CN111638070B - A kind of in-wheel motor vibration damping performance testing system and testing method - Google Patents

Abstract

The invention discloses a system for testing the vibration damping performance of a hub motor, which comprises a control center, a road surface simulation assembly and a hub motor vehicle simulation assembly controlled by the control center, and a sensor assembly for detecting the vibration damping performance of the hub motor vehicle simulation assembly. And the hub motor vehicle simulation component is internally provided with a hub motor dynamic vibration absorber component and a vehicle body suspension vibration absorber component. The hub motor shaft sensor and the hub motor rotor sensor are subjected to data processing by the control center to realize the performance test and evaluation of the hub motor dynamic vibration absorber; and the vehicle body sensor and the axle sensor realize the suspension performance test and evaluation through data processing of the control center.

Description

A kind of in-wheel motor vibration damping performance testing system and testing method

technical field

The invention relates to the technical field of vehicle vibration and noise control, in particular to a vibration damping performance testing system of an in-wheel motor and a testing method thereof.

Background technique

In-wheel motor-driven vehicles Since the motor can be directly installed in the hub, the driving torque of each wheel can be flexibly controlled and distributed, so compared to traditional cars, vehicle dynamics control can be better used in this new structure. On the vehicle, the dynamic performance and handling performance of the whole vehicle will also be improved, which has become an important development direction of electric vehicles.

However, when the vehicle is driven by an in-wheel motor, the unsprung mass increases, resulting in deterioration of ride comfort and handling stability.

In order to reduce the negative impact of the in-wheel motor on the ride comfort and handling stability of the vehicle, it is necessary to design a dynamic vibration absorber damping system to be used in conjunction with the wheel and in-wheel motor assembly. It is directly related to the development and performance evaluation of the dynamic vibration absorber vibration reduction system.

In the technology of vibration damping performance testing system for vehicle in-wheel motors, the invention patent with publication number CN109738210A is a performance testing device and testing method for dynamic vibration absorber of automobile drive shaft, including a fixed base installed on the ground, and a bracket installed on the fixed base On the upper side, the dynamic vibration absorber is sleeved on the drive shaft, the end of the drive shaft is installed on the mounting seat, the drive shaft is installed on the test device, and the performance of the drive shaft dynamic vibration absorber is tested.

However, the device and method ignore the influence of the wheel tire stiffness damping on the dynamic shock absorber, and do not consider the influence of the body mass and load, and the body suspension stiffness damping on the in-wheel motor, resulting in the deviation of the vibration damping performance test results from the actual situation. larger.

SUMMARY OF THE INVENTION

The purpose of the present invention is to ignore the influences of wheel tire stiffness damping, vehicle body mass and load, and body suspension stiffness damping in the existing vehicle in-wheel motor vibration damping performance measurement system and test method, so that the vibration damping performance test results are inconsistent with the actual The technical defect of the large deviation of the situation is solved, and a vibration damping performance test system of the in-wheel motor is provided.

Another object of the present invention is to provide a test method for the above-mentioned vibration reduction performance test system of an in-wheel motor.

The technical scheme adopted for realizing the purpose of the present invention is:

1. an in-wheel motor vibration reduction performance test system, is characterized in that, comprises road surface simulation component, in-wheel motor vehicle simulation component, sensor component and control center;

The road surface simulation component includes a simulated road surface drive motor, a rotating shaft mounted on the output shaft of the simulated road surface drive motor through an elastic coupling, and a simulated road surface runner mounted on the rotating shaft and rotating therewith. The road runner is rotatably connected to the bracket through the rotating shaft, and the circumferential surface of the simulated road runner forms the action surface of the simulated road surface;

