Vibration and noise test platform

Abstract

This application discloses a vibration and noise testing platform, comprising: a test bench; an adapter detachably mounted on the test bench, the adapter having a mounting portion for mounting the device under test (DUT) so that the DUT is mounted on the adapter at its actual mounting angle; a vibration source, the vibration output end of which acts on the test bench; and a vibration acceleration sensor for detecting the vibration acceleration at a corresponding position of the DUT. This application allows the DUT to be mounted on the adapter at its actual mounting angle, thereby simulating the actual working environment of the DUT and ensuring consistency with the DUT in a real vehicle during vibration and noise testing. When different DUTs need to be tested, it is not necessary to replace the entire vibration and noise testing platform; only the adapter matching the DUT needs to be mounted on the test bench, reducing testing costs.

Description

Technical Field

[0001] This application relates to the field of noise measurement technology, and more specifically, to a vibration and noise testing platform. Background Technology

[0002] Automakers typically use vibration and noise testing systems to measure the vibration and noise of electric drive systems, employing a combination of measurement points to test the sound pressure, sound intensity, and sound power parameters of the tested equipment (such as the electric drive system). During testing, the entire electric drive system is placed in an anechoic chamber. Vibration measurement points are arranged in the modal region of the electric drive system, while sound pressure measurement points are arranged around the electric drive system and directly above it, with a distance of 1 meter between the measurement points. Vibration and noise can be measured simultaneously while the motor is operating.

[0003] This vibration and noise testing system can simultaneously measure the vibration and noise data of the entire electric drive system, but it has strict requirements for the testing environment. The test sample must be placed in a soundproof room to avoid interference from other noise.

[0004] To reduce the requirements for the testing environment, existing technologies also employ vibration testing to assess noise levels. The principle is that noise is a result of vibration; when an object vibrates within its acoustic frequency range, the surrounding medium also vibrates accordingly, radiating sound outwards as sound waves. Sound wave radiation is essentially the process of energy transfer from mechanical vibration waves.

[0005] Existing vibration and noise testing platforms include a test bench and a vibration source. The device under test is fixed on the test bench, and the vibration source simulates the vibration environment, so that the device under test on the test bench is in a vibration state. Then, the vibration data of the device under test is measured by a vibration acceleration sensor, and the noise data under the vibration data is obtained by using a corresponding algorithm.

[0006] However, existing vibration and noise testing platforms can only test the same type of device under test. When different devices under test need to be tested, the corresponding vibration and noise testing platform needs to be replaced, resulting in high testing costs.

[0007] Therefore, how to reduce testing costs is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0008] In view of this, the purpose of this application is to provide a vibration and noise testing platform to reduce testing costs.

[0009] To achieve the above objectives, this application provides the following technical solution:

[0010] The first aspect of this application provides a vibration and noise testing platform, comprising:

[0011] Test bench;

[0012] The adapter is detachably mounted on the test bench, and the adapter is provided with a mounting part for mounting the device under test, so that the device under test is mounted on the adapter according to the actual mounting angle.

[0013] A vibration source, wherein the vibration output end of the vibration source acts on the test bench;

[0014] A vibration acceleration sensor is used to detect the vibration acceleration at a corresponding position of the device under test.

[0015] In one possible implementation, the adapter includes a main mounting side and a test mounting side, the main mounting side being fixed to the test bench, and the device under test being mounted on the test mounting side.

[0016] In one possible implementation, the plane on which the main body is mounted is parallel to the plane on which the test mounting side is mounted.

[0017] In one possible implementation, the plane containing the main body mounting side forms an acute angle with the plane containing the test mounting side.

[0018] In one possible implementation, the plane on which the main body is mounted is perpendicular to the plane on which the test mounting side is mounted.

[0019] In one possible implementation, a first mounting hole is provided on the mounting side of the main body, and a second mounting hole corresponding to the first mounting hole is provided on the test bench.

[0020] The test mounting side is provided with a third mounting hole for mounting the device under test.

[0021] In one possible implementation, the third mounting hole is an oblong hole.

[0022] In one possible implementation, the test bench includes:

[0023] Support legs for the platform;

[0024] A platform is mounted on top of the platform legs;

[0025] A platform support is provided at the bottom of the platform support leg, and the platform support is provided with a fourth mounting hole for fixing to the position to be fixed.

