Transmission system gear transmission error target definition method, system and device

Abstract

The invention relates to the technical field of automobile NVH (Noise Vibration and Harshness), and particularly discloses a transmission system gear transmission error target definition method, system and device. Setting an in-vehicle order noise target demand based on the vehicle initial data; defining an evaluation index of the in-vehicle gear order noise as a sound pressure level; and establishing a relation model between a gear transmission error and a sound pressure level, and calculating a transmission error target according to a difference value between an in-vehicle order noise target demand and vehicle initial data. According to the scheme, the transmission system gear transmission error target is calculated and formulated according to different in-vehicle gear order noise target requirements, and the in-vehicle gear order noise target is quantized and decomposed into the gear transmission error target, so that a designer is guided to design and optimize a vehicle in a targeted manner, the gear order noise problem is solved, and the vehicle gear transmission error target optimization efficiency is improved. Therefore, the noise of an automobile transmission system is reduced.

Description

Technical Field

[0001] The present invention relates to the field of automobile NVH technology, and in particular to a method, system and device for defining a transmission error target of a transmission system gear. Background Art

[0002] Gear order noise (gear whine) is one of the main noise problems in automobile transmission systems, which often causes complaints from users and seriously affects the sound quality in the car. There are many ways to improve the gear whine problem in the car, such as acoustically wrapping the reducer assembly, adding an acoustic package to the cab, reducing the transmission error of the gear, etc. Among them, reducing the transmission error of the gear is to solve the whine problem from the source.

[0003] Definition of gear transmission error: When the driving wheel rotates a certain angle, the difference between the actual rotation angle and the theoretical rotation angle of the driven wheel (unit: μrad), the expression is:

[0004]

[0005] In the formula, θ 1 is the actual rotation angle of the driving wheel, θ 2 is the actual rotation angle of the driven wheel; z 1 、z 2 Divided into the number of teeth on the driving wheel and the driven wheel.

[0006] For any existing vehicle, it is an important task for NVH engineers to quantify and decompose the gear order noise target into gear transmission error target to guide designers for targeted design and optimization.

[0007] Patent document 1 (CN 117407676 A) discloses a gear whine optimization method, which obtains the vibration noise signal of the gear and compares it with the target value. When the target is exceeded, the speed and torque are adjusted to optimize the gear whine, but the target setting of the gear order noise in the vehicle is not introduced.

[0008] Patent document 2 (CN 113916543 B) discloses a method for setting a target value of in-vehicle order noise based on background noise. By testing the neutral coasting condition of the test vehicle, the target setting value of the in-vehicle order noise is determined based on the background noise of the order noise itself, providing a target for the design and development of in-vehicle order noise. However, it does not mention how to decompose the target of the in-vehicle order noise into the gear transmission error target. Summary of the invention

[0009] In order to remedy the above-mentioned defects, the purpose of the present invention is to provide a transmission system gear transfer error target definition method, system and device for different in-vehicle gear order noise target requirements, and quantitatively decompose the in-vehicle gear order noise target into gear transfer error targets to guide designers to design and optimize vehicles in a targeted manner, thereby solving the gear order noise problem and reducing the noise of the automobile transmission system.

[0010] To achieve the above object, the present invention provides the following technical solutions:

[0011] In a first aspect, the present application provides a method for defining a transmission error target of a transmission system gear, the method comprising:

[0012] A method for defining a transmission error target of a transmission system gear, the method comprising:

[0013] Acquiring initial vehicle data, and setting a target requirement for in-vehicle order noise based on the initial vehicle data;

[0014] Define sound pressure levels based on target requirements for gear order noise inside the vehicle;

[0015] A relationship model between gear transmission error and sound pressure level is established, and the transmission error target is calculated based on the difference between the in-vehicle order noise target requirement and the vehicle initial data.

