Vehicle NVH performance development method, device, equipment and medium

Abstract

The application discloses a vehicle NVH performance development method, device, equipment and medium, and belongs to the technical field of vehicles. The method comprises the following steps: acquiring excitation source data of a power assembly of a first target vehicle model and an NVH transfer function of a second target vehicle model, wherein the excitation source data comprises noise source data and / or vibration source data; determining in-vehicle NVH data of a to-be-developed vehicle model according to the excitation source data and the NVH transfer function; inputting the in-vehicle NVH data into a pre-built subjective evaluation test bench, and acquiring subjective scores of noise and / or vibration output by a user based on the subjective evaluation test bench; and if the subjective scores are greater than or equal to a preset score threshold, taking the NVH transfer function as a development target to develop the NVH performance of the to-be-developed vehicle model. The method makes the NVH performance of a real vehicle of the to-be-developed vehicle model meet the requirements, and improves development quality and efficiency.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a method, apparatus, equipment and medium for developing vehicle NVH performance. Background Technology

[0002] NVH (Noise, Vibration, Harshness) performance mainly refers to the noise, vibration, and acoustic roughness generated by a vehicle during operation, which is an important indicator for measuring vehicle comfort. NVH performance research covers vibration isolation of the automotive powertrain mounting system and research on engine intake and exhaust noise, improving ride comfort by improving the vibration conditions of the excitation source or controlling the transmission of vibration and noise.

[0003] Currently, when developing NVH performance, competitor vehicle NVH performance data is often directly used as the development target for the vehicle under development, aiming to achieve the same NVH performance as the competitors. However, the vehicle under development differs from competitors in structural design, such as the powertrain. Using competitor vehicle NVH performance data as the development target often results in the actual vehicle's NVH performance failing to meet requirements after production. Summary of the Invention

[0004] In view of the above problems, this invention is proposed to provide a vehicle NVH performance development method, apparatus, equipment and medium to solve the above problems. It will subjectively evaluate the NVH performance data of competing models or benchmark models. Only when the subjective evaluation is qualified can the NVH performance of the vehicle to be developed be developed according to the NVH performance data of competing models or benchmark models, so that the NVH performance of the actual vehicle to be developed meets the requirements, thereby improving the development quality and efficiency.

[0005] In a first aspect, the present invention provides a method for developing vehicle NVH performance, the method comprising:

[0006] The excitation source data of the powertrain of the first target vehicle and the NVH transfer function of the second target vehicle are obtained. The powertrain of the first target vehicle is the same as that of the vehicle to be developed. The second target vehicle is a competitor vehicle or a benchmark vehicle. The excitation source data includes noise source data and / or vibration source data.

[0007] Based on the excitation source data and the NVH transfer function, the in-vehicle NVH data of the vehicle model to be developed are determined;

[0008] The in-vehicle NVH data is input into a pre-built subjective evaluation test bench, and the user's subjective score of noise and / or vibration based on the output of the subjective evaluation test bench is obtained.

[0009] If the subjective score is greater than or equal to the preset score threshold, then the NVH transfer function will be used as the development target to develop the NVH performance of the vehicle to be developed.

[0010] Optionally, based on the excitation source data and the NVH transfer function, the in-vehicle NVH data of the vehicle to be developed are determined, including:

[0011] If the excitation source data includes near-field noise and suspension point output force, and the NVH transfer function includes air transfer function and noise transfer function, then the in-vehicle noise data in the in-vehicle NVH data of the vehicle to be developed is determined based on the near-field noise, the air transfer function, the suspension point output force, and the noise transfer function.

[0012] Optionally, based on the near-field noise, the air transfer function, the suspension point output force, and the noise transfer function, the in-vehicle noise data in the in-vehicle NVH data of the vehicle to be developed is determined, including:

[0013] The in-vehicle noise data is determined according to the following formula:

[0014]

[0015] Where, N 噪 N represents the in-vehicle noise data. 近 G represents the near-field noise. 空 Let F represent the air transfer function. i G represents the output force at the i-th suspension point. 噪 Let n represent the noise transfer function, and n represent the number of suspension points.