[0026] In one possible implementation, the vibration source is mounted on the underside of the platform via a vibration bracket.

[0027] In one possible implementation, the vibration source is one of an exciter, a vibration table, an actuator, and an electric drive system;

[0028] And / or,

[0029] The device under test is either the entire electric drive system or a component of the electric drive system;

[0030] And / or,

[0031] The test bench is equipped with a counterweight fixing part for installing counterweights to adjust the modal frequency of the test bench.

[0032] The vibration and noise testing platform provided in this application can simulate a vibration environment through a vibration source, causing the test bench to drive the adapter and the device under test (DUT) to vibrate. A vibration acceleration sensor detects the vibration acceleration at a corresponding position of the DUT, and the corresponding vibration noise can be calculated based on the vibration acceleration. This application includes an adapter on the test bench for mounting the DUT. Depending on the actual mounting angle of the DUT, a suitable adapter can be selected to mount the DUT at its actual angle, thus simulating the actual working environment of the DUT and ensuring consistency between the vibration and noise tests conducted by this vibration and noise testing platform and those conducted on a real vehicle. When different DUTs need to be tested, it is not necessary to replace the entire vibration and noise testing platform; only the adapter matching the DUT needs to be installed on the test bench, reducing testing costs. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of the vibration and noise testing platform disclosed in the embodiments of this application during testing;

[0035] Figure 2 This is a schematic diagram of the structure of the test bench disclosed in the embodiments of this application;

[0036] Figure 3 This is a schematic diagram of the structure of the vibration and noise testing platform disclosed in another embodiment of this application during testing;

[0037] Figure 4 This is a schematic diagram of the structure of the vibration and noise testing platform disclosed in another embodiment of this application during testing;

[0038] Figure 5 This is a schematic diagram of the structure of the adapter disclosed in the embodiments of this application;

[0039] Figure 6 This is a schematic diagram of the test bench with counterweights installed, as disclosed in the embodiments of this application;

[0040] Figure 7 The image shows a front view of the test bench with counterweights installed, as disclosed in the embodiments of this application.

[0041] The meanings of the various reference numerals in the figure are as follows:

[0042] 100 - Test bench; 110 - Bench support leg; 120 - Bench platform; 121 - Second mounting hole; 122 - Counterweight fixing part; 130 - Bench support; 131 - Reinforcing rib;

[0043] 200 - Adapter; 210 - Main body mounting side; 211 - First mounting hole; 220 - Test mounting side; 221 - Third mounting hole; 230 - Reinforcing rib;

[0044] 300 - Vibration source;

[0045] 400-Vibration Support;

[0046] 500 - Device under test;

[0047] 600 - counterweight. Detailed Implementation

[0048] This application discloses a vibration and noise testing platform to reduce testing costs.

[0049] Hereinafter, embodiments will be described with reference to the accompanying drawings. Furthermore, the embodiments shown below do not limit the scope of the application as described in the claims. Additionally, the complete composition represented in the embodiments below is not limited to what is necessary as the solution to the application described in the claims. It should be noted that, for ease of description, only the parts relevant to the application are shown in the drawings. Unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0050] like Figure 1 , Figure 2 and Figure 5 As shown in the figure, this application discloses a vibration and noise test platform, which includes a test bench 100, a connecting device 200, a vibration source 300, and a vibration acceleration sensor (not shown in the figure).

[0051] The test bench 100 is the main support device of the vibration and noise test platform, used to provide an installation foundation for other devices. The adapter 200 is detachably installed on the test bench 100, so that the adapter 200 can be replaced. The appropriate adapter 200 can be replaced according to the different devices under test 500.

[0052] The adapter 200 is provided with a mounting portion for mounting the device under test (DUT) 500, so that the DUT 500 is mounted on the adapter 200 at the actual mounting angle. The mounting portion on the adapter 200 should be designed according to the structure of the DUT 500 to be mounted. Typically, the DUT 500 has corresponding mounting holes, so the mounting portion can be a mounting hole corresponding to the corresponding mounting hole of the DUT 500, so that the DUT 500 can be fixed to the adapter 200 with fasteners.

