Method and device for acquiring order noise target of electric drive assembly rack

Abstract

The invention discloses an electric drive assembly rack order noise target obtaining method and device, and the method comprises the steps: obtaining a sound source signal around a target motor in a whole vehicle state, carrying out the transformation and slicing of the sound source signal, and obtaining the main order noise of the target motor; calculating a main-order load of the sound source according to the main-order noise and a noise transfer function; and determining the target of the sound pressure level order of the electric drive assembly rack according to the acquired transfer function from the sound source of the electric drive assembly rack to the target point in combination with the main order load. The target of the sound pressure level order of the electric drive assembly rack can be well set, and then customer complaints caused by motor howling noise are controlled.

Description

Technical Field

[0001] The present invention relates to the technical field of drive motor noise measurement, and in particular to a method and device for acquiring an order noise target of an electric drive assembly test bench. Background Art

[0002] Order noise refers to specific frequency noise that varies with motor speed and is typically related to the number of poles and slots in the motor. This noise is particularly noticeable during bench testing, requiring in-depth analysis of its generation mechanism and transmission path, and targeted optimization measures.

[0003] In the existing technology, when setting the order noise target of the electric drive assembly test bench, it is necessary to obtain it through benchmarking with competing products. However, it is generally difficult to obtain the control program of the competing electric drive assembly, and the competing motor cannot be run on the test bench. The motor test bench target (sound pressure level 1 meter away from the motor surface) is difficult to obtain.

[0004] Therefore, how to convert the near-field noise of the external motor into the 1m sound pressure level noise commonly used on the test bench is a technical problem that needs to be solved urgently. Summary of the Invention

[0005] The main purpose of the present invention is to provide a method and device for obtaining the order noise target of an electric drive assembly test bench, which can well set the sound pressure level order target of the electric drive assembly test bench, thereby controlling customer complaints caused by motor howling noise.

[0006] In a first aspect, the present application provides a method for acquiring an electric drive assembly test bench order noise target, wherein the method comprises the steps of:

[0007] Acquire the sound source signal around the target motor in the whole vehicle state, and transform and slice the sound source signal to obtain the main order noise of the target motor;

[0008] Calculating the main order load of the sound source according to the main order noise and the noise transfer function;

[0009] Based on the collected transfer function from the sound source of the electric drive assembly test bench to the target point and combined with the main order load, the target sound pressure level order of the electric drive assembly test bench is determined.

[0010] In combination with the first aspect above, as an optional implementation method, the sound source of the target motor in the whole vehicle state is discretized to obtain separate sound sources at different positions of the target motor;

[0011] Microphones are set around each of the individual sound sources as reference points, and the noise signal inside the vehicle during full throttle acceleration is collected using a test device, and the motor speed is recorded;

[0012] Performing Fourier transform on the time domain signal of the noise signal inside the vehicle to obtain a frequency domain noise signal;

[0013] The frequency domain noise signal is sliced ​​into orders according to the motor speed and the main order noise value is extracted to obtain the main order noise of the target motor.

[0014] In combination with the first aspect above, as an optional implementation, based on a sound source generator arranged at the sound source and a microphone arranged at a set reference point, the noise transfer function from each sound source to the set reference point is collected respectively;

[0015] According to the main order noise curve and noise transfer function, the main order load of the sound source is obtained by using the inverse sound source IQD calculation method.

[0016] In conjunction with the first aspect above, as an optional implementation, microphones are arranged at set distances from each surface of the electric drive assembly and set target points to collect transfer functions from sound sources on each surface of the electric drive assembly rig to the target points;

[0017] Multiply the main-order noise of each sound source by the transfer function from the sound source on each surface of the electric drive assembly test bench to the target point, and calculate the target sound pressure level order from each surface of the electric drive assembly test bench to the target point.