[0016] Optionally, determining the in-vehicle NVH data of the vehicle to be developed based on the excitation source data and the NVH transfer function includes:

[0017] If the excitation source data includes suspension vibration data and the NVH transfer function includes a vibration transfer function, then the in-vehicle vibration data of the vehicle model to be developed is determined based on the suspension vibration data and the vibration transfer function.

[0018] Optionally, determining the in-vehicle vibration data from the in-vehicle NVH data of the vehicle model to be developed based on the suspension vibration data and the vibration transfer function includes:

[0019] The in-vehicle vibration data are determined according to the following formula:

[0020]

[0021] Where, N 振N represents the in-vehicle vibration data. 悬i G represents the i-th suspension vibration data. 振 Let n represent the vibration transfer function, and n represent the number of suspension points.

[0022] Optionally, after obtaining the user's subjective rating, the method further includes:

[0023] If the subjective score is less than the scoring threshold, the NVH transfer function is corrected, and the process returns to the step of determining the in-vehicle NVH data of the vehicle to be developed based on the excitation source data and the NVH transfer function, until the subjective score is greater than or equal to the scoring threshold.

[0024] Secondly, the present invention provides a vehicle NVH performance development apparatus, the apparatus comprising:

[0025] The acquisition module is used to acquire the excitation source data of the powertrain of the first target vehicle and the NVH transfer function of the second target vehicle. The powertrain of the first target vehicle is the same as the powertrain of the vehicle to be developed. The second target vehicle is a competitor vehicle or a benchmark vehicle. The excitation source data includes noise source data and / or vibration source data.

[0026] The determination module is used to determine the in-vehicle NVH data of the vehicle model to be developed based on the excitation source data and the NVH transfer function.

[0027] The input module is used to input the in-vehicle NVH data into a pre-built subjective evaluation test bench and obtain the user's subjective score of noise and / or vibration based on the output of the subjective evaluation test bench.

[0028] The development module is used to develop the NVH performance of the vehicle under development by taking the NVH transfer function as the development target if the subjective score is greater than or equal to a preset score threshold.

[0029] Optionally, the device also includes:

[0030] The correction module is used to correct the NVH transfer function if the subjective score is less than the score threshold, until the subjective score is greater than or equal to the score threshold.

[0031] Optionally, the determination module includes:

[0032] The first determining unit is configured to determine the in-vehicle noise data in the in-vehicle NVH data of the vehicle model to be developed based on the near-field noise, the air transfer function, the suspension point output force, and the noise transfer function if the excitation source data includes near-field noise and suspension point output force, and the NVH transfer function includes air transfer function and noise transfer function.

[0033] Optionally, the first determining unit is also used for:

[0034] The in-vehicle noise data is determined according to the following formula:

[0035]

[0036] Where, N 噪 N represents the in-vehicle noise data. 近 G represents the near-field noise. 空 Let F represent the air transfer function. i G represents the output force at the i-th suspension point. 噪 Let n represent the noise transfer function, and n represent the number of suspension points.

[0037] Optionally, the determination module includes:

[0038] The second determining unit is used to determine the in-vehicle vibration data in the in-vehicle NVH data of the vehicle model to be developed based on the suspension vibration data and the vibration transfer function if the excitation source data includes suspension vibration data and the NVH transfer function includes a vibration transfer function.

[0039] Optionally, the second determining unit is also used for:

[0040] The in-vehicle vibration data are determined according to the following formula:

[0041]

[0042] Where, N 振 N represents the in-vehicle vibration data. 悬i G represents the i-th suspension vibration data. 振 Let n represent the vibration transfer function, and n represent the number of suspension points.

[0043] Thirdly, the present invention provides an electronic device comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the computer instructions to perform the method as described in the first aspect.

[0044] Fourthly, the present invention provides a computer-readable storage medium storing computer instructions for causing the computer to perform the method as described in the first aspect.

