drive system is based on the speed and noise during normal drive system operation to form an NVH limit curve characterizing the relationship between speed and noise. The NVH performance of the drive system is then tested based on this NVH limit curve. Figure 1 As shown. However, this detection method relies solely on total noise for judgment, and total noise is a mixture of sounds of various frequencies. Therefore, when using a single NVH limit curve to test the NVH performance of the drive system, the superposition or cancellation effect of noise of different orders can easily lead to misjudgment, thus affecting the accuracy of the NVH performance test of the drive system.

[0022] To address the aforementioned technical problems, this application embodiment acquires noise data of the drive system under test at various orders under preset operating conditions. This noise data is then compared with reference order noise data to obtain the NVH performance test results of the drive system under preset operating conditions. The reference order noise data is determined based on the noise data of at least one qualified drive system sample with the same specifications as the drive system under test at various orders under preset operating conditions. By comparing noise data of orders strongly correlated with specific rotating components of the drive system, the NVH performance of the drive system can be tested, effectively suppressing misjudgments caused by the mutual cancellation or superposition of different orders of noise, thereby improving the accuracy of the NVH performance test of the drive system.

[0023] According to some embodiments of this application, this application provides a method for NVH performance testing of a drive system. This method can be applied to terminal devices for NVH performance testing of drive systems. The terminal device may include an in-vehicle terminal, a desktop terminal, a mobile terminal, or a server. The server can be a standalone server or a server cluster composed of multiple servers. It can also be a cloud server providing basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, CDN, and big data and artificial intelligence sampling point devices.

[0024] like Figure 2 As shown in the figure, the NVH performance testing method for a drive system provided in this embodiment includes: S101, acquire noise data of the drive system under test at each order under preset operating conditions; S102, compare the noise data of the drive system under test at each order with the noise data of the reference order to obtain the NVH performance test results of the drive system under the preset working conditions. The reference order noise data is determined based on the noise data of each order under the preset operating conditions from at least one qualified drive system sample, and the drive system sample has the same specifications as the drive system under test.

[0025] In some embodiments, the drive system under test can be an electric drive system of a new energy vehicle, such as a pure electric vehicle or a hybrid vehicle, or a conventional drive system of an internal combustion engine vehicle. Here, an electric drive system can refer to a drive assembly including a drive motor and a reducer, while a conventional drive system can refer to a drive assembly including an engine and a transmission.

[0026] The preset operating condition can be at least one of acceleration or deceleration conditions. For example, it can acquire noise data of the drive system under test at each order under acceleration, or acquire noise data of the drive system under test at each order under deceleration, or acquire noise data of the drive system under test at each order under both acceleration and deceleration conditions.

[0027] The noise data of the drive system under test at each order under the preset operating conditions can refer to the noise data of the drive system under test at each order within the full speed range under the preset operating conditions. For example, if the preset operating condition is the acceleration condition, then the noise data of the drive system under test at each order under the preset operating conditions can refer to the noise data of the drive system under test at each order within the full speed range during the acceleration phase.

[0028] The method for acquiring noise data of the drive system under test at each order under preset operating conditions can be to acquire NVH noise data of the drive system under test across the entire speed range under the preset operating conditions, and then perform order analysis to obtain noise data of each order, i.e., all noise data of each order across the entire speed range. Here, the entire speed range of the drive system under test refers to the interval from the lowest speed to the highest speed of the drive system under test.

[0029] In some embodiments, noise data of at least one qualified drive system sample under preset operating conditions can be obtained in advance to generate reference order noise data based on the noise data of at least one drive system sample under preset operating conditions. The noise data of the drive system sample under preset operating conditions can be obtained by acquiring NVH noise data of the drive system sample across the entire speed range under the preset operating conditions and performing order analysis to obtain the noise data for each order. The drive system sample has the same specifications as the drive system under test. For example, if the drive system under test is an electric drive assembly consisting of an 8-pole permanent magnet synchronous motor and a 10:1 reducer, then the drive system sample is also an electric drive assembly consisting of an 8-pole permanent magnet synchronous motor and a 10:1 reducer.