The in-wheel motor vehicle simulation component includes a wheel consisting of a tire and a hub, an in-wheel motor rotor and an in-wheel motor stator for driving the wheel to rotate, an in-wheel motor shaft, a pressure block for simulating vehicle body loads, and a The adjustable mass block on the pressure block, the wheel, the hub motor rotor, the hub motor stator and the hub motor shaft are arranged horizontally and concentrically, one end of the hub motor shaft is mounted with the wheel, and the other end is fixed to the hub motor through a bearing On the shaft bracket, the pressure block is installed above the in-wheel motor shaft through the vehicle body suspension vibration absorber assembly, and the in-wheel motor dynamic vibration absorber assembly is installed between the inside of the in-wheel motor rotor and the in-wheel motor shaft;

The sensor assembly includes an in-wheel motor shaft sensor and an in-wheel motor rotor sensor for evaluating the vibration damping performance of the in-wheel motor dynamic vibration absorber assembly, and a vehicle body for evaluating the vibration damping performance of the vehicle body suspension vibration absorber assembly Sensor and axle sensor; the in-wheel motor shaft sensor is installed on the in-wheel motor shaft inside the in-wheel motor rotor, the in-wheel motor rotor sensor is installed on the in-wheel motor rotor, and the vehicle body sensor is installed on the pressure On the pressure block, the axle sensor is installed on the hub motor shaft under the pressure block;

The simulated road driving motor and the in-wheel motor stator are respectively electrically connected with the control center, and the sensor assembly is connected in communication with the control center.

In the above technical solution, the in-wheel motor vehicle simulation component is arranged on a horizontal surface, the road surface simulation component is arranged in a pit below the horizontal surface, and the simulated road surface runner is located directly under the tire, and the two are in contact with each other. ; The simulated road driving motor and the in-wheel motor stator are respectively electrically connected with the data interface box in the control center.

In the above technical solution, the road surface simulation assembly further includes a drive motor bracket for supporting the simulation road surface drive motor.

In the above technical solution, the simulated road runner is one of a plurality of replaceable runners, and the roughness and flatness of the working surface of each runner are different to simulate different road surfaces.

In the above technical solution, the vehicle body suspension vibration absorber assembly includes a suspension spring, a suspension fixed damper and a suspension adjustable damper; the in-wheel motor dynamic vibration absorber assembly includes a dynamic vibration absorber spring, a dynamic vibration absorber Fixed dampers and dynamic vibration absorbers adjustable dampers.

In the above technical solution, the suspension spring is installed on the hub motor shaft through a suspension spring lower support, and the upper end is installed on the pressure block through a suspension fixed damper upper support;

The suspension fixed damper is installed on the hub motor shaft through the lower support of the suspension fixed damper, and the upper end is installed on the pressure block through the upper support of the suspension fixed damper;

The suspension adjustable damper is installed on the hub motor shaft through the lower support of the suspension adjustable damper, and the upper end is installed on the pressure block through the upper support of the suspension adjustable damper;

The lower end of the dynamic vibration absorber spring is installed on the hub motor shaft through the lower support of the dynamic vibration absorber spring, and the upper end is installed on the rotor of the in-wheel motor through the upper support of the dynamic vibration absorber spring;

The lower end of the dynamic vibration absorber fixed damper is installed on the hub motor shaft through the lower support of the dynamic vibration absorber fixed damper, and the upper end is installed on the hub motor rotor through the upper support of the dynamic vibration absorber fixed damper;

The lower end of the adjustable damper of the dynamic vibration absorber is installed on the hub motor shaft through the lower support of the adjustable damper of the dynamic vibration absorber, and the upper end is installed on the rotor of the hub motor through the upper support of the adjustable damper of the dynamic vibration absorber .

In the above technical solution, the in-wheel motor shaft sensor is an acceleration sensor, a speed sensor or a displacement sensor;

The in-wheel motor rotor sensor is an acceleration sensor, a speed sensor or a displacement sensor;

The vehicle body sensor is an acceleration sensor, a speed sensor or a displacement sensor;

The axle sensor is an acceleration sensor, a speed sensor or a displacement sensor.

In the above technical solution, the in-wheel motor shaft sensor and the in-wheel motor rotor sensor are respectively connected with the control center through wireless communication.

In the above technical solution, the vehicle body sensor and the axle sensor are connected with the control center through wireless communication connection or data line.