[0045] The technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0046] This invention provides a method, apparatus, device, and medium for developing vehicle NVH performance. It acquires excitation source data of the powertrain of a first target vehicle and the NVH transfer function of a second target vehicle. The powertrain of the first target vehicle is identical to that of the vehicle under development. The second target vehicle is a competitor or benchmark vehicle. The excitation source data includes noise source data and / or vibration source data. First, mathematical expressions for the excitation sources of noise or vibration and the transmission paths of the noise or vibration in the vehicle under development are obtained. Based on the excitation source data and the NVH transfer function, the in-vehicle NVH data of the vehicle under development is determined, and the performance of the vehicle under development is predicted under the current excitation sources and transmission paths. Potential NVH performance issues; input in-vehicle NVH data into a pre-built subjective evaluation test bench, and obtain subjective scores from users based on the noise and / or vibration output of the test bench. The subjective scores express the intuitive feeling that the noise or vibration that may be generated in the vehicle under development will bring to the user. If the subjective score is greater than or equal to the preset score threshold, the NVH transfer function is used as the development target to develop the NVH performance of the vehicle under development. When the user is relatively satisfied, the NVH transfer function of the competitor's model or benchmark model is used to develop the NVH performance of the vehicle under development, so that the NVH performance of the actual vehicle under development meets the requirements, thereby improving the development quality and efficiency.

[0047] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0048] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0049] Figure 1 This is a flowchart of a vehicle NVH performance development method provided by an embodiment of the present invention;

[0050] Figure 2 This is a structural block diagram of a vehicle NVH performance development device provided in an embodiment of the present invention. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0052] Figure 1This is a flowchart of a vehicle NVH performance development method provided by an embodiment of the present invention, such as... Figure 1 As shown, the method includes:

[0053] Step S110: Obtain the excitation source data of the powertrain of the first target vehicle and the NVH transfer function of the second target vehicle.

[0054] The first target model has the same powertrain as the model to be developed, while the second target model is a competitor model or a benchmark model.

[0055] In this embodiment, there are three main sources of in-vehicle noise: powertrain noise, tire noise, and wind noise. Powertrain noise includes engine noise, transmission noise, driveshaft noise, intake noise, exhaust noise, HVAC noise, and fan noise. Powertrain noise is the primary source of in-vehicle noise during idling, low speeds, and acceleration. Powertrain vibration is also the main source of in-vehicle vibration.

[0056] In this embodiment, since the actual vehicle of the model to be developed may not have been produced yet, the excitation source data of the powertrains of other models equipped with the same powertrain can be used as the excitation source data of the powertrain of the model to be developed. In order to make the NVH performance of the model to be developed on par with, or even exceed, that of competing or benchmark models, the NVH transfer functions of competing or benchmark models can be used as a reference when developing the NVH transfer function of the model to be developed.

[0057] In this embodiment, the excitation source data includes excitation source data under various operating conditions, and the NVH transfer function includes NVH transfer functions under various operating conditions. The excitation source data includes noise source data and / or vibration source data; the NVH transfer function is a function relating the noise and vibration sources of the powertrain to the ear-level noise and seat vibration in the cockpit, and may include an air transfer function, a noise transfer function, or a vibration transfer function. Operating conditions include rapid acceleration, acceleration, idling, and deceleration.

[0058] Step S120: Determine the in-vehicle NVH data of the vehicle model to be developed based on the excitation source data and the NVH transfer function.

[0059] In this embodiment, obtaining the excitation source data means obtaining the source of vibration or noise, and obtaining the NVH transfer function is equivalent to obtaining the transmission path of vibration or noise. Therefore, the in-vehicle NVH data of the vehicle to be developed, i.e., the noise or vibration data inside the vehicle, can be determined.

[0060] Optionally, step S120 includes steps S1201 and S1202.

[0061] Step S1201: If the excitation source data includes near-field noise and suspension point output force, and the NVH transfer function includes air transfer function and noise transfer function, then determine the in-vehicle noise data in the in-vehicle NVH data of the vehicle to be developed based on the near-field noise, air transfer function, suspension point output force and noise transfer function.

[0062] In this embodiment, near-field noise refers to noise near the powertrain, i.e., the noise source that generates noise inside the vehicle; the mounting point is the connection point between the powertrain and the vehicle body, and the mounting point output force is the force output by the powertrain to the vehicle body through the mounting point. The transfer function is the ratio of the Laplace transform (or z-transform) of the response (i.e., output) of a linear system under zero initial conditions to the Laplace transform of the excitation (i.e., input). The air transfer function is the mathematical expression for the relationship between the sound pressure at the sound source (i.e., input) and the sound pressure at the driver's ear after propagation through the air (i.e., output). The noise transfer function is the mathematical expression for the relationship between the sound pressure at the driver's ear and the unit load at the excitation point under a unit force.