[0030] As one possible implementation, reference order noise data is generated based on noise data of at least one drive system sample at each order under a preset operating condition. This can be achieved by acquiring all noise data of a drive system sample at any order within the full speed range under the preset operating condition, and then determining the reference noise data of the drive system sample at that order based on the average value of the noise data. For example, the average value of the noise data at that order can be used as the reference noise data of the drive system sample at that order. By performing linear fitting on the noise data of the drive system sample at each order, the reference order noise data corresponding to the preset operating condition can be obtained.

[0031] As another possible implementation, if multiple drive system samples exist, the noise data of a certain drive system sample at any order within the full speed range under the preset operating condition can be obtained. The noise data of the drive system sample at that order is determined based on the average value of the noise data at that order. Then, the maximum value of the noise data of all drive system samples at that order is determined as the reference noise data for that order. Linear fitting is then performed on the reference noise data for each order to obtain the reference order noise data corresponding to the preset operating condition. The number of drive system samples can be selected according to the actual situation, such as 50 to 500 units.

[0032] In some embodiments, the noise data of the drive system under test at each order can be compared with the noise data of a reference order. If all the noise data of the drive system under test at each order are less than or equal to the reference noise data of the reference order at that order, then the NVH performance test result of the drive system under the preset operating conditions can be determined to be normal. If, among all the noise data of the drive system under test at a certain order, there is noise data that is greater than the reference noise data of the reference order at that order, then the NVH performance test result of the drive system under the preset operating conditions can be determined to be abnormal.

[0033] Alternatively, in a two-dimensional coordinate system with noise level as the x-axis and noise level as the y-axis, an NVH limit curve corresponding to the baseline noise level can be established. Based on this NVH limit curve and the x and y coordinates, an NVH limit region can be formed. If the coordinates of the noise data of the drive system under test at each order in the two-dimensional coordinate system all lie within the NVH limit region, such as below the NVH limit curve, then the NVH performance test results of the drive system under the preset operating conditions can be determined to be normal; otherwise, the NVH performance test results of the drive system under the preset operating conditions can be determined to be abnormal.

[0034] In addition, when the NVH performance test results show abnormal NVH performance, the level of NVH performance abnormality can be located for targeted improvement.

[0035] By acquiring noise data of the drive system under test at each order under preset operating conditions, and comparing this noise data with reference order noise data, the NVH performance test results of the drive system under preset operating conditions are obtained. The reference order noise data is determined based on the noise data of at least one qualified drive system sample with the same specifications as the drive system under test at each order under preset operating conditions. This comparison utilizes noise data strongly correlated with specific rotating components of the drive system to achieve NVH performance testing of the drive system, effectively suppressing misjudgments caused by the mutual cancellation or superposition of different order noises, thereby improving the accuracy of NVH performance testing of the drive system.

[0036] To further improve the accuracy of NVH performance testing of the drive system, in some embodiments, the method further includes: determining the reference order noise data based on the maximum noise data of each order of at least one drive system sample under the preset operating conditions.

[0037] In some embodiments, the reference order noise data can be determined in advance based on the maximum noise data of each order of at least one drive system sample under preset operating conditions.

[0038] For example, all noise data of a drive system sample at any order within the full speed range under preset operating conditions are acquired. The maximum noise data among all noise data at that order is determined as the reference noise data of the drive system sample at that order. By performing linear fitting on the noise data of the drive system sample at each order, the reference order noise data corresponding to the preset operating conditions can be obtained. This improves the reliability of the reference order noise data, thereby improving the accuracy of NVH performance testing of the drive system.

[0039] To further improve the accuracy of NVH performance testing of the drive system, in some embodiments, the reference order noise data is determined based on the maximum noise data of each order of at least one drive system sample under the preset operating condition, including: Based on the maximum noise data of each drive system sample at any order under the preset operating conditions, the reference noise data of the order is obtained. The reference order noise data is obtained based on the reference noise data for each of the aforementioned orders.