Another aspect of the present invention, the test method of the above-mentioned in-wheel motor vibration damping performance test system, comprises the following steps:

Step 1: Install and debug the in-wheel motor vibration damping performance test system;

Step 2: the control center controls the simulated road surface driving motor to turn on, and drives the rotating shaft to rotate, thereby driving the simulated road surface runner to rotate;

Step 3: the control center controls the in-wheel motor stator to be energized, and the in-wheel motor stator electromagnetically drives the in-wheel motor rotor after being energized, thereby driving the wheel to rotate;

Step 4: The in-wheel motor shaft sensor and the in-wheel motor rotor sensor transmit the collected vibration absorber test data to the control center through wireless communication; the vehicle body sensor and the axle sensor collect the collected vibration absorber through wireless communication or data cable. The received suspension test data is transmitted to the control center;

Step 5: The control center analyzes and calculates the received vibration absorber test data to obtain the transfer function and amplitude-frequency characteristics of the in-wheel motor dynamic vibration absorber;

The control center analyzes the received suspension test data to calculate the transfer function and amplitude-frequency characteristics of the suspension;

Step 6: Replace the simulated road wheel, body adjustable mass, dynamic vibration absorber spring, dynamic vibration absorber fixed damper, dynamic vibration absorber adjustable damper, suspension spring, suspension fixed damper and suspension adjustable For one or more of the dampers, repeat steps 1-5 for test and evaluation results.

Compared with the prior art, the beneficial effects of the present invention are:

1. The in-wheel motor vibration damping performance test system provided by the present invention includes a road surface simulation component and an in-wheel motor vehicle simulation component, wherein the in-wheel motor vehicle simulation component includes a wheel and a pressure block for simulating the vehicle body load, and restores as much as possible. The real driving state of the in-wheel motor vehicle is reduced, and the influence of road conditions, wheel stiffness damping, body mass and load, and body suspension stiffness damping on the vibration damping performance test results during driving is reduced, and the accuracy of the vibration damping performance test results is improved. .

2. The test method of the in-wheel motor vibration damping performance test system provided by the present invention is controlled by the control center to simulate the opening and closing of the road drive motor and the energization of the in-wheel motor stator, thereby indirectly controlling the simulation of the road runner and the rotation of the wheel, automatically Simulate the real driving process of the vehicle. The sensor component is connected to the control center in communication, and the data detected by the sensor component is received and analyzed in real time. The test method is that the control center automatically collects and analyzes the real-time data detected by the sensor components under the real driving state of the in-wheel motor vehicle as much as possible, and the test results have high accuracy.

Description of drawings

Figure 1 shows a schematic diagram of the structure of the in-wheel motor vibration reduction performance test system.

In the picture: 1-simulated road left support, 2-spin shaft, 3-simulated road runner, 4-elastic coupling, 5-wheel, 6-wheel motor rotor, 7-wheel motor stator, 8-wheel motor shaft sensor , 9- Dynamic vibration absorber spring lower bearing, 10- Dynamic vibration absorber fixed damper lower bearing, 11- Dynamic vibration absorber adjustable damper lower bearing, 12- Dynamic vibration absorber spring, 13- Dynamic vibration absorber spring Support, 14-dynamic vibration absorber fixed damper upper support, 15-dynamic vibration absorber adjustable damper upper support, 16-wheel motor rotor sensor, 17-dynamic vibration absorber fixed damper, 18-dynamic vibration absorber adjustable Adjustable damper, 19- Suspension fixed damper upper support, 20- Suspension fixed damper upper support, 21- Suspension adjustable damper upper support, 22- Adjustable mass block, 23- Suspension spring , 24-body sensor, 25-suspension fixed damper, 26-pressure block, 27-suspension adjustable damper, 28-suspension spring lower support, 29-suspension fixed damper lower support, 30 - Suspension Adjustable Damper Lower Mount, 31- Hub Motor Shaft, 32- Data Interface Box, 33- Control Center, 34- Hub Motor Shaft Bracket, 35- Axle Sensor, 36- Analog Road Drive Motor, 37- Analog Pavement right support, 38-drive motor support.