[0018] In conjunction with the first aspect above, as an optional implementation, the target sound pressure level order from the sound source point on each surface of the electric drive assembly to the target point is calculated according to the formula: TN = (Q1*(TN / Q1)+Q2*(TN / Q2)+......+QN*(TN / QN)), where TN is the set N target points and QN is the sound source point on the N surfaces of the motor;

[0019] Calculate the average value of the sound pressure level order target from the sound source point on each surface of the electric drive assembly to the target point, and determine the target sound pressure level order of the electric drive assembly test bench.

[0020] In a second aspect, the present application provides a device for acquiring an order noise target of an electric drive assembly test bench, the device comprising:

[0021] A processing module is used to obtain the sound source signal around the target motor in the whole vehicle state, and transform and slice the sound source signal to obtain the main order noise of the target motor;

[0022] A calculation module, configured to calculate a main-order load of a sound source based on the main-order noise and the noise transfer function;

[0023] An acquisition module is used to determine the target sound pressure level order of the electric drive assembly test bench based on the collected transfer function from the sound source of the electric drive assembly test bench to the target point and in combination with the main order load.

[0024] In conjunction with the second aspect above, as an optional implementation, the processing module is further configured to discretize the sound source of the target motor in the entire vehicle state, so as to obtain separate sound sources at different positions of the target motor;

[0025] Microphones are set around each of the individual sound sources as reference points, and the noise signal inside the vehicle during full throttle acceleration is collected using a test device, and the motor speed is recorded;

[0026] Performing Fourier transform on the time domain signal of the noise signal inside the vehicle to obtain a frequency domain noise signal;

[0027] The frequency domain noise signal is sliced ​​into orders according to the motor speed and the main order noise value is extracted to obtain the main order noise of the target motor.

[0028] In conjunction with the first aspect above, as an optional implementation, the calculation module is further configured to collect noise transfer functions from each sound source to the set reference point based on a sound source generator arranged at the sound source and a microphone arranged at a set reference point;

[0029] According to the main order noise curve and noise transfer function, the main order load of the sound source is obtained by using the inverse sound source IQD calculation method.

[0030] In conjunction with the first aspect above, as an optional implementation, the determination module is further configured to collect transfer functions from sound sources on each surface of the electric drive assembly rig to the target point based on microphones arranged at set distances from each surface of the electric drive assembly and set target points;

[0031] Multiply the main-order noise of each sound source by the transfer function from the sound source on each surface of the electric drive assembly test bench to the target point, and calculate the target sound pressure level order from each surface of the electric drive assembly test bench to the target point.

[0032] In conjunction with the first aspect above, as an optional implementation, the determination module is further configured to calculate a target sound pressure level order from a sound source point on each surface of the electric drive assembly to a target point according to the formula: TN = (Q1*(TN / Q1)+Q2*(TN / Q2)+......+QN*(TN / QN)), where TN represents the set N target points and QN represents the sound source points on the N surfaces of the motor;

[0033] Calculate the average value of the sound pressure level order target from the sound source point on each surface of the electric drive assembly to the target point, and determine the target sound pressure level order of the electric drive assembly test bench.

[0034] The present application provides a method and device for acquiring an order noise target for an electric drive assembly test bench, wherein the method includes the steps of: acquiring a sound source signal around a target motor in a complete vehicle state, and transforming and slicing the sound source signal to obtain the main order noise of the target motor; calculating the main order load of the sound source based on the main order noise and the noise transfer function; determining the target sound pressure level order of the electric drive assembly test bench based on the collected transfer function from the sound source of the electric drive assembly test bench to the target point, and combining the main order load. The present application can well set the target sound pressure level order of the electric drive assembly test bench, thereby controlling customer complaints caused by motor whistling noise.

[0035] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0037] Figure 1 This is a flow chart of a method for acquiring an order noise target of an electric drive assembly test bench provided in an embodiment of the present application;

[0038] Figure 2 This is a schematic diagram of a device for acquiring order noise targets for an electric drive assembly test bench provided in an embodiment of the present application;

[0039] Figure 3 This is a schematic diagram of a discrete sound source provided in an embodiment of the present application. DETAILED DESCRIPTION

[0040] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. In the following description, when referring to the drawings, like numbers in different figures represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present invention, as detailed in the appended claims.