[0016] Optionally, the obtaining of the initial vehicle data includes: performing an acceleration condition interior noise test on the test vehicle to obtain interior noise data;

[0017] Gear order noise data is selected from the in-vehicle noise data to calculate the difference between the initial gear order noise and the total sound pressure level. Optionally, the difference between the initial gear order noise and the total sound pressure level is calculated by the following formula:

[0018] L 1 =L Pall -L P1

[0019] Among them, L 1 is the difference between the initial gear order noise and the total sound pressure level, L Pall is the total sound pressure level in the car, L P1 is the initial value of gear order noise.

[0020] Optionally, the setting of the in-vehicle order noise target requirement based on the initial vehicle data includes: taking the smaller the difference between the gear order noise and the total sound pressure level, the more obvious the gear order noise is; for models with the same transmission path but different sound quality positioning, setting the difference between the gear order noise and the total sound pressure level as the in-vehicle order noise target requirement:

[0021] L 2 =L Pall-L P2

[0022] Among them, L 2 is the difference between the gear order noise and the total sound pressure level, L Pall is the total sound pressure level in the car, L P2 The gear order noise in the vehicle is the target requirement.

[0023] Optionally, the definition of the sound pressure level based on the target requirement of the gear order noise in the vehicle includes:

[0024] By consulting the excitation source of known gear order noise, the excitation information of gear transmission error is obtained;

[0025] Based on the excitation information of the gear transmission error, the target demand for in-vehicle order noise is used as the evaluation index of in-vehicle gear order noise, and the evaluation index of in-vehicle gear order noise is defined as the sound pressure level, which is expressed as follows:

[0026]

[0027] Among them, L P is the sound pressure level, P is the actual sound pressure, P 0 is the reference sound pressure.

[0028] Optionally, the relationship model between the gear transmission error and the sound pressure level is established by the following formula:

[0029]

[0030] Where, TE is the transmission error of the gear; L P is the sound pressure level, TE 0 is the reference transfer error, which is 1μrad or μm, and H(f) is the frequency-dependent transfer function.

[0031] Optionally, the difference between the in-vehicle order noise target requirement and the vehicle initial data is calculated by the following formula:

[0032]

[0033] Optionally, the transmission error target TE 2 Determined by the following formula:

[0034]

[0035] Among them, TE 1 Gear transmission error value for the test vehicle.

[0036] In a second aspect, the present application provides a transmission system gear transmission error target definition system, the system comprising:

[0037] An acquisition module, used for acquiring initial vehicle data, and setting a target requirement for in-vehicle order noise based on the initial vehicle data;

[0038] A definition module for defining the sound pressure level based on the target requirements of the gear order noise inside the vehicle;

[0039] The calculation module is used to establish a relationship model between gear transmission error and sound pressure level, and calculate the transmission error target according to the difference between the in-vehicle order noise target requirement and the vehicle initial data.

[0040] In a third aspect, the present application further provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the method steps as described in any one of the first aspects.

[0041] The beneficial effects of the present invention are embodied in:

[0042] The present invention provides a transmission system gear transmission error target definition method, system and device, establishes an approximate mathematical relationship between the gear transmission error and the gear order noise inside the vehicle, and proposes an approximate expression for calculating the transmission error target and a derivation method thereof.

[0043] This invention proposes a method for setting a target for gear transmission error based on the gear order noise target requirement in the vehicle. It can set different gear order noise targets for different product sound quality positioning, and then derive the gear transmission error target, providing quantitative indicators for reducer gear designers, improving vehicle design and optimization efficiency, thereby improving the NVH performance and driving experience of the transmission.

[0044] The initial data involved in the present invention only needs to measure a set of vehicle interior noise and gear transmission error data, avoiding the complex transmission path problem of the whole vehicle. At the same time, under the premise of knowing different transmission errors, the order noise of the gears in the vehicle can be calculated and predicted. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0046] Figure 1 A flow chart of a method for defining a transmission error target of a transmission system gear provided by the present invention;

[0047] Figure 2 A schematic diagram showing the total sound pressure level in a vehicle and the gear order noise changing with the speed provided by the present invention;

[0048] Figure 3 A schematic structural diagram of a backpack battery frame optimization system based on a vehicle chassis provided by the present invention;

[0049] Figure 4 The present invention provides a schematic structural diagram of an electronic device. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0051] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.