[0063] Therefore, near-field noise and suspension point output force are equivalent to the input of the excitation point, and air transfer function and noise transfer function are equivalent to mathematical expressions. So, based on them, we can obtain the noise data inside the vehicle, i.e. the output, and then use this noise data inside the vehicle as the noise data inside the vehicle model to be developed.

[0064] Optionally, step S1201 includes:

[0065] The in-vehicle noise data is determined using the following formula:

[0066]

[0067] Where, N 噪 N represents in-vehicle noise data. 近 G represents near-field noise. 空 F represents the air transfer function. i G represents the output force at the i-th suspension point. 噪 Let n represent the noise transfer function, and n represent the number of suspension points.

[0068] In this embodiment, N 近 *G 空 What is obtained is the near-field noise that travels through the air to the driver's ears. What we get is the sum of the noise transmitted from each suspension point to the driver's ear through the vehicle body. Adding the two together gives us the total noise at the driver's ear, which is the in-vehicle noise data.

[0069] Step S1202: If the excitation source data includes suspension vibration data and the NVH transfer function includes vibration transfer function, then determine the in-vehicle vibration data in the in-vehicle NVH data of the vehicle to be developed based on the suspension vibration data and the vibration transfer function.

[0070] In this embodiment, the suspension vibration data may include the vibration magnitude or vibration acceleration at the suspension point. The vibration transfer function is a mathematical expression relating the vibration at the suspension point to the vibration at the vehicle seat. Therefore, based on the vibration data at the suspension point and the vibration transfer function, the vibration data at the vehicle seat can be determined.

[0071] Optionally, step S1202 includes:

[0072] The vibration data inside the vehicle is determined using the following formula:

[0073]

[0074] Where, N 振 This represents the vibration data inside the vehicle, N. 悬i G represents the i-th suspension vibration data. 振 Let n represent the vibration transfer function, and n represent the number of suspension points.

[0075] In this embodiment, N 悬i *G 振 The vibration transmitted from the i-th suspension point to the seat is obtained by adding up the vibrations transmitted from all suspension points to the seat.

[0076] Step S130: Input the in-vehicle NVH data into the pre-built subjective evaluation test bench and obtain the user's subjective score of noise and / or vibration based on the output of the subjective evaluation test bench.

[0077] In this embodiment, a subjective evaluation test bench can be pre-constructed. The subjective evaluation test bench may include a microphone and a vibrating seat. The microphone plays in-vehicle noise data to simulate in-vehicle noise conditions. The vibrating seat is controlled to vibrate according to the in-vehicle vibration data to simulate the vibration of the seat in the vehicle. Then, the user sits on the vibrating seat with the microphone placed next to the user's ear, allowing the user to evaluate the vibration and noise they feel. The evaluation can use a 10-point scoring system.

[0078] It should be noted that in this embodiment, if a noise subjective evaluation test is conducted alone, the vibrating seat is controlled to remain still, and the user only provides a subjective evaluation of the noise level. If a vibration subjective evaluation test is conducted alone, the microphone does not play sound, and only the vibrating seat is controlled to vibrate, allowing the user to provide a subjective evaluation of the vibration level. Of course, noise and vibration tests can be conducted simultaneously, depending on the specific needs.

[0079] Step S140: If the subjective score is greater than or equal to the preset score threshold, the NVH transfer function is used as the development target to develop the NVH performance of the vehicle to be developed.

[0080] In this embodiment, if the subjective score is greater than or equal to the preset score threshold, it indicates that the subjective evaluation is relatively satisfactory. The vehicle to be developed will then be developed according to the current powertrain and NVH transfer function, so that the NVH performance of the actual vehicle meets the user requirements.

[0081] Optionally, after step S130, the method further includes step S150.

[0082] Step S150: If the subjective score is less than the scoring threshold, then the NVH transfer function is corrected, and the process returns to the step of determining the in-vehicle NVH data of the vehicle to be developed based on the excitation source data and the NVH transfer function, until the subjective score is greater than or equal to the scoring threshold.