[0040] For example, all noise data of any drive system sample at any order under preset operating conditions within the full speed range can be obtained, and the drive system sample a can be extracted. i In this order i All noise data X = {x1, X2, ..., X} m The maximum noise data X in} max Where m represents the number of noise data points. For each driving system sample A = {a1, a2, ..., a...} n} In the order of maximum noise data X={(x max ,a1),(x max (a2), ... (x) max a n The maximum value among the maximum noise data can be used as the baseline noise data for that order. Here, n represents the number of samples in the driving system, (x... max a i ) represents the maximum noise data of the i-th system-driven sample at a certain order.

[0041] After obtaining the basic noise data for each order, the basic noise data for each order can be combined to obtain the reference order noise data; alternatively, the basic noise data for each order can be linearly fitted to obtain the reference order noise data. This improves the reliability of the reference order noise data, and further improves the accuracy of NVH performance testing of the drive system.

[0042] To further improve the accuracy of NVH performance testing of the drive system, in some embodiments, a reference noise data for the specified order is obtained based on the maximum noise data of each drive system sample under the preset operating conditions, including: Based on the maximum noise data of each drive system sample at any order under the preset operating conditions, the average noise value and noise standard deviation corresponding to the order are obtained. The baseline noise data for the specified order is obtained based on the average noise value and noise standard deviation corresponding to that order.

[0043] For example, we can first obtain samples A={a1, a2, ... a3} of each driving system. n} Under preset operating conditions, the maximum noise data X = {(x max ,a1),(x max (a2), ... (x)max a n Based on the maximum noise data, the average value of each maximum noise data can be calculated. and standard deviation The average value This is the average noise value corresponding to that order, and its standard deviation. This is the noise standard deviation corresponding to that order.

[0044] Adding the average noise value and the standard deviation of the noise level corresponding to each order yields the reference noise data for that order. For example, the reference noise data for that order could be... Alternatively, the noise standard deviation can be appropriately amplified to make the obtained reference noise data more accurate, such as... .in, This represents the magnification factor, which can be set according to the actual situation.

[0045] Considering that vibration and noise sources of different orders have varying degrees of excitation on the drive system, and that human hearing and sensory perception differ in their sensitivity to different frequencies, some orders of NVH are caused by vibrations and noise sources induced by powerful excitation sources (ignition, meshing forces), and their frequencies happen to fall within the drive system's natural frequency or the human ear's sensitive range, thus being significantly amplified and perceived. Conversely, other orders of NVH may be ignored due to low excitation energy, attenuation by the drive system, or insensitivity of the human ear, resulting in imperceptibility. Therefore, to further improve the accuracy of NVH performance testing of the drive system, in some embodiments, the reference noise data for each order is obtained based on the maximum noise data of each drive system sample under the preset operating conditions, including: The target parameters obtained from the maximum noise data of any order under the preset operating conditions of each drive system sample are input into the operation model corresponding to the order type of the order to obtain the reference noise data of the order. The target parameter includes at least one of the average noise value or the noise standard deviation, and the order type is determined according to the type of the drive system under test. The order type includes major order and non-major order, and the amplification factor of the operation model corresponding to the major order is smaller than the amplification factor of the non-major order.

[0046] In some embodiments, the dominant order refers to the order corresponding to a powerful excitation event. The NVH of this order is caused by vibrations and noise sources induced by the powerful excitation source, and its frequency falls precisely within the natural frequency of the drive system or the sensitive region of the human ear, making it significantly amplified and perceptible. Non-dominant orders refer to orders other than the dominant order. The dominant and non-dominant orders can be determined based on the type of drive system under test. For example, if the drive system under test is an electric drive assembly consisting of an 8-pole permanent magnet synchronous motor and a 10:1 reducer, then the dominant orders include the pole-passing order 48 and its multiples 96, 144, etc., as well as the electrical order 2 times 8 and its multiples 16, 24, 32, etc., and the mechanical transmission order 80, 480, etc. All other orders besides the dominant order are non-dominant orders.