[0052] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0053] It should also be noted that the term "includes", "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, so that a commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the commodity or device including the elements.

[0054] It should be particularly noted that any symbols and / or numbers in the specification that are not marked in the accompanying drawings are not drawing marks.

[0055] In view of the lack of existing target setting theories and methods, the embodiments of the present application provide a transmission gear transmission error target definition method, system and device, which belongs to the field of automotive NVH (noise, vibration, and harshness) technology. Specifically, it relates to a transmission gear transmission error target definition method based on the gear order noise target requirements in the vehicle, and in particular, it relates to a transmission gear transmission error target calculation and formulation method for different gear order noise targets in the vehicle.

[0056] This embodiment is mainly used in vehicle systems, and its core method includes three parts: obtaining initial data, setting the in-vehicle order noise target requirements and outputting the transfer error target. This solution can be applied to a terminal, a server, or a system including a terminal and a server, and is implemented through the interaction between the terminal and the server. The terminal can be, but is not limited to, various personal computers, laptops, smart phones, tablet computers, etc.

[0057] The present invention will be further described below in conjunction with the accompanying drawings and examples.

[0058] See also Figure 1 The embodiment of the present application relates to a transmission system gear transmission error target definition method, and specifically to a transmission system gear transmission error target definition method based on the gear order noise target requirement in a vehicle, comprising the following steps:

[0059] S101 acquires initial vehicle data, and sets a target requirement for in-vehicle order noise based on the initial vehicle data;

[0060] S102 defines the sound pressure level based on the target requirements for gear order noise in the vehicle;

[0061] S103 establishes a relationship model between gear transmission error and sound pressure level, and calculates the transmission error target according to the difference between the in-vehicle order noise target requirement and the vehicle initial data.

[0062] In the above step S101, the initial vehicle data includes: gear order noise data, vehicle interior noise data, the difference between gear order noise and total sound pressure level, gear transmission error, etc.

[0063] The method for obtaining the initial vehicle data includes: performing an acceleration condition in-vehicle noise test on the test vehicle to obtain in-vehicle noise data;

[0064] The gear order noise data is selected from the in-vehicle noise data, and the difference between the initial gear order noise and the total sound pressure level is calculated.

[0065] At the same time, the gear transmission error TE can be obtained by testing the transmission error of the drive axle main reducer gear. 1 Test results. In the above embodiment, the difference between the initial gear order noise and the total sound pressure level is calculated by the following formula:

[0066] L 1 =L Pall -L P1

[0067] Among them, L 1 is the difference between the initial gear order noise and the total sound pressure level, L Pall is the total sound pressure level in the car, L P1 is the initial value of gear order noise.

[0068] Furthermore, in step S101, the initial data of the vehicle is obtained, that is, the acceleration condition in-vehicle noise test is performed on the sample vehicle or the test vehicle, so as to obtain the in-vehicle noise data, and the data is processed to extract the gear order noise data, and the difference L between the gear order noise and the total sound pressure level is calculated. 1 ; and obtain the gear transmission error value TE of the sample vehicle 1 The transmission error here refers to the harmonic amplitude of the gear order after the peak-to-peak value of the transmission error is Fourier transformed. There are two ways to obtain the numerical value of the gear transmission error, one is to calculate it from the model, and the other is to measure it through experiments.

[0069] For example, a prototype vehicle is tested on the road and the in-vehicle noise data is measured. The smaller the difference between the gear order noise and the total sound pressure level, the more obvious the gear order noise is. The measured in-vehicle noise data is processed to obtain the difference between the gear order noise and the total sound pressure level L of the drive axle main reducer gear. 1 Equal to 3dB, the drive axle noise in the car is obvious. At the same time, the transmission error test of the drive axle main reducer gear is carried out, and the test result TE 1 Equal to 55μrad.