[0053] The vehicle's electric drive system can be broken down into three main components: the controller, the transmission, and the motor. Vibration and noise originating from a specific component can be identified through real-vehicle testing or simulation analysis. This vibration and noise testing platform is then used to test the vibration and noise performance of that component. It should be noted that this vibration and noise testing platform can perform vibration and noise performance tests on the entire electric drive system or on a single component. That is, the device under test 500 can be either the entire electric drive system or a component of it; the specific choice depends on the actual situation.

[0054] The vibration output end of the vibration source 300 acts on the test bench 100. The vibration source 300 can use a general vibration source such as a vibration table, exciter, or actuator as the excitation; of course, a complete electric drive system can also be used, with the actual vibration noise of the electric drive system during normal operation as the excitation.

[0055] If a general vibration source is used as the vibration excitation, the excitation spectrum must be confirmed and selected based on measured or simulated vibration and noise data of the electric drive system. Excitation types may include:

[0056] Frequency sweep excitation was used to test the response of the device under test 500 under vibration and noise excitation at different frequencies. Through the test, the sensitivity of the device under test 500 to vibration and noise at different frequencies was determined.

[0057] Fixed-frequency excitation is used to test the response of the device under test 500 to vibration and noise at a specific frequency. It is suitable for determining the vibration and noise characteristics of the device under test 500 under a common operating condition (such as a constant speed straight-line driving state of 60km).

[0058] Random vibration excitation is used to fit real vehicle or simulation data to form random vibration PSD (power spectral density) spectral lines, which approximately defines the vibration noise response characteristics of the device under test 500 in the full frequency band under actual working conditions.

[0059] Time-domain vibration excitation uses the vibration time domain of the actual vehicle or simulation as input to clarify the vibration and noise response characteristics of the device under test 500 in the entire frequency band under actual working conditions.

[0060] Based on the measured vibration and noise data of the electric drive system during operation, or based on the simulation data of the electric drive system, the excitation type of the device under test 500 is selected, and then the vibration source 300 outputs according to the corresponding excitation type to simulate the actual working environment of the electric drive system.

[0061] A vibration acceleration sensor is used to detect the vibration acceleration at a corresponding position of the device under test 500, thereby obtaining the vibration noise of the device under test 500 in the actual working environment based on the measured vibration acceleration. The vibration noise test platform disclosed in this application embodiment can be applied to the effectiveness testing of vibration reduction devices.

[0062] This embodiment takes the application of a particle damper in the controller cover of an electric drive system as an example. The noise reduction effect of the particle damper on the controller cover can be verified through a vibration and noise test platform. The specific test process is as follows:

[0063] The vibration and noise of the electric drive system measured in the actual vehicle were mainly caused by the low modal frequency of the controller cover, which caused the vibration and noise energy to radiate outward. Therefore, the particle damper was used to change the modal frequency of the controller cover to achieve the effect of vibration reduction and noise reduction.

[0064] The controller cover is horizontally positioned under the vehicle or on the ground at the installation location of the electric drive system. Bolt holes are designed around the controller cover, and the controller box is bolted together.

[0065] The structural design of the test bench 100 and the adapter 200 allows the controller cover to be installed on the adapter 200 in a manner consistent with the actual vehicle. The adapter 200 and the test bench 100 can be bolted together, and the top surface of the adapter 200 can also be bolted to the controller cover.

[0066] The assembled test bench 100 and adapter 200 are subjected to modal simulation analysis using Abaqus simulation software. Based on the mode shape and response frequency, it is determined whether the vibration test will introduce vibration peaks from the test bench or adapter 200 to the controller cover plate, thereby determining the reliability of the vibration noise test platform.

[0067] Using a force hammer system, the modal parameters of the controller cover plate are identified using the single-mode identification method, and vibration measurement points are arranged according to the modal regions. The arrangement of vibration measurement points for the controller is determined by combining the order response frequency of individual modes and the modal regions, forming an overall measurement point arrangement scheme.

[0068] The test bench 100 can be bolted to the ground. The adapter 200 serves as a transmission medium, which can be fixed to the test bench 100 platform and fully fits the controller cover plate to be tested. By setting parameters, adjusting the vibration frequency range of the signal generator, and adjusting the vibration amplitude of the power amplifier through a computer, the vibration source 300 generates vibration, which is transmitted to the test bench 100 platform through the excitation rod, and then to the controller cover plate through the adapter 200.