Detailed ways

The present invention will be further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

Example 1

An in-wheel motor vibration reduction performance testing system, comprising a control center 33, a road surface simulation component controlled by the control center 33, an in-wheel motor vehicle simulation component, and a sensor component for detecting the vibration reduction performance of the in-wheel motor vehicle simulation component , the sensor assembly is connected in communication with the control center 33;

The road surface simulation component is located below the in-wheel motor vehicle simulation component, and includes a simulated road surface drive motor 36 that is electrically connected to the data interface box 32 in the control center 33, and is installed on the simulated road surface drive motor through an elastic coupling 4. The rotating shaft 2 on the output shaft of 36, the simulated road runner 3 installed on the rotating shaft 2 and rotating therewith, and the bracket rotatably connected with the rotating shaft 2 for providing the supporting force for the simulated road runner, so the The support includes a left support 1 of the simulated road surface and a right support 37 of the simulated road surface, which are respectively located on the left and right sides of the simulated road surface runner, and the circumferential surface of the simulated road surface runner 3 forms the action surface of the simulated road surface;

The in-wheel motor vehicle simulation component includes a wheel 5 composed of a tire and a hub, an in-wheel motor rotor 6 and an in-wheel motor stator 7, an in-wheel motor shaft 31, an in-wheel motor rotor 6 and an in-wheel motor stator 7, which are in communication with the control center 33 and used to drive the wheel 5 to rotate. In order to simulate the pressure block 26 of the vehicle body load and the adjustable mass block 22 placed on the pressure block 26, the wheel 5, the in-wheel motor rotor 6, the in-wheel motor stator 7 and the in-wheel motor shaft 31 are arranged horizontally and concentrically, One end of the in-wheel motor shaft 31 is mounted with the wheel 5 , the other end is fixed on the in-wheel motor shaft bracket 34 through a bearing, and the pressure block 26 is installed above the in-wheel motor shaft 31 through the vehicle body suspension vibration absorber assembly , a hub motor dynamic vibration absorber assembly is installed between the hub motor rotor 6 and the hub motor shaft 31, the hub motor stator 7 is electrically connected to the data interface box 32 in the control center 33, and the wheel 5 is electrically connected to The lower simulated road runner 3 is in contact, and the circumferential surface of the wheel 5 interacts with the active surface to simulate the interaction of the wheel on the road.

The sensor assembly includes an in-wheel motor shaft sensor 8 and an in-wheel motor rotor sensor 16 for evaluating the vibration reduction performance of the in-wheel motor dynamic vibration absorber assembly, and a sensor for evaluating the vibration-reducing performance of the vehicle body suspension vibration absorber assembly. The vehicle body sensor 24 and the axle sensor 35; the in-wheel motor shaft sensor 8 is installed on the in-wheel motor shaft 31 inside the in-wheel motor rotor 6, and the in-wheel motor rotor sensor 16 is installed on the in-wheel motor rotor 6, so The vehicle body sensor 24 is mounted on the pressure block 26 , and the axle sensor 35 is mounted on the in-wheel motor shaft 31 below the pressure block 26 .

Example 2

Preferably, the road surface simulation assembly further includes a drive motor bracket 38 for supporting the simulation road surface drive motor 36 . The setting of the drive motor bracket 38 , the left support 1 of the simulated road surface and the right support 37 of the simulated road surface is to make the road surface simulation component run stably as a whole. Equipped with elastic coupling 4, it is used to reduce the vibration transmitted from the simulated road driving motor to the simulated road runner, ensure the smooth operation of the simulated road runner, and reduce the measurement error caused by the shaking of the simulated road runner.

Preferably, the simulated road runner 3 can be replaced to adapt to measurements under different road conditions.

Preferably, the vehicle body suspension vibration absorber assembly includes a suspension spring 23, a suspension fixed damper 25 and a suspension adjustable damper 27. The suspension fixed damper 25 and the suspension adjustable damper 27 are designed for this purpose. The function of the system is to absorb the vibration from the road excitation under the action of different body weights, and the damping can be adjusted according to the change of the frame load, so that the vibration reduction effect of the frame is better.