[0070] In step S102 of the above embodiment, setting the in-vehicle order noise target requirement based on the vehicle initial data includes: taking the smaller the difference between the gear order noise and the total sound pressure level, the more obvious the gear order noise is; for vehicles with the same transmission path but different sound quality positioning, setting the difference between the gear order noise and the total sound pressure level as the in-vehicle order noise target requirement:

[0071]

[0072] Among them, L 2 is the difference between the gear order noise and the total sound pressure level, is the total sound pressure level in the car, L P2 The gear order noise in the vehicle is the target requirement.

[0073] In step S102, the target requirement for the in-vehicle order noise is set. Usually, the target requirement for the in-vehicle order noise is the difference between the gear order noise and the total sound pressure level in the vehicle. 2 , L2 The smaller it is, the more obvious the gear order noise is heard in the car. According to different sound quality requirements, enter an L 2 Here, the influence of order noise change on the total sound pressure level is ignored, that is, the total sound pressure level in the car remains unchanged before and after the order noise changes. Figure 2 A schematic diagram showing the changes of the total sound pressure level and gear order noise in the car with the speed; wherein the dotted line represents the total sound pressure level and the solid line represents the gear order noise.

[0074] In one embodiment, in order to eliminate the order noise of the final reducer gear of the drive axle in the vehicle, different L values ​​can be set for vehicles with the same transmission path but different sound quality positioning. 2 The difference between the gear order noise and the total sound pressure level is L 2 Set to 10dB as the target demand input;

[0075] In the above embodiment, the definition of the sound pressure level based on the target requirement of the gear order noise in the vehicle includes:

[0076] By consulting the excitation source of known gear order noise, the excitation information of gear transmission error is obtained;

[0077] Based on the excitation information of the gear transmission error, the target demand for in-vehicle order noise is used as the evaluation index of in-vehicle gear order noise, and the evaluation index of in-vehicle gear order noise is defined as the sound pressure level, which is expressed as follows:

[0078]

[0079] Among them, L P is the sound pressure level, P is the actual sound pressure, P 0 is the reference sound pressure.

[0080] In the above embodiment, the relationship model between the gear transmission error and the sound pressure level is established by the following formula:

[0081]

[0082] Where, TE is the transmission error of the gear; L P is the sound pressure level, TE 0 is the reference transfer error, which takes a value of 1 μrad or μm, and H(f) is the frequency-dependent transfer function. This transfer function is related to the transfer path. In practical applications, H(f) can be estimated through experiments or simulations.

[0083] Based on the difference between the target demand for in-vehicle order noise and the initial data of the vehicle:

[0084]

[0085] In the above embodiment, the transmission error target TE2 It is obtained by establishing a mathematical relationship model between the gear transmission error and the gear order noise inside the vehicle.

[0086] The transmission error target TE is calculated through the mathematical relationship between the gear transmission error and the gear order noise inside the vehicle. 2 , as follows:

[0087]

[0088] Among them, TE 1 Gear transmission error value for the test vehicle.

[0089] Optionally, replace L in the above step 1 , L 2 and TE 1 Substituting the numerical value into the above formula, the transmission error target TE can be calculated. 2 =24.6μrad, and output the target to the drive axle main reduction gear design department. The drive axle main reduction gear design department can further calculate the transmission error target TE 2 The difference between the gear transmission error of the test vehicle is used to guide the optimal design of the gear system.