[0083] In this embodiment, if the subjective score is less than the scoring threshold, it indicates that the subjective evaluation is unsatisfactory, and the noise and vibration inside the vehicle to be developed may be relatively high, resulting in a poor user experience. Therefore, the NVH transfer function of competing or benchmark models cannot be used to develop the NVH performance of the vehicle to be developed. Instead, the NVH transfer function needs to be corrected. Specifically, the in-vehicle noise or vibration data can be analyzed, converted into curves, and then the frequencies in the curves can be analyzed to determine the frequency points that need adjustment, thereby correcting the NVH transfer function. After correction, the subjective evaluation test is repeated until the subjective score is greater than or equal to the scoring threshold.

[0084] Among these steps, after correcting the NVH transfer function, the vehicle body structure will be optimized, the engine and transmission system design will be improved, and more efficient sound insulation materials will be used to enhance the NVH performance of the vehicle under development.

[0085] In this embodiment, the subjective evaluation method for vehicle NVH performance development provides an intuitive assessment of the in-vehicle noise and vibration of the vehicle to be developed. It also allows for contingency plans to be prepared before the vehicle is developed. By modifying the NVH transfer function, the subjective evaluation is made to meet the target standard, and the modified NVH transfer function is determined as the development target. The development target is then further broken down and incorporated into the development process.

[0086] Based on the same inventive concept, this invention also provides a vehicle NVH performance development device. Figure 2 This is a structural block diagram of a vehicle NVH performance development device provided in an embodiment of the present invention, as shown below. Figure 2As shown, the device 200 includes an acquisition module 201, a determination module 202, an input module 203, and a development module 204.

[0087] The acquisition module 201 is used to acquire the excitation source data of the powertrain of the first target vehicle and the NVH transfer function of the second target vehicle. The powertrain of the first target vehicle is the same as the powertrain of the vehicle to be developed. The second target vehicle is a competitor vehicle or a benchmark vehicle. The excitation source data includes noise source data and / or vibration source data.

[0088] The determination module 202 is used to determine the in-vehicle NVH data of the vehicle to be developed based on the excitation source data and the NVH transfer function;

[0089] The input module 203 is used to input in-vehicle NVH data into a pre-built subjective evaluation test bench and obtain the user's subjective score of noise and / or vibration based on the output of the subjective evaluation test bench.

[0090] The development module 204 is used to develop the NVH performance of the vehicle under development by taking the NVH transfer function as the development target if the subjective score is greater than or equal to the preset score threshold.

[0091] Optionally, the determining module 202 includes:

[0092] The first determining unit is used to determine the in-vehicle noise data in the in-vehicle NVH data of the vehicle to be developed based on the near-field noise, air transfer function, suspension point output force and noise transfer function if the excitation source data includes near-field noise and suspension point output force, and the NVH transfer function includes air transfer function and noise transfer function.

[0093] Optionally, the first determining unit is also used for:

[0094] The in-vehicle noise data is determined using the following formula:

[0095]

[0096] Where, N 噪 N represents the in-vehicle noise data. 近 G represents near-field noise. 空 F represents the air transfer function. i G represents the output force at the i-th suspension point. 噪 Let n represent the noise transfer function, and n represent the number of suspension points.

[0097] Optionally, the determining module 202 further includes:

[0098] The second determining unit is used to determine the in-vehicle vibration data in the in-vehicle NVH data of the vehicle model to be developed based on the suspension vibration data and the vibration transfer function if the excitation source data includes suspension vibration data and the NVH transfer function includes vibration transfer function.

[0099] Optionally, the second determining unit is also used for:

[0100] The vibration data inside the vehicle is determined using the following formula:

[0101]

[0102] Where, N 振 This represents the vibration data inside the vehicle, N. 悬i G represents the i-th suspension vibration data. 振 Let n represent the vibration transfer function, and n represent the number of suspension points.

[0103] Optionally, the device 200 also includes:

[0104] The correction module is used to correct the NVH transfer function if the subjective score is less than the scoring threshold, until the subjective score is greater than or equal to the scoring threshold.

[0105] It is understood that the device provided in the above embodiments is only illustrated by the division of the above functional modules. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0106] This invention also provides an electronic device that may include a processor and a memory, wherein the processor and the memory may be interconnected via a bus or other means.