The in-wheel motor dynamic vibration absorber assembly includes the dynamic vibration absorber spring 12, the dynamic vibration absorber fixed damper 17 and the dynamic vibration absorber adjustable damper 18. The dynamic vibration absorber fixed damper 17 and the dynamic vibration absorber adjustable damper 18 are for The added function of this system is to absorb vibration from road excitation and in-wheel motor under the action of different in-wheel motor weights, and can adjust the damping according to the change of in-wheel motor load, so as to minimize the impact of in-wheel motor on the body.

The lower end of the dynamic vibration absorber spring 12 is installed on the hub motor shaft 31 through the dynamic vibration absorber spring lower support 9, and the upper end is installed on the hub motor rotor 6 through the dynamic vibration absorber spring upper support 13, which is convenient for dynamic vibration absorption. Replacement and installation of the spring 12;

The lower end of the dynamic vibration absorber fixed damper 17 is installed on the hub motor shaft 31 through the dynamic vibration absorber fixed damper lower support 10, and the upper end is installed on the in-wheel motor rotor through the dynamic vibration absorber fixed damper upper support 14. 6, it is convenient to replace and install the fixed damper 17 of the dynamic vibration absorber;

The lower end of the dynamic vibration absorber adjustable damper 18 is installed on the hub motor shaft 31 through the dynamic vibration absorber adjustable damper lower support 11, and the upper end is installed on the dynamic vibration absorber adjustable damper upper support 15. On the hub motor rotor 6, it is convenient to replace and install the adjustable damper 18 of the dynamic vibration absorber;

The suspension spring 23 is installed on the hub motor shaft 31 through the suspension spring lower support 28, and the upper end is installed on the pressure block 26 through the suspension fixed damper upper support 19, which is convenient for the suspension spring 23. replacement installation;

The suspension fixed damper 25 is installed on the hub motor shaft 31 through the suspension fixed damper lower support 29, and the upper end is installed on the pressure block 26 through the suspension fixed damper upper support 20, which is convenient for suspension. Replacement and installation of the fixed damper 25;

The suspension adjustable damper 27 is installed on the hub motor shaft 31 through the suspension adjustable damper lower support 30, and the upper end is installed on the pressure block 26 through the suspension adjustable damper upper support 21 , to facilitate the replacement and installation of the suspension adjustable damper 27 .

Specifically, the in-wheel motor shaft sensor 8 , the in-wheel motor rotor sensor 16 , the vehicle body sensor 24 and the axle sensor 35 are respectively an acceleration sensor, a speed sensor or a displacement sensor. All the above-mentioned sensors can obtain required test results through mathematical calculation processes such as integration and derivation. The specific calculation process belongs to the prior art in the field, and is not described here.

Preferably, the in-wheel motor shaft sensor 8 and the in-wheel motor rotor sensor 16 are respectively connected with the control center 33 through wireless communication to avoid line entanglement caused by rotation.

Preferably, both the vehicle body sensor 24 and the axle sensor 35 are connected to the control center 33 through wireless communication connection or data line.

Example 3

The test method of the in-wheel motor vibration damping performance test system described in the embodiment 1 comprises the following steps:

Step 1: Install and debug the in-wheel motor vibration damping performance test system;

Step 2: The control center 33 issues an instruction to control the simulated road driving motor 36 to turn on through the data interface box 32, and drives the rotating shaft 2 to rotate, thereby driving the simulated road runner 3 to rotate;

Step 3: The control center 33 issues an instruction to control the in-wheel motor stator 7 to be energized through the data interface box 32, and the in-wheel motor stator 7 electromagnetically drives the in-wheel motor rotor 6 after being energized, thereby driving the wheel 5 to rotate;