[0090] In one embodiment, the output transmission error target refers to the output transmission error target TE calculated by establishing a mathematical relationship between the gear transmission error and the gear order noise in the vehicle. 2 , the detailed process is as follows:

[0091] By consulting professional books, we know that as the excitation source of gear order noise, gear transmission error is a displacement excitation. The evaluation index of gear order noise in the car is the sound pressure level, and the expression of sound pressure level is:

[0092]

[0093] Among them, L P is the sound pressure level, P is the actual sound pressure, P 0 is the reference sound pressure;

[0094] The square of sound pressure has the concept of energy, and the square of transmission error also has the concept of energy. Therefore, in order to establish the connection between transmission error and sound pressure level, the following mathematical relationship must be satisfied:

[0095]

[0096] Among them, L P is the sound pressure level, TE is the transmission error of the gear, the unit is μrad or μm, TE 0 is the reference transfer error, which takes the value of 1μrad or μm, and H(f) is the frequency-dependent transfer function, which is only related to the transfer path.

[0097] By calculating the difference between the target demand and the basic data, the output transfer error target TE is calculated. 2 , the mathematical relationship is as follows:

[0098]

[0099] Substituting formula (2) and (3) into (4), we can obtain:

[0100]

[0101] The above embodiments can be further described in combination with actual application scenarios:

[0102] In the automotive industry, transmission noise is one of the key factors affecting product quality. Gear transmission error not only affects the NVH (noise, vibration, harshness) performance of the transmission, but is also directly related to the size of the gear order noise inside the vehicle. In practical applications, since the transmission error changes periodically during the gear meshing process, it stimulates the gear system to generate vibration and noise; especially when the harmonic amplitude of the transmission error corresponds to the gear order, it will significantly enhance the gear order noise inside the vehicle. Therefore, in order to reduce transmission noise and improve driving experience, technicians need to optimize the control of gear transmission error.

[0103] The basis for the control of gear transmission error comes from: First, according to different sound quality requirements and vehicle design goals, technicians will set a target demand for the difference between the gear order noise and the total sound pressure level; for example, the difference is required to be less than a certain value; this difference reflects the expected degree of reduction in the gear order noise in the vehicle. Secondly, by establishing a relationship model between the transmission error and the gear order noise in the vehicle, the output transmission error target is calculated based on the difference between the target demand for the in-vehicle order noise and the initial data of the vehicle. In this way, the target demand for the in-vehicle order noise can be decomposed into the gear transmission error target.

[0104] Therefore, the transmission error target output by the above-mentioned embodiment of the present invention can be used by technicians to optimize the design of the gear system based on the transmission error target and the difference between the transmission error target and the gear transmission error of the test vehicle, including adjusting the gear tooth shape, tooth direction, material selection, lubrication method, etc.; and can effectively control and reduce the gear transmission error, thereby improving the NVH performance and driving experience of the transmission.

[0105] It can be understood that, by effectively controlling and reducing the gear transmission error as described above and optimizing the design of the gear system, a gear system that meets the target requirements can be ultimately obtained.

[0106] For example, suppose there is a prototype vehicle whose initial vehicle data is as follows: the total sound pressure level is 70dB, and the initial gear order noise is 60dB; at this time, the difference between the gear order noise and the total sound pressure level of the initial data = 70dB-60dB = 10dB; the initial gear transmission error obtained by the test is assumed to be 55μrad.

[0107] If you want to reduce the gear order noise in the car, you need to reduce the difference between the gear order noise and the total sound pressure level. For example, set the target value of the difference between the gear order noise and the total sound pressure level to 5dB.

[0108] At this time, the target requirement for gear order noise is defined: Ignore the impact of order noise changes on the sound pressure level. If the sound pressure level remains unchanged at 70dB, the target gear order noise requirement is: 70dB-5dB=65dB.

[0109] In order to establish the relationship between transmission error and sound pressure level, the following relationship model must be satisfied:

[0110]

[0111] Among them, L P is the sound pressure level, TE is the transmission error of the gear, the unit is μrad or μm, TE 0 is the reference transfer error, which takes the value of 1μrad or μm, and H(f) is the frequency-dependent transfer function, which is only related to the transfer path.