[0047] Since the primary order can be significantly amplified and perceived, while the non-primary order is difficult to perceive, the noise limits for the non-primary order can be set more leniently than those for the primary order to avoid over-engineering.

[0048] Specifically, based on the maximum noise data of each drive system sample at any order under preset operating conditions, the average noise value and / or noise standard deviation corresponding to that order can be calculated. If that order is the dominant order, then the average noise value corresponding to that order can be... and / or noise standard deviation Input the computational model corresponding to the major order, such as This is done to obtain the baseline noise data for that order; if the order is not a primary order, then the average noise value corresponding to that order can be obtained. and / or noise standard deviation Input the computational model corresponding to the non-major order, such as In order to obtain the reference noise data for this order.

[0049] This allows for stricter constraints on the primary order of powerful excitation events, while more lenient constraints are applied to the secondary order, which is difficult to perceive. Instead of pursuing small improvements across all orders, the baseline order noise data, based on the baseline noise data of each order, can help to more efficiently evaluate the overall balance between NVH performance and cost of the drive system, avoiding over-engineering.

[0050] After obtaining the reference noise data for all major and non-major orders, a linear fit can be performed on these reference noise data to obtain the reference order noise data corresponding to the preset operating condition. For example, experimental verification shows that if the preset operating condition is an acceleration condition, the reference noise data for each order under the acceleration condition can be linearly fitted to obtain the reference order noise data, i.e., the NVH limit curve for the acceleration phase, as shown below. Figure 3 As shown in the figure. Similarly, if the preset operating condition is a deceleration condition, the reference noise data for each order under the deceleration condition can be linearly fitted to obtain the reference order noise data, i.e., the NVH limit curve of the deceleration stage, as shown in the figure. Figure 4 As shown.

[0051] To further improve the accuracy of NVH performance testing of the drive system, in some embodiments, the reference order noise data is obtained based on the reference noise data of each order, including: Based on the reference noise data of each order, the initial order noise data is obtained; The noise data of the vehicle equipped with the drive system sample under the preset operating conditions at each order are compared with the initial order noise data to obtain the NVH performance test results of the vehicle under the preset operating conditions. The NVH performance test results of each vehicle under the preset operating conditions are determined to be normal. Based on the initial order noise data, the reference order noise data is obtained.

[0052] In some embodiments, different drive system samples can be pre-installed on different vehicles, and noise data of each vehicle at each level under preset operating conditions can be obtained and stored in a database.

[0053] For the obtained benchmark noise data of each order, the benchmark noise data of each order can be sorted in ascending order to obtain the initial order noise data; or, the benchmark noise data of each order can be linearly fitted to obtain the initial order noise data.

[0054] The initial noise data is compared with the noise data of each vehicle at each noise level. If all noise data for each vehicle at each noise level are less than or equal to the baseline noise data of the initial noise level at the corresponding level, then the NVH performance test result of each vehicle under the preset operating conditions can be determined as normal. If the NVH performance test result of each vehicle under the preset operating conditions is normal, it means that there will be no difference in performance after each drive system sample is installed in the actual vehicle, so the obtained initial noise data can be judged as reliable. At this time, the initial noise data can be determined as the baseline noise data. This improves the reliability of the obtained baseline noise data, and thus improves the accuracy of subsequent NVH performance testing of the drive system under test using the baseline noise data.

[0055] In some embodiments, the method further includes: If the NVH performance test result of the vehicle under the preset working condition is determined to be abnormal, the drive system sample of the vehicle with the abnormal NVH performance test result is removed from each drive system sample to update each drive system sample; Based on the maximum noise data of each of the updated drive system samples at any order under the preset operating conditions, the reference noise data of the order is obtained, so as to update the initial order noise data according to the reference noise data of each order.