[0107] The processor may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application.

[0108] Memory may include mass storage for data or instructions. For example, and not limitingly, memory may include hard disk drives (HDDs), floppy disk drives, flash memory, optical disks, magneto-optical disks, magnetic tape, or Universal Serial Bus (USB) drives, or combinations of two or more of these. Where appropriate, memory may include removable or non-removable (or fixed) media. Where appropriate, memory may be internal or external to an electronic device. In a particular embodiment, memory may be non-volatile solid-state memory.

[0109] In one instance, the memory may be read-only memory (ROM). In one instance, the ROM may be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM), or flash memory, or a combination of two or more of these.

[0110] The processor reads and executes computer program instructions stored in memory to implement any of the vehicle NVH performance development methods in the above embodiments.

[0111] In one example, the electronic device may further include a communication interface and a bus. The processor, memory, and communication interface are connected via the bus to communicate with each other. The communication interface is primarily used to enable communication between the various modules, devices, units, and / or equipment in the embodiments of this application. Where appropriate, the bus may include one or more buses.

[0112] Furthermore, in conjunction with the vehicle NVH performance development methods in the above embodiments, this invention can be implemented using a computer-readable storage medium. This computer-readable storage medium stores computer program instructions; when these computer program instructions are executed by a processor, they implement any of the vehicle NVH performance development methods in the above embodiments.

[0113] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages:

[0114] This invention provides a method, apparatus, device, and medium for developing vehicle NVH performance. It acquires excitation source data of the powertrain of a first target vehicle and the NVH transfer function of a second target vehicle. The powertrain of the first target vehicle is identical to that of the vehicle under development. The second target vehicle is a competitor or benchmark vehicle. The excitation source data includes noise source data and / or vibration source data. First, mathematical expressions for the excitation sources of noise or vibration and the transmission paths of the noise or vibration in the vehicle under development are obtained. Based on the excitation source data and the NVH transfer function, the in-vehicle NVH data of the vehicle under development is determined, and the performance of the vehicle under development is predicted under the current excitation sources and transmission paths. Potential NVH performance issues; input in-vehicle NVH data into a pre-built subjective evaluation test bench, and obtain subjective scores from users based on the noise and / or vibration output of the test bench. The subjective scores express the intuitive feeling that the noise or vibration that may be generated in the vehicle under development will bring to the user. If the subjective score is greater than or equal to the preset score threshold, the NVH transfer function is used as the development target to develop the NVH performance of the vehicle under development. When the user is relatively satisfied, the NVH transfer function of the competitor's model or benchmark model is used to develop the NVH performance of the vehicle under development, so that the NVH performance of the actual vehicle under development meets the requirements, thereby improving the development quality and efficiency.

[0115] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0116] Similarly, it should be understood that, in order to simplify this disclosure and aid in understanding one or more of the various aspects of the invention, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, this method of disclosure should not be construed as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, inventive aspects lie in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into this detailed description, wherein each claim itself is a separate embodiment of the invention.

[0117] It should be noted that the above embodiments are illustrative of the invention and not restrictive, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claims. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The invention can be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

Claims

1. A method for developing vehicle NVH performance, characterized in that, The method includes: The excitation source data of the powertrain of the first target vehicle and the NVH transfer function of the second target vehicle are obtained. The powertrain of the first target vehicle is the same as that of the vehicle to be developed. The second target vehicle is a competitor vehicle or a benchmark vehicle. The excitation source data includes noise source data and / or vibration source data. The vehicle to be developed is a vehicle for which there is no actual vehicle. Based on the excitation source data and the NVH transfer function, the in-vehicle NVH data of the vehicle to be developed are determined; the in-vehicle NVH data includes in-vehicle noise data and / or in-vehicle vibration data. The in-vehicle NVH data is input into a pre-built subjective evaluation test bench, and the user's subjective score of noise and / or vibration based on the output of the subjective evaluation test bench is obtained; the subjective evaluation test bench includes a microphone and a vibrating seat, the microphone is used to play the in-vehicle noise data, and the vibrating seat is used to vibrate according to the in-vehicle vibration data; If the subjective score is greater than or equal to the preset score threshold, then the NVH transfer function will be used as the development target to develop the NVH performance of the vehicle to be developed. If the subjective score is less than the scoring threshold, the NVH transfer function is corrected, and the process returns to the step of determining the in-vehicle NVH data of the vehicle to be developed based on the excitation source data and the NVH transfer function, until the subjective score is greater than or equal to the scoring threshold. The modification of the NVH transfer function specifically includes: The in-vehicle noise data or in-vehicle vibration data are converted into curves. The frequencies in the curves are analyzed to determine the frequency points that need adjustment. The NVH transfer function is then corrected based on the frequency points that need adjustment.