Step 4: The control center 33 issues a measurement command, the in-wheel motor shaft sensor 8 and the in-wheel motor rotor sensor 16 transmit the collected vibration absorber test data to the control center 33 through wireless communication; the vehicle body sensor 24 and all The axle sensor 35 transmits the collected suspension test data to the control center 33 through wireless communication or data line;

Step 5: The control center 33 analyzes and calculates the received vibration absorber test data to obtain the transfer function and amplitude-frequency characteristics of the in-wheel motor dynamic vibration absorber;

The control center 33 analyzes the received suspension test data to obtain the transfer function and amplitude-frequency characteristic of the suspension;

Step 6: Replace the simulated road runner 3, body adjustable mass block 22, dynamic vibration absorber spring 12, dynamic vibration absorber fixed damper 17, dynamic vibration absorber adjustable damper 18, suspension spring 23, suspension fixed damping One or more of the damper 25 and the suspension adjustable damper 27, repeat steps 1-5 to obtain test and evaluation results.

The calculation process of the transfer function and the amplitude-frequency characteristic belongs to the prior art in the field, and the following documents may be referred to:

(1) Weizhi Song; Yanqing Zhao; Haijun Zhao; Hui Zhou; Kai Liang; Adaptive dynamic vibration absorber based on a new type of smart material, Noise Control Engineering Journal, 2017, 65(3): 191-196.

(2) Song Weizhi; Yao Yongyu; Zhao Haijun; Zhao Hongxia;

I won't go into details here.

The above are only the preferred embodiments of the present invention. It should be noted that, for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. These improvements and Retouching should also be regarded as the protection scope of the present invention.

Claims (8)