[0056] In some embodiments, if a vehicle has noise data exceeding the baseline noise data of the initial order at a certain order among all noise data of a certain order, then the NVH performance test result of that vehicle under preset operating conditions can be determined as abnormal. For each abnormal vehicle with an abnormal NVH performance test result, it can be determined that the drive system samples equipped in these abnormal vehicles will exhibit different performance after being installed in the actual vehicle. Therefore, the drive system samples equipped in these abnormal vehicles can be removed from all drive system samples to update the drive system samples. Then, based on the maximum noise data of each drive system sample under preset operating conditions at each order, a new baseline noise data for each order is obtained to form new initial order noise data. After obtaining the new initial order noise data, this initial noise data is compared with the noise data of each vehicle corresponding to the updated drive system samples at each order to re-evaluate the initial order noise data based on the NVH performance test results of each vehicle under preset operating conditions. This process continues until the NVH performance test results for each vehicle under preset operating conditions are all normal. At this point, the initial order noise data obtained will be determined as the baseline order noise data.

[0057] For example, assuming there are 50 drive system samples, these 50 drive system samples can be installed on 50 vehicles respectively, and the noise data of each vehicle under preset operating conditions at each order can be obtained and stored in a database. If, through the above method, it is detected that the NVH performance of 10 vehicles under preset operating conditions is abnormal, then the drive system samples installed on these 10 vehicles are removed from the 50 drive system samples. Based on the maximum noise data of the remaining 40 drive system samples at each order under preset operating conditions, the baseline noise data for each order is obtained, and the initial order noise data is updated based on the baseline noise data for each order. Then, the noise data of the vehicles with the remaining 40 drive system samples at each order under preset operating conditions is compared with the updated initial order noise data to detect whether there are any vehicles with abnormal NVH performance among the remaining 40 vehicles. If so, the above steps are repeated. This process continues until the NVH performance test results of all remaining vehicles are normal. The latest initial order noise data obtained at this point is then designated as the baseline order noise data. This improves the reliability of the acquired baseline order noise data, thereby enhancing the accuracy of subsequent NVH performance testing of the drive system under test using this baseline order noise data.

[0058] After obtaining the baseline noise data, the noise data of the drive system under test at each order can be compared with the baseline noise data to obtain the NVH performance test results of the drive system under preset operating conditions. If the NVH performance test results of the drive system under preset operating conditions are normal, the drive system under test can be used as a sample drive system, and the baseline noise data can be readjusted. Through multiple adjustments, the baseline noise data can become increasingly accurate, thereby further improving the accuracy of NVH performance testing using the baseline noise data.

[0059] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below. In some embodiments, the NVH performance testing method of the drive system includes: Acquire noise data of the drive system under test at each order under preset operating conditions; The noise data of the drive system under test at each order are compared with the noise data of the reference order to obtain the NVH performance test results of the drive system under preset operating conditions.

[0060] The method for obtaining the baseline order noise data is as follows: Figure 5 As shown, it includes: S201, based on the maximum noise data of each drive system sample at any order under preset operating conditions, obtain the average noise value and noise standard deviation corresponding to that order. The drive system samples are identical in specifications to the drive system under test.

[0061] S202: Input the average noise value and noise standard deviation corresponding to each order into the operation model corresponding to the order type of that order to obtain the reference noise data of that order.

[0062] The order type is determined based on the type of the driving system under test. The order type includes principal order and non-principal order. The amplification factor of the operational model corresponding to the principal order is smaller than that of the non-principal order.

[0063] S203. Based on the reference noise data of each order, the initial order noise data is obtained.

[0064] S204: Compare the noise data of each vehicle equipped with different drive system samples under preset operating conditions with the initial order noise data to determine whether the NVH performance test results of each vehicle under preset operating conditions are normal; if so, proceed to S205; otherwise, proceed to S206.

[0065] S205, Based on the initial order noise data, obtain the reference order noise data. For example, the initial order noise data is determined as the reference order noise data.

[0066] S206, Remove drive system samples from vehicles with abnormal NVH performance test results, update all drive system samples, and return to S201.

[0067] The NVH performance testing device for the drive system provided in this application is described below. The NVH performance testing device for the drive system described below can be referred to in correspondence with the NVH performance testing method for the drive system described above.