[0041] Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. Some of the blocks shown in the drawings are functional entities that do not necessarily correspond to physically or logically separate entities.

[0042] The embodiments of the present application provide a method and device for obtaining an order noise target for an electric drive assembly test bench, which can effectively set the sound pressure level order target of the electric drive assembly test bench, thereby controlling customer complaints caused by motor howling noise.

[0043] To achieve the above technical effects, the general ideas of this application are as follows:

[0044] A method for acquiring an electric drive assembly test bench order noise target, the method comprising the steps of:

[0045] S101: Acquire a sound source signal around a target motor in a complete vehicle state, and transform and slice the sound source signal to obtain a main-order noise of the target motor.

[0046] S102: Calculating the main order load of the sound source according to the main order noise and the noise transfer function.

[0047] S103: Determine the target sound pressure level order of the electric drive assembly test bench based on the collected transfer function from the electric drive assembly test bench sound source to the target point and in combination with the main order load.

[0048] The embodiments of the present application are further described in detail below with reference to the accompanying drawings.

[0049] Reference Figure 1 , Figure 1 The figure shows a flow chart of a method for acquiring an electric drive assembly test bench order noise target provided by the present invention. Figure 1 As shown, the method includes the steps of:

[0050] Step S101: Acquire the sound source signal around the target motor in the whole vehicle state, and transform and slice the sound source signal to obtain the main order noise of the target motor.

[0051] Specifically, the target motor sound source in the whole vehicle state is discretized to obtain separate sound sources at different positions of the target motor;

[0052] Microphones are set around each of the individual sound sources as reference points, and the noise signal inside the vehicle during full throttle acceleration is collected using a test device, and the motor speed is recorded;

[0053] Performing Fourier transform on the time domain signal of the noise signal inside the vehicle to obtain a frequency domain noise signal;

[0054] The frequency domain noise signal is sliced ​​into orders according to the motor speed and the main order noise value is extracted to obtain the main order noise of the target motor.

[0055] For easier understanding, let's take an example to collect the near-field noise of the target motor vehicle: the motor sound source is discretized, with each surface treated as a separate sound source, designated Q1 to Q6, and the sound source positioned 10 cm from the center of the motor surface. At least two microphones are placed near each separate sound source as reference points. For example, the reference points for sound source Q1 are P11 to P1N (N ≥ 2). The test equipment collects signals from all microphones during full throttle acceleration, and the motor speed is recorded. The time domain signal of the in-vehicle noise signal is Fourier transformed to obtain the frequency domain noise signal. The frequency domain noise signal is sliced ​​according to the motor speed and the main order noise values ​​are extracted to obtain the main order noise curve (for example, the main order noise curve of an 8-pole, 48-slot motor has orders 8, 24, and 48). Order slicing refers to the process of decomposing the signal by multiples of the speed and extracting the relevant energy distribution within a specific frequency range through order analysis technology in the analysis of vibration or noise signals of rotating machinery.

[0056] Step S102: Calculate the main order load of the sound source according to the main order noise and the noise transfer function.

[0057] Specifically, based on a sound source generator arranged at the sound source and a microphone arranged at a set reference point, the noise transfer function from each sound source to the set reference point is collected respectively;

[0058] According to the main order noise curve and noise transfer function, the main order load of the sound source is obtained by using the inverse sound source IQD calculation method.

[0059] For easier understanding, let's take an example and collect the noise transfer function from each sound source Q to a reference point. The specific steps are: place a sound source generator at the sound source, place a microphone at the reference point, and measure the transfer function. Calculate the sound source Q load: Based on the IQD calculation principle, using the obtained main-order noise curves P1 to PN and the obtained noise transfer function P / Q, calculate the main-order load curves (i.e., main-order loads) for sound sources Q1 to Q6.

[0060] It's important to explain that inverse source determination (IQD) is a technique that infers sound source characteristics (such as location, intensity, and spectrum) by measuring sound field data (such as sound pressure and particle velocity). It falls under the category of acoustic inverse problems and is widely used in fields such as noise control, acoustic imaging, medical ultrasound, and environmental monitoring.