[0112] Assuming the reference transfer error TE 0 = 1 μrad. Use the following expression to calculate the transfer error target: Substituting the values ​​into the equation, we get:

[0113]

[0114] For the method steps disclosed in the above embodiments, the method steps are described as a series of action combinations for the purpose of simple description, but those skilled in the art should know that the embodiments of the present invention are not limited by the order of the actions described, because according to the embodiments of the present invention, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present invention.

[0115] Based on the same inventive concept, the embodiment of the present application also provides a transmission system gear transmission error target definition system for implementing the above-mentioned transmission system gear transmission error target definition method. The implementation scheme for solving the problem provided by the system is similar to the implementation scheme recorded in the above-mentioned method, so the specific limitations in one or more transmission system gear transmission error target definition system embodiments provided below can refer to the limitations of the above-mentioned transmission system gear transmission error target definition method, and will not be repeated here. It can be understood that the above description of its method is also applicable to the description of the system.

[0116] In one embodiment, a transmission system gear transmission error target definition system is also provided. The embodiments of the present invention are described below in conjunction with the accompanying drawings. Figure 3 As shown, the system specifically includes:

[0117] An acquisition module 210 is used to acquire initial vehicle data and set a target requirement for in-vehicle order noise based on the initial vehicle data;

[0118] A definition module 220, for defining a sound pressure level based on a target requirement of gear order noise in a vehicle;

[0119] The calculation module 230 is used to establish a relationship model between the gear transmission error and the sound pressure level, and calculate the transmission error target according to the difference between the in-vehicle order noise target requirement and the vehicle initial data.

[0120] It is worth noting that although only some basic functional modules are disclosed in the embodiments of the present invention, it does not mean that the composition of the present system is limited to the above basic functional modules. On the contrary, what the present embodiment wants to express is that on the basis of the above basic functional modules, those skilled in the art can arbitrarily add one or more functional modules in combination with the prior art to form an infinite number of embodiments or technical solutions. In other words, the present system is open rather than closed. Just because the present embodiment only discloses individual basic functional modules, it cannot be considered that the protection scope of the claims of the present invention is limited to the disclosed basic functional modules. At the same time, for the convenience of description, the above devices are described in terms of functions and are described separately in various units and modules. Of course, when implementing the present invention, the functions of each unit and module can be implemented in the same or one or more software and / or hardware.

[0121] like Figure 4 As shown, the present invention also provides an electronic device, comprising: a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus; a computer program is stored in the memory, and when the computer program is executed by the processor, the processor executes the steps of a method for defining a transmission error target of gear order noise in a vehicle.

[0122] Figure 4 Schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. Figure 4 The electronic device provided in the embodiment of the present invention includes: one or more processors 310 and a storage device 320; the processor 310 in the electronic device may be one or more, Figure 3 A processor 310 is taken as an example; the storage device 320 is used to store one or more programs; the one or more programs are executed by the one or more processors 310, so that the one or more processors 310 implement the method for optimizing a backpack battery frame based on a vehicle chassis as described in any of the embodiments of the present invention.

[0123] The electronic device may further include: an input device 330 and an output device 340 .

[0124] The processor 310, storage device 320, input device 330 and output device 340 in the electronic device can be connected via a bus or other means. Figure 4 The example of connecting through bus is taken in the following.

[0125] The storage device 320 in the electronic device is a computer-readable storage medium that can be used to store one or more programs, which can be software programs, computer executable programs and modules, such as the program instructions / modules corresponding to the method for defining the transmission error target of the gear order noise in the vehicle provided in the embodiment of the present invention. The processor 310 executes various functional applications and data processing of the electronic device by running the software programs, instructions and modules stored in the storage device 320, that is, the method for optimizing the backpack battery frame based on the vehicle chassis in the above method embodiment is realized.

[0126] The storage device 320 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the electronic device, etc. In addition, the storage device 320 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some instances, the storage device 320 may further include a memory remotely arranged relative to the processor 310, and these remote memories may be connected to the device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0127] The input device 330 may be used to receive input digital or character information and generate key signal input related to user settings and function control of the electronic device. The output device 340 may include a display device such as a display screen.