[0069] By setting up a particle damper to test the vibration and obtaining the spectrum, observe the vibration spectrum. If the peak value of the measured point always meets other peak values ​​within the same frequency, it is a reinforcement point and the noise may decrease; otherwise, it is a depletion point and the noise may increase.

[0070] The vibration spectrum under no-load conditions was matched one-to-one with the vibration spectrum of the particle damper at each measurement point. The amplitude in the 20-2000Hz frequency band was observed. The greater the difference in amplitude, the more significant the noise reduction.

[0071] As shown in Table 1, the vibration reduction effect of the controller cover after applying the particle damper is disclosed. In the table, the no-load condition represents the controller cover without the particle damper, and the particle damper condition represents the controller cover with the particle damper.

[0072] Among the vibration amplitude differences at the six measuring points, the vibration reduction at measuring point 4, after the particle damper was installed, was the largest compared to the point without the particle damper, reaching 62%; while the vibration reduction at measuring point 6 was the smallest, reaching 11%. The average reduction at the six measuring points was 45%.

[0073] Table 1 Vibration amplitude data at measuring points

[0074] Operating conditions Measurement point 1 Measurement point 2 Measurement point 3 Measurement point 4 Measurement point 5 Measurement point 6 Unloaded 2.60489 3.59971 1.02251 3.52541 8.35212 1.78129 Particle damper 1.34358 1.30684 0.58907 1.35152 4.43345 1.58165 reduction 48% 64% 42% 62% 47% 11%

[0075] The advantage of the vibration method is that it can avoid the influence of background noise during noise testing. Therefore, for on-site noise control, the noise of each machine can be measured and analyzed separately, making it more suitable for measuring the load noise of motors.

[0076] The vibration and noise testing platform disclosed in this application can simulate a vibration environment through a vibration source 300, causing the test bench 100 to drive the adapter 200 and the device under test 500 to vibrate. The vibration acceleration at a corresponding position of the device under test 500 is detected by a vibration acceleration sensor, and the corresponding vibration noise can be calculated based on the vibration acceleration. This application provides an adapter 200 on the test bench for mounting the device under test 500. Depending on the actual mounting angle of the device under test 500, a suitable adapter 200 can be selected to mount the device under test 500 at its actual mounting angle, thereby simulating the actual working environment of the device under test 500 and ensuring that the vibration and noise test of the device under test 500 on this vibration and noise testing platform is consistent with that of the device under test 500 in a real vehicle. When different devices under test 500 need to be tested, it is not necessary to replace the entire vibration and noise test platform. Only the adapter 200 that matches the device under test 500 needs to be installed on the test bench, which reduces the testing cost.

[0077] like Figure 5 As shown in a specific embodiment of this application, the adapter 200 may include a main mounting side 210 and a test mounting side 220. The main mounting side 210 is fixed on the test bench 100, and the device under test 500 is used to be mounted on the test mounting side 220. A first mounting hole 211 may be provided on the main mounting side 210, and a second mounting hole 121 corresponding to the first mounting hole 211 is provided on the test bench 100. By using fasteners passing through the first mounting hole 211 and the second mounting hole 121 respectively, the adapter 200 can be fixed on the test bench 100.

[0078] The number of first mounting holes 211 on the mounting side 210 of the main body can be designed by those skilled in the art according to requirements. This embodiment does not limit the specific number of first mounting holes 211. The number and arrangement of second mounting holes 121 provided on the test bench 100 can be based on a form that can cooperate with multiple adapter devices 200. For example, if the test bench 100 can install three types of adapter devices 200, and the number and arrangement of the first mounting holes 211 of the three adapter devices 200 are different, then second mounting holes 121 corresponding to the first mounting holes 211 of these three adapter devices 200 need to be provided on the test bench 100.

[0079] The test mounting side 220 is provided with a third mounting hole 221 for mounting the device under test 500. In this embodiment, the third mounting hole 221 can be provided on the test mounting side 220 based on the fastening hole on the device under test 500, so that fasteners can be used to pass through the fastening hole and the third mounting hole 221 on the device under test 500 respectively, thereby fixing the device under test 500 on the adapter 200.

[0080] The mounting side 210 and the test mounting side 220 can be supported by reinforcing ribs 230. The angle between the mounting side 210 and the test mounting side 220 can be adjusted according to the position and height of the reinforcing ribs 230 at each position.