[0061] The following is a detailed analysis of IQD:

[0062] 1. Core Principles

[0063] IQD is based on the inverse solution of the wave equation. The propagation of an acoustic field in a medium follows the wave equation. While the forward problem is to predict the acoustic field distribution from a known sound source, the inverse problem is to infer the source characteristics from measured sound field values. Mathematically, this often involves solving an underdetermined or ill-conditioned linear system, requiring the use of regularization or optimization methods.

[0064] Mathematical model:

[0065] Aq=pwhere:

[0066] p is the sound pressure vector at the measurement point,

[0067] q is the sound source parameter vector to be determined,

[0068] A is the transfer matrix (generated by the sound field propagation model).

[0069] Step S103: Determine the target sound pressure level order of the electric drive assembly test bench based on the collected transfer function from the electric drive assembly test bench sound source to the target point and in combination with the main order load.

[0070] Specifically, based on microphones arranged at set distances from each surface of the electric drive assembly and set target points, the transfer function from the sound source on each surface of the electric drive assembly test bench to the target point is collected;

[0071] Multiply the main-order noise of each sound source by the transfer function from the sound source on each surface of the electric drive assembly test bench to the target point, and calculate the target sound pressure level order from each surface of the electric drive assembly test bench to the target point.

[0072] Specifically, according to the formula: TN = (Q1*(TN / Q1)+Q2*(TN / Q2)+......+QN*(TN / QN)), calculate the target sound pressure level order from the sound source point on each surface of the electric drive assembly to the target point, where TN is the set N target points and QN is the sound source point on the N surfaces of the motor;

[0073] Calculate the average value of the sound pressure level order target from the sound source point on each surface of the electric drive assembly to the target point, and determine the target sound pressure level order of the electric drive assembly test bench.

[0074] For easier understanding, let's take an example. 4. Collect the transfer function from the sound source on the electric drive assembly test bench to the target points T1 to TN (1 meter from the motor surface): Simulate the electric drive assembly test bench. The electric drive assembly can be replaced by a model, the same size as the real thing. Place microphones 1 meter from each surface of the electric drive assembly. Test the noise transfer function from the sound source point Q to the target point T on each surface of the motor near field. Calculate the motor order noise target: Multiply the main order noise curve of each sound source by the transfer function from the sound source to the target point T1 to TN (1 meter from the motor surface). This yields the target sound pressure level order for each target point 1 meter from the electric drive assembly test bench: T1 = (Q1*(T1 / Q1)+Q2*(T1 / Q2)+......+QN*(T1 / QN)). Calculate the average value line from T1 to TN, that is, the average value of the sound pressure level order targets from T1 to T6, and thus obtain the target sound pressure level at 1 meter from the motor test bench.

[0075] In summary, this application adopts the Inverse Qsources Determination (IQD) method to determine the near-field sound source of the motor in the whole vehicle state, and uses the transfer path idea to calculate and convert it into the electric drive assembly test bench order noise target. This method can well set the electric drive assembly test bench 1-meter sound pressure level order target, thereby controlling customer complaints caused by motor whistling noise and saving costs.

[0076] Reference Figure 2 , Figure 2 The figure shows a schematic diagram of an electric drive assembly test bench order noise target acquisition device provided by the present invention, as shown in FIG. Figure 2 As shown, the device includes:

[0077] Processing module 201 is used to obtain the sound source signal around the target motor in the whole vehicle state, and transform and slice the sound source signal to obtain the main order noise of the target motor.

[0078] Calculation module 202: used to calculate the main order load of the sound source based on the main order noise and the noise transfer function.

[0079] Acquisition module 203 is used to determine the target sound pressure level order of the electric drive assembly test bench based on the collected transfer function from the electric drive assembly test bench sound source to the target point and in combination with the main order load.