2. The vehicle NVH performance development method according to claim 1, characterized in that, Based on the excitation source data and the NVH transfer function, the in-vehicle NVH data of the vehicle model to be developed are determined, including: If the excitation source data includes near-field noise and suspension point output force, and the NVH transfer function includes air transfer function and noise transfer function, then the in-vehicle noise data in the in-vehicle NVH data of the vehicle to be developed is determined based on the near-field noise, the air transfer function, the suspension point output force, and the noise transfer function.

3. The vehicle NVH performance development method according to claim 2, characterized in that, Based on the near-field noise, the air transfer function, the suspension point output force, and the noise transfer function, the in-vehicle noise data in the in-vehicle NVH data of the vehicle to be developed is determined, including: The in-vehicle noise data is determined according to the following formula: = * + ； in, This indicates the in-vehicle noise data. This refers to the near-field noise. This represents the air transfer function. This indicates the output force at the i-th suspension point. Let n represent the noise transfer function, and n represent the number of suspension points.

4. The vehicle NVH performance development method according to claim 1, characterized in that, The step of determining the in-vehicle NVH data of the vehicle model to be developed based on the excitation source data and the NVH transfer function includes: If the excitation source data includes suspension vibration data and the NVH transfer function includes a vibration transfer function, then the in-vehicle vibration data of the vehicle model to be developed is determined based on the suspension vibration data and the vibration transfer function.

5. The vehicle NVH performance development method according to claim 4, characterized in that, The step of determining the in-vehicle vibration data from the in-vehicle NVH data of the vehicle model to be developed based on the suspension vibration data and the vibration transfer function includes: The in-vehicle vibration data are determined according to the following formula: = ； in, This indicates the vibration data inside the vehicle. This represents the i-th suspension vibration data. Let n represent the vibration transfer function, and n represent the number of suspension points.

6. A vehicle NVH performance development device, characterized in that, The device includes: The acquisition module is used to acquire the excitation source data of the powertrain of the first target vehicle and the NVH transfer function of the second target vehicle. The powertrain of the first target vehicle is the same as that of the vehicle to be developed. The second target vehicle is a competitor vehicle or a benchmark vehicle. The excitation source data includes noise source data and / or vibration source data. The vehicle to be developed is a vehicle without a physical vehicle. The determination module is used to determine the in-vehicle NVH data of the vehicle model to be developed based on the excitation source data and the NVH transfer function; the in-vehicle NVH data includes in-vehicle noise data and / or in-vehicle vibration data; An input module is used to input the in-vehicle NVH data into a pre-built subjective evaluation test bench and obtain the user's subjective score of noise and / or vibration based on the output of the subjective evaluation test bench; the subjective evaluation test bench includes a microphone and a vibrating seat, the microphone is used to play the in-vehicle noise data, and the vibrating seat is used to vibrate according to the in-vehicle vibration data; The development module is used to develop the NVH performance of the vehicle under development by taking the NVH transfer function as the development target if the subjective score is greater than or equal to a preset score threshold. The correction module is used to correct the NVH transfer function if the subjective score is less than the score threshold, until the subjective score is greater than or equal to the score threshold; The modification of the NVH transfer function specifically includes: The in-vehicle noise data or in-vehicle vibration data are converted into curves. The frequencies in the curves are analyzed to determine the frequency points that need adjustment. The NVH transfer function is then corrected based on the frequency points that need adjustment.

7. An electronic device, characterized in that, include: A memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, the processor executing the computer instructions to perform the method of any one of claims 1-5.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing the computer to perform the method of any one of claims 1-5.

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