[0081] The test mounting side 220 has a cutout area at least at the position corresponding to the first mounting hole 211 to prevent the test mounting side 220 from affecting the installation of the adapter 200. This allows fasteners to be inserted through the cutout area to achieve the installation of the adapter 200.

[0082] During the installation of the device under test 500 on the adapter 200, the installation position may deviate to some extent due to factors such as machining accuracy and assembly errors. In a specific embodiment of this application, the third mounting hole 221 is an oblong hole. The oblong hole provides additional installation adjustment space, allowing the device under test 500 to make a small displacement in the long axis direction of the oblong hole. For example, when the device under test 500 deviates slightly from the third mounting hole 221 of the test mounting side 220, the position of the device under test 500 can be finely adjusted through the oblong hole to ensure smooth installation and avoid installation failure or structural damage caused by forced installation due to difficulty in hole alignment.

[0083] For machining the third mounting hole 221, the machining accuracy requirements for round holes are relatively high, requiring strict control over the hole diameter and positional accuracy. In contrast, the requirements for machining accuracy for oblong holes are relatively lower. Including an oblong hole among two opposing mounting holes can appropriately reduce the overall precision requirements for hole machining in the mounting structure, thereby reducing machining costs and difficulty. Simultaneously, during assembly, the adjustment space provided by the oblong hole reduces the demanding skill requirements on assembly workers, improving assembly efficiency.

[0084] like Figure 1 As shown, the plane where the main body mounting side 210 is located is parallel to the plane where the test mounting side 220 is located. Figure 1 In the illustrated solution, the device under test (DUT) 500 is mounted on the adapter 200 while maintaining a horizontal position. The adapter 200 is suitable for scenarios where the DUT 500 is mounted horizontally on a vehicle. For example, the controller cover is typically horizontal.

[0085] like Figure 3 As shown, the plane where the main body mounting side 210 is located and the plane where the test mounting side 220 is located can form an acute angle. Figure 3In the illustrated scheme, after the device under test 500 is installed on the adapter 200, the position of the device under test 500 is tilted at a certain angle to the horizontal plane. The adapter 200 is suitable for scenarios where the device under test 500 is installed on a vehicle in an tilted state.

[0086] like Figure 4 As shown, the plane where the main body mounting side 210 is located is perpendicular to the plane where the test mounting side 220 is located. Figure 4 In the illustrated scheme, after the device under test (DUT) 500 is mounted on the adapter 200, the position of the DUT 500 is perpendicular to the horizontal plane. The adapter 200 is suitable for scenarios where the DUT 500 is mounted vertically on a vehicle. For example, the transmission housing is normally in a vertical position.

[0087] like Figure 2 As shown in a specific embodiment of this application, the test bench 100 may include bench legs 110, a bench platform 120, and a bench support 130. Multiple bench legs 110 may be provided. Figure 2 In the illustrated design, there are four support legs 110, and the platform 120 is a rectangular flat plate structure, located on top of the support legs 110. The four support legs 110 are respectively supported at the four corners of the platform 120.

[0088] The test bench support 130 is located at the bottom of the test bench leg 110, and the test bench support 130 is provided with a fourth mounting hole 131 for fixing to the position to be fixed. It is fixed to the corresponding position by fasteners passing through the fourth mounting hole 131, such as on the ground, or it can be fixed to the corresponding base, thereby ensuring the stability of the test bench 100 and preventing shaking during the experiment.

[0089] In one specific embodiment of this application, the vibration source 300 can be mounted on the underside of the test platform 120 via a vibration bracket 400. Of course, the vibration source 300 can also be mounted in other locations via the vibration bracket 400 as needed, and is not limited to the underside of the test platform 120.

[0090] like Figure 2 , Figure 6 and Figure 7 As shown in a specific embodiment of this application, the test bench 100 is provided with a counterweight fixing part 122 for mounting counterweights 600. The counterweights 600 can be fixed to the counterweight fixing part 122 by fasteners. Specifically, the counterweight fixing parts 122 can be distributed at the four corners of the test bench 120 to surround the second mounting hole 121, so that each set of counterweights 600 surrounds the device under test 500.