1. an in-wheel motor vibration reduction performance test system, is characterized in that, comprises road surface simulation component, in-wheel motor vehicle simulation component, sensor component and control center; The road surface simulation component includes a simulated road surface drive motor, a rotating shaft mounted on the output shaft of the simulated road surface drive motor through an elastic coupling, and a simulated road surface runner mounted on the rotating shaft and rotating therewith. The road runner is rotatably connected to the bracket through the rotating shaft, and the circumferential surface of the simulated road runner forms the action surface of the simulated road surface; the simulated road runner is one of a plurality of replaceable runners, and each The roughness and flatness of the working surface of the runner are different to simulate different road surfaces; The in-wheel motor vehicle simulation component includes a wheel consisting of a tire and a hub, an in-wheel motor rotor and an in-wheel motor stator for driving the wheel to rotate, an in-wheel motor shaft, a pressure block for simulating vehicle body loads, and a The adjustable mass block on the pressure block, the wheel, the hub motor rotor, the hub motor stator and the hub motor shaft are arranged horizontally and concentrically, one end of the hub motor shaft is mounted with the wheel, and the other end is fixed to the hub motor through a bearing On the axle bracket, the pressure block is installed above the hub motor shaft through the body suspension vibration absorber assembly, and the body suspension vibration absorber assembly includes a suspension spring, a suspension fixed damper and a suspension adjustable A damper; a hub motor dynamic vibration absorber assembly is installed between the inside of the hub motor rotor and the hub motor shaft; the hub motor dynamic vibration absorber assembly includes a dynamic vibration absorber spring, a dynamic vibration absorber fixed damper and a dynamic vibration absorber adjustable damper; The sensor assembly includes an in-wheel motor shaft sensor and an in-wheel motor rotor sensor for evaluating the vibration damping performance of the in-wheel motor dynamic vibration absorber assembly, and a vehicle body for evaluating the vibration damping performance of the vehicle body suspension vibration absorber assembly sensor and axle sensor; the in-wheel motor shaft sensor is installed on the in-wheel motor shaft inside the in-wheel motor rotor, the in-wheel motor rotor sensor is installed on the in-wheel motor rotor, and the vehicle body sensor is installed in the pressure On the pressure block, the axle sensor is installed on the hub motor shaft under the pressure block; The simulated road driving motor and the in-wheel motor stator are respectively electrically connected with the control center, and the sensor assembly is connected in communication with the control center. 2 . The in-wheel motor vibration reduction performance testing system according to claim 1 , wherein the in-wheel motor vehicle simulation component is arranged on a horizontal plane, the road surface simulation component is arranged in a pit below the horizontal plane, and the The simulated road runner is located directly under the tire, and the two are in contact; the simulated road driving motor and the in-wheel motor stator are respectively electrically connected to the data interface box in the control center. 3. The in-wheel motor vibration reduction performance testing system according to claim 1, wherein the road surface simulation assembly further comprises a drive motor bracket for supporting the simulated road surface drive motor. 4. The in-wheel motor vibration damping performance test system according to claim 1, wherein the suspension spring is mounted on the in-wheel motor shaft through a suspension spring lower support, and the upper end passes through a suspension fixed damper. the support is mounted on the pressure block; The suspension fixed damper is installed on the hub motor shaft through the lower support of the suspension fixed damper, and the upper end is installed on the pressure block through the upper support of the suspension fixed damper; The suspension adjustable damper is installed on the hub motor shaft through the lower support of the suspension adjustable damper, and the upper end is installed on the pressure block through the upper support of the suspension adjustable damper; The lower end of the dynamic vibration absorber spring is installed on the hub motor shaft through the lower support of the dynamic vibration absorber spring, and the upper end is installed on the rotor of the in-wheel motor through the upper support of the dynamic vibration absorber spring; The lower end of the dynamic vibration absorber fixed damper is installed on the hub motor shaft through the lower support of the dynamic vibration absorber fixed damper, and the upper end is installed on the hub motor rotor through the upper support of the dynamic vibration absorber fixed damper; The lower end of the dynamic vibration absorber adjustable damper is installed on the hub motor shaft through the lower support of the dynamic vibration absorber adjustable damper, and the upper end is installed on the hub motor rotor through the upper support of the dynamic vibration absorber adjustable damper . 5. The in-wheel motor vibration reduction performance testing system as claimed in claim 1, wherein the in-wheel motor shaft sensor is an acceleration sensor, a speed sensor or a displacement sensor; The in-wheel motor rotor sensor is an acceleration sensor, a speed sensor or a displacement sensor; The vehicle body sensor is an acceleration sensor, a speed sensor or a displacement sensor; The axle sensor is an acceleration sensor, a speed sensor or a displacement sensor. 6 . The in-wheel motor vibration reduction performance testing system according to claim 5 , wherein the in-wheel motor shaft sensor and the in-wheel motor rotor sensor are respectively connected with the control center through wireless communication. 7 . 7 . The in-wheel motor vibration reduction performance testing system according to claim 6 , wherein the vehicle body sensor and the axle sensor are connected with the control center through wireless communication connection or data line connection. 8 . 8. The test method of the in-wheel motor vibration damping performance test system according to any one of claims 1-7, characterized in that, comprising the following steps: Step 1: Install and debug the in-wheel motor vibration damping performance test system; Step 2: the control center controls the simulated road surface driving motor to turn on, and drives the rotating shaft to rotate, thereby driving the simulated road surface runner to rotate; Step 3: the control center controls the in-wheel motor stator to be energized, and the in-wheel motor stator electromagnetically drives the in-wheel motor rotor after being energized, thereby driving the wheel to rotate; Step 4: The in-wheel motor shaft sensor and the in-wheel motor rotor sensor transmit the collected vibration absorber test data to the control center through wireless communication; the vehicle body sensor and the axle sensor collect the collected vibration absorber through wireless communication or data cable. The received suspension test data is transmitted to the control center; Step 5: The control center analyzes and calculates the received vibration absorber test data to obtain the transfer function and amplitude-frequency characteristics of the in-wheel motor dynamic vibration absorber; The control center analyzes the received suspension test data to calculate the transfer function and amplitude-frequency characteristics of the suspension; Step 6: Replace the simulated road wheel, body adjustable mass, dynamic vibration absorber spring, dynamic vibration absorber fixed damper, dynamic vibration absorber adjustable damper, suspension spring, suspension fixed damper and suspension adjustable For one or more of the dampers, repeat steps 1-5 for test and evaluation results.

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