[0080] Furthermore, in a possible implementation manner, the processing module is further configured to discretize the sound source of the target motor in the entire vehicle state, so as to obtain separate sound sources at different positions of the target motor;

[0081] Microphones are set around each of the individual sound sources as reference points, and the noise signal inside the vehicle during full throttle acceleration is collected using a test device, and the motor speed is recorded;

[0082] Performing Fourier transform on the time domain signal of the noise signal inside the vehicle to obtain a frequency domain noise signal;

[0083] The frequency domain noise signal is sliced ​​into orders according to the motor speed and the main order noise value is extracted to obtain the main order noise of the target motor.

[0084] Furthermore, in a possible implementation, the calculation module is further configured to collect noise transfer functions from each sound source to the set reference point based on a sound source generator arranged at the sound source and a microphone arranged at a set reference point;

[0085] According to the main order noise curve and noise transfer function, the main order load of the sound source is obtained by using the inverse sound source IQD calculation method.

[0086] Furthermore, in one possible implementation, the determination module is further configured to collect transfer functions from sound sources on each surface of the electric drive assembly to the target point based on microphones arranged at set distances from each surface of the electric drive assembly and set target points;

[0087] Multiply the main-order noise of each sound source by the transfer function from the sound source on each surface of the electric drive assembly test bench to the target point, and calculate the target sound pressure level order from each surface of the electric drive assembly test bench to the target point.

[0088] Furthermore, in one possible implementation, the determination module is further configured to calculate a target sound pressure level order from a sound source point on each surface of the electric drive assembly to a target point according to the formula: TN = (Q1*(TN / Q1)+Q2*(TN / Q2)+......+QN*(TN / QN)), where TN represents the set N target points and QN represents the sound source points on the N surfaces of the motor;

[0089] Calculate the average value of the sound pressure level order target from the sound source point on each surface of the electric drive assembly to the target point, and determine the target sound pressure level order of the electric drive assembly test bench.

[0090] Based on the same inventive concept, an embodiment of the present application further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, all or part of the method steps of the above method are implemented.

[0091] The present application implements all or part of the processes in the above-mentioned method, and can also be completed by instructing related hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and when the computer program is executed by the processor, it can implement the steps of the above-mentioned various method embodiments. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device that can carry computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0092] Based on the same inventive concept, an embodiment of the present application also provides an electronic device, including a memory and a processor, wherein the memory stores a computer program running on the processor, and when the processor executes the computer program, all or part of the method steps in the above method are implemented.

[0093] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor. The processor is the control center of a computer device and connects various parts of the entire computer device using various interfaces and lines.

[0094] The memory can be used to store computer programs and / or modules. The processor implements various functions of the computer device by running or executing the computer programs and / or modules stored in the memory, and calling the data stored in the memory. The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system and at least one application required for a function (such as a sound playback function, an image playback function, etc.); in addition, the memory can include a high-speed random access memory and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage device.

[0095] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, servers, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage and optical storage, etc.) containing computer-usable program code.

[0096] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), servers and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0097] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0098] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0099] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A method for acquiring an electric drive assembly test bench order noise target, characterized in that: include: Acquire the sound source signal around the target motor in the whole vehicle state, and transform and slice the sound source signal to obtain the main order noise of the target motor; Calculating the main order load of the sound source according to the main order noise and the noise transfer function; Based on the collected transfer function from the sound source of the electric drive assembly test bench to the target point and combined with the main order load, the target sound pressure level order of the electric drive assembly test bench is determined.

2. The method according to claim 1, characterized in that The method of obtaining a sound source signal around a target motor in a complete vehicle state and performing transformation and slicing processing on the sound source signal to obtain the main-order noise of the target motor includes: Discretizing the target motor sound source in the whole vehicle state to obtain separate sound sources at different positions of the target motor; Microphones are set around each of the individual sound sources as reference points, and the noise signal inside the vehicle during full throttle acceleration is collected using a test device, and the motor speed is recorded; Performing Fourier transform on the time domain signal of the noise signal inside the vehicle to obtain a frequency domain noise signal; The frequency domain noise signal is sliced ​​into orders according to the motor speed and the main order noise value is extracted to obtain the main order noise of the target motor.