[0091] The counterweight fixing part 122 may include multiple threaded fixing holes to improve the reliability of fixing the counterweight 600. It should be noted that the counterweight 600 also needs to be provided with corresponding fixing holes. After the fastener passes through the fixing holes on the counterweight 600, it is tightened into the threaded fixing holes of the counterweight fixing part 122, thereby fixing the counterweight 600 on the test bench 100.

[0092] This embodiment of the application, by setting counterweights 600 on the test bench 100, can adjust the modal frequencies of the test bench 100, thereby simulating more realistic scenarios and improving accuracy. Specifically, the modal frequencies can be adjusted by setting the number and position of the counterweights 600. For example, the number of counterweights 600 at different positions can be different, and the modal frequencies can be adjusted accordingly. This embodiment is not limited in the method of adjusting the modal frequencies. Those skilled in the art can, based on their needs, select different or the same number of counterweights 600 at different positions; and the counterweights 600 can also be left unfixed at some counterweight fixing parts 122, etc.

[0093] In summary, the vibration and noise testing platform disclosed in this application has the following technical effects:

[0094] (1) The advantage of the vibration method is that it can be free from the influence of background noise during the test and has lower requirements for the test environment;

[0095] (2) By designing a suitable adapter 200, vibration and noise testing of electric drive devices with different structures and directions can be quickly achieved;

[0096] (3) During the design phase, through rapid matching design, the vibration and noise characteristics and performance of structures such as electric drive cover plates (e.g., controller cover plates of electric drive systems) can be tested before the production of electric drive cylinder blocks, crankshafts, gears, etc., thereby accelerating the R&D and iteration speed and reducing R&D time and cost investment.

[0097] (4) It can eliminate the influence of noise transmission, accurately locate the position of radiated noise, and the proportion of noise contribution at each different structural position;

[0098] (5) It can control the vibration input frequency, independently analyze the generation and propagation characteristics of vibration noise in different frequency bands, and guide the design of vibration reduction and noise reduction measures.

[0099] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0100] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0101] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0102] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A vibration and noise testing platform, characterized in that, include: Test bench (100); The adapter (200) is detachably mounted on the test bench (100), and the adapter (200) is provided with a mounting part for mounting the device under test (500) so that the device under test (500) is mounted on the adapter (200) according to the actual mounting angle. A vibration source (300) is provided, the vibration output end of which acts on the test bench (100); A vibration acceleration sensor is used to detect the vibration acceleration at a corresponding position of the device under test (500).

2. The vibration noise test platform of claim 1, wherein, The adapter (200) includes a main body mounting side (210) and a test mounting side (220). The main body mounting side (210) is fixed on the test bench (100), and the device under test (500) is used to be mounted on the test mounting side (220).

3. The vibration noise test platform of claim 2, wherein, The plane where the main body mounting side (210) is located is parallel to the plane where the test mounting side (220) is located.

4. The vibration noise test platform of claim 2, wherein, The plane where the main body mounting side (210) is located forms an acute angle with the plane where the test mounting side (220) is located.

5. The vibration noise test platform of claim 2, wherein, The plane where the main body mounting side (210) is located is perpendicular to the plane where the test mounting side (220) is located.

6. The vibration noise test platform of any one of claims 2-5, wherein, The mounting side (210) of the main body is provided with a first mounting hole (211), and the test bench (100) is provided with a second mounting hole (121) corresponding to the first mounting hole (211). The test mounting side (220) is provided with a third mounting hole (221) for mounting the device under test (500).

7. The vibration noise test platform of claim 6, wherein, The third mounting hole (221) is an oblong hole.

8. The vibration noise test platform of any one of claims 1-5, wherein, The test bench (100) includes: Support legs for the platform (110); A platform (120) is disposed on top of the platform support leg (110); A platform support (130) is provided at the bottom of the platform support leg (110), and the platform support (130) is provided with a fourth mounting hole (131) for fixing to the position to be fixed.

9. The vibration noise test platform of claim 8, wherein, The vibration source (300) is mounted on the underside of the platform (120) via a vibration bracket (400).

10. The vibration and noise testing platform according to any one of claims 1-5, characterized in that, The vibration source (300) is one of the following: exciter, vibration table, actuator, and electric drive system; And / or, The device under test (500) is either the entire electric drive system or a component of the electric drive system; And / or, The test bench (100) is provided with a counterweight fixing part (122) for installing a counterweight (600) to adjust the modal frequency of the test bench (100).

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