[0128] The present invention also provides a computer-readable storage medium storing a computer program executable by an electronic device. When the computer program runs on the electronic device, the electronic device executes the steps of a method for defining a transmission system gear transmission error target.

[0129] Specifically, the computer storage medium of the embodiment of the present invention can adopt any combination of one or more computer-readable media. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples (non-exhaustive list) of computer-readable storage media include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present embodiment, the computer-readable storage medium can be any tangible medium containing or storing a program, which can be used by an instruction execution system, device or device or used in combination with it.

[0130] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for defining a transmission error target of a transmission gear, characterized in that: The method comprises: Acquiring initial vehicle data, and setting a target requirement for in-vehicle order noise based on the initial vehicle data; Define sound pressure levels based on target requirements for gear order noise inside the vehicle; A relationship model between gear transmission error and sound pressure level is established, and the transmission error target is calculated based on the difference between the in-vehicle order noise target requirement and the vehicle initial data.

2. The method according to claim 1, characterized in that The obtaining of the initial vehicle data comprises: performing an acceleration condition interior noise test on the test vehicle to obtain interior noise data; The gear order noise data is selected from the in-vehicle noise data, and the difference between the initial gear order noise and the total sound pressure level is calculated.

3. The method according to claim 2, characterized in that The difference between the initial gear order noise and the total sound pressure level is calculated by the following formula: Where L1 is the difference between the initial gear order noise and the total sound pressure level, is the total sound pressure level in the car, L P1 is the initial value of gear order noise.

4. The method according to claim 3, characterized in that The setting of the in-vehicle order noise target requirement based on the initial vehicle data includes: taking the smaller the difference between the gear order noise and the total sound pressure level, the more obvious the gear order noise is; for vehicles with the same transmission path but different sound quality positioning, setting the difference between the gear order noise and the total sound pressure level as the in-vehicle order noise target requirement: Where L2 is the difference between the gear order noise and the total sound pressure level, is the total sound pressure level in the car, L P2 The gear order noise in the vehicle is the target requirement.

5. The method according to claim 4, characterized in that The target requirement definition of the sound pressure level based on the gear order noise in the vehicle includes: By consulting the excitation source of known gear order noise, the excitation information of gear transmission error is obtained; Based on the excitation information of the gear transmission error, the target demand for in-vehicle order noise is used as the evaluation index of in-vehicle gear order noise, and the evaluation index of in-vehicle gear order noise is defined as the sound pressure level, which is expressed as follows: Among them, L P is the sound pressure level, P is the actual sound pressure, and P0 is the reference sound pressure.

6. The method according to claim 5, characterized in that The relationship model between gear transmission error and sound pressure level is established by the following formula: Where, TE is the transmission error of the gear; L P is the sound pressure level, TE0 is the reference transfer error, which is 1μrad or μm, and H(f) is the frequency-dependent transfer function.

7. The method according to claim 6, characterized in that The difference between the target requirement of the in-vehicle order noise and the initial data of the vehicle is calculated by the following formula:

8. The method according to claim 7, characterized in that The transmission error target TE2 is determined by the following formula: Among them, TE1 is the gear transmission error value of the test vehicle.

9. A transmission system gear transmission error target definition system, characterized in that: The system comprises: An acquisition module, used for acquiring initial vehicle data, and setting a target requirement for in-vehicle order noise based on the initial vehicle data; A definition module for defining the sound pressure level based on the target requirements of the gear order noise inside the vehicle; The calculation module is used to establish a relationship model between gear transmission error and sound pressure level, and calculate the transmission error target according to the difference between the in-vehicle order noise target requirement and the vehicle initial data.

10. An electronic device comprising a memory and a processor, characterized in that: A computer program is stored in the memory, and when the computer program is executed by the processor, the processor executes the method steps as claimed in any one of claims 1 to 8.

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