[0068] In one embodiment, such as Figure 6 As shown, an NVH performance testing device for a drive system is provided, comprising: The data acquisition module 210 is used to acquire noise data of the drive system under test at each order under preset operating conditions; The performance testing module 220 is used to compare the noise data of the drive system under test at each order with the noise data of the reference order to obtain the NVH performance test results of the drive system under the preset operating conditions. The reference order noise data is determined based on the noise data of each order under the preset operating conditions from at least one qualified drive system sample, and the drive system sample has the same specifications as the drive system under test.

[0069] By acquiring noise data of the drive system under test at each order under preset operating conditions, and comparing this noise data with reference order noise data, the NVH performance test results of the drive system under preset operating conditions are obtained. The reference order noise data is determined based on the noise data of at least one qualified drive system sample with the same specifications as the drive system under test at each order under preset operating conditions. This comparison utilizes noise data strongly correlated with specific rotating components of the drive system to achieve NVH performance testing of the drive system, effectively suppressing misjudgments caused by the mutual cancellation or superposition of different order noises, thereby improving the accuracy of NVH performance testing of the drive system.

[0070] In one embodiment, the data acquisition module 210 is further configured to: The reference order noise data is determined based on the maximum noise data of each order of at least one drive system sample under the preset operating conditions.

[0071] In one embodiment, the data acquisition module 210 is specifically used for: Based on the maximum noise data of each drive system sample at any order under the preset operating conditions, the reference noise data of the order is obtained. The reference order noise data is obtained based on the reference noise data for each of the aforementioned orders.

[0072] In one embodiment, the data acquisition module 210 is specifically used for: Based on the maximum noise data of each drive system sample at any order under the preset operating conditions, the average noise value and noise standard deviation corresponding to the order are obtained. The baseline noise data for the specified order is obtained based on the average noise value and noise standard deviation corresponding to that order.

[0073] In one embodiment, the data acquisition module 210 is specifically used for: The target parameters obtained from the maximum noise data of any order under the preset operating conditions of each drive system sample are input into the operation model corresponding to the order type of the order to obtain the reference noise data of the order. The target parameter includes at least one of the average noise value or the noise standard deviation, and the order type is determined according to the type of the drive system under test. The order type includes major order and non-major order, and the amplification factor of the operation model corresponding to the major order is smaller than the amplification factor of the non-major order.

[0074] In one embodiment, the data acquisition module 210 is specifically used for: Based on the reference noise data of each order, the initial order noise data is obtained; The noise data of the vehicle equipped with the drive system sample under the preset operating conditions at each order are compared with the initial order noise data to obtain the NVH performance test results of the vehicle under the preset operating conditions. The NVH performance test results of each vehicle under the preset operating conditions are determined to be normal. Based on the initial order noise data, the reference order noise data is obtained.

[0075] In one embodiment, the data acquisition module 210 is further configured to: If the NVH performance test result of the vehicle under the preset working condition is determined to be abnormal, the drive system sample of the vehicle with the abnormal NVH performance test result is removed from each drive system sample to update each drive system sample; Based on the maximum noise data of each of the updated drive system samples at any order under the preset operating conditions, the reference noise data of the order is obtained, so as to update the initial order noise data according to the reference noise data of each order.

[0076] Figure 7 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 7 As shown, the electronic device may include: a processor 810, a communication interface 820, a memory 830, and a communication bus 840, wherein the processor 810, the communication interface 820, and the memory 830 communicate with each other via the communication bus 840. The processor 810 can call a computer program in the memory 830 to execute an NVH performance testing method for the drive system, such as including: Acquire noise data of the drive system under test at each order under preset operating conditions; The noise data of the drive system under test at each order are compared with the noise data of the reference order to obtain the NVH performance test results of the drive system under the preset operating conditions. The reference order noise data is determined based on the noise data of each order under the preset operating conditions from at least one qualified drive system sample, and the drive system sample has the same specifications as the drive system under test.