3. The method according to claim 1, characterized in that Calculating the main order load of the sound source according to the main order noise curve and the noise transfer function includes: Based on a sound source generator arranged at the sound source and a microphone arranged at a set reference point, the noise transfer function of each sound source to the set reference point is collected respectively; According to the main order noise curve and noise transfer function, the main order load of the sound source is obtained by using the inverse sound source IQD calculation method.

4. The method according to claim 1, wherein The step of determining the target sound pressure level order of the electric drive assembly test bench based on the collected transfer function from the electric drive assembly test bench sound source to the target point and in combination with the main order load includes: Based on the microphones arranged at set distances from each surface of the electric drive assembly and the set target points, the transfer function from the sound source on each surface of the electric drive assembly test bench to the target point is collected; Multiply the main-order noise of each sound source by the transfer function from the sound source on each surface of the electric drive assembly test bench to the target point, and calculate the target sound pressure level order from each surface of the electric drive assembly test bench to the target point.

5. The method according to claim 4, characterized in that The calculation of the sound pressure level order from each surface of the electric drive assembly test bench to the target point includes: According to the formula: TN = (Q1*(TN / Q1)+Q2*(TN / Q2)+......+QN*(TN / QN)), calculate the target sound pressure level order from the sound source point on each surface of the electric drive assembly to the target point, where TN is the set N target points and QN is the sound source point on the N surfaces of the motor; Calculate the average value of the sound pressure level order target from the sound source point on each surface of the electric drive assembly to the target point, and determine the target sound pressure level order of the electric drive assembly test bench.

6. An electric drive assembly test bench order noise target acquisition device, characterized in that: include: A processing module is used to obtain the sound source signal around the target motor in the whole vehicle state, and transform and slice the sound source signal to obtain the main order noise of the target motor; A calculation module, configured to calculate a main-order load of a sound source based on the main-order noise and the noise transfer function; An acquisition module is used to determine the target sound pressure level order of the electric drive assembly test bench based on the collected transfer function from the sound source of the electric drive assembly test bench to the target point and in combination with the main order load.

7. The device according to claim 6, characterized in that: The processing module is further configured to discretize the sound source of the target motor in the whole vehicle state, so as to obtain separate sound sources at different positions of the target motor; Microphones are set around each of the individual sound sources as reference points, and the noise signal inside the vehicle during full throttle acceleration is collected using a test device, and the motor speed is recorded; Performing Fourier transform on the time domain signal of the noise signal inside the vehicle to obtain a frequency domain noise signal; The frequency domain noise signal is sliced ​​into orders according to the motor speed and the main order noise value is extracted to obtain the main order noise of the target motor.

8. The device according to claim 6, characterized in that: The calculation module is further configured to collect noise transfer functions from each sound source to the set reference point based on a sound source generator arranged at the sound source and a microphone arranged at a set reference point; According to the main order noise curve and noise transfer function, the main order load of the sound source is obtained by using the inverse sound source IQD calculation method.

9. The device according to claim 6, characterized in that: The determination module is further configured to collect transfer functions from the sound sources on each surface of the electric drive assembly to the target points based on microphones arranged at set distances from each surface of the electric drive assembly and set target points; Multiply the main-order noise of each sound source by the transfer function from the sound source on each surface of the electric drive assembly test bench to the target point, and calculate the target sound pressure level order from each surface of the electric drive assembly test bench to the target point.

10. The device according to claim 9, characterized in that: The determination module is further configured to calculate the target sound pressure level order from the sound source points on each surface of the electric drive assembly to the target point according to the formula: TN = (Q1*(TN / Q1)+Q2*(TN / Q2)+......+QN*(TN / QN)), where TN is the set N target points and QN is the sound source points on the N surfaces of the motor; Calculate the average value of the sound pressure level order target from the sound source point on each surface of the electric drive assembly to the target point, and determine the target sound pressure level order of the electric drive assembly test bench.

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