[0077] Furthermore, the logical instructions in the aforementioned memory 830 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0078] On the other hand, embodiments of this application also provide a storage medium, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the NVH performance detection method of the drive system provided in the above embodiments, for example including: Acquire noise data of the drive system under test at each order under preset operating conditions; The noise data of the drive system under test at each order are compared with the noise data of the reference order to obtain the NVH performance test results of the drive system under the preset operating conditions. The reference order noise data is determined based on the noise data of each order under the preset operating conditions from at least one qualified drive system sample, and the drive system sample has the same specifications as the drive system under test.

[0079] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0080] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A method of detecting NVH performance of a drive system, characterized by, The method comprises: obtaining noise data of each order of a to-be-tested driving system under a preset working condition; comparing the noise data of each order of the to-be-tested driving system with reference order noise data to obtain a NVH performance detection result of the driving system under the preset working condition; wherein the reference order noise data is determined according to noise data of each order of at least one qualified driving system sample under the preset working condition, and the driving system sample has the same specifications as the to-be-tested driving system.

2. The method of claim 1, wherein, The method further comprises: determining the reference order noise data according to maximum noise data of each order of at least one driving system sample under the preset working condition.

3. The method of claim 2, wherein, Determining the reference order noise data according to maximum noise data of each order of at least one driving system sample under the preset working condition comprises: obtaining reference noise data of each order according to maximum noise data of any order of each driving system sample under the preset working condition; obtaining the reference order noise data according to the reference noise data of each order.

4. The method of claim 3, wherein, Obtaining reference noise data of each order according to maximum noise data of any order of each driving system sample under the preset working condition comprises: obtaining an average noise value and a noise standard deviation corresponding to each order according to maximum noise data of any order of each driving system sample under the preset working condition; obtaining reference noise data of each order according to the average noise value and the noise standard deviation corresponding to the order.

5. The method of claim 3, wherein, Obtaining reference noise data of each order according to maximum noise data of any order of each driving system sample under the preset working condition comprises: inputting a target parameter obtained according to maximum noise data of any order of each driving system sample under the preset working condition into an operation model corresponding to an order type of the order to obtain reference noise data of the order; wherein the target parameter comprises at least one of an average noise value or a noise standard deviation, and the order type of the order is determined according to a type of the to-be-tested driving system; the order type comprises a main order and a non-main order, and an amplification coefficient of the operation model corresponding to the main order is smaller than an amplification coefficient of the non-main order.

6. The method of claim 3, wherein, Obtaining the reference order noise data according to the reference noise data of each order comprises: obtaining initial order noise data according to the reference noise data of each order; comparing noise data of each order of a vehicle carrying the driving system sample under the preset working condition with the initial order noise data to obtain a NVH performance detection result of the vehicle under the preset working condition; determining that the NVH performance detection result of each vehicle under the preset working condition is normal, and obtaining the reference order noise data according to the initial order noise data.

7. The method of detecting the NVH performance of a drive system according to claim 6, characterized by, Further comprising: determining that the NVH performance detection result of the vehicle under the preset working condition is abnormal, and removing the driving system sample of the vehicle carrying the driving system sample with the abnormal NVH performance detection result from each driving system sample to update each driving system sample. According to the maximum noise data of each of the drive system samples in the preset working condition, reference noise data of each order is obtained, and the initial order noise data is updated according to the reference noise data of each order.

8. A device for detecting NVH performance of a drive system, characterized by, Comprise: a data acquisition module configured to acquire noise data of each order of a to-be-tested drive system in a preset working condition; a performance detection module configured to compare the noise data of each order of the to-be-tested drive system with reference order noise data, and obtain an NVH performance detection result of the drive system in the preset working condition; wherein the reference order noise data is determined according to noise data of each order of at least one qualified drive system sample in the preset working condition, and the drive system sample has the same specifications as the to-be-tested drive system.

9. An electronic device comprising a processor and a memory having a computer program stored therein, characterized in that, The processor executes the computer program to implement the NVH performance detection method of the drive system according to any one of claims 1 to 7.

10. A computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to implement the method according to any one of claims 1 to